Paleoenvironmental Standard Terms (PaST) thesaurus
type: ConceptScheme
creator: World Data Service for Paleoclimatology
description: This file contains concepts, labels, and relationships that make up the Paleoenvironmental Standard Terms (PaST) thesaurus. This representation of the thesaurus follows the Simple Knowledge Organization System (SKOS) data model and has Resource Description Framework (RDF) syntax. This file gives a snapshot of the thesaurus as of the date tagged in the SKOS ConceptScheme. Additional documentation as well as archived, static versions of the thesaurus are available at: https://www.ncei.noaa.gov/access/paleo-search/study/31892. Please cite the preceding URL, the publication listed at that URL, and the date accessed when referencing the thesaurus.
has version: 1.1
date: 2022-08-25
modified: 2022-08-25T18:00:00.040
language: en
has top concept: what
has top concept: material
has top concept: error
has top concept: unit
has top concept: seasonality
has top concept: data type
has top concept: detail
has top concept: method
has top concept: data format

what
type: Concept
definition: the description of what was measured.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
narrower: age variable
narrower: biological material
narrower: chemical composition
narrower: depth variable
narrower: earth system variable
narrower: electrical property
narrower: electromagnetic property
narrower: formation property
narrower: geological material
narrower: magnetic property
narrower: physical property
narrower: sampling metadata
narrower: statistical variable
related: data format
related: data type
related: detail
related: error
related: material
related: method
related: seasonality
related: unit
top concept of: Paleoenvironmental Standard Terms (PaST) thesaurus
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:45.0

material
type: Concept
definition: the material on which measurements were made or from which reconstructions were created.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
narrower: atmospheric material
narrower: biological material
narrower: chemical composition
narrower: geological material
narrower: hydrologic material
narrower: reconstruction material
related: data format
related: data type
related: detail
related: error
related: method
related: seasonality
related: unit
related: what
top concept of: Paleoenvironmental Standard Terms (PaST) thesaurus
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

error
type: Concept
definition: measures of the temporally-variable uncertainty that applies to the measured value.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
narrower: confidence interval
narrower: ensemble member
narrower: goodness-of-fit measure
narrower: percentile
narrower: range
narrower: standard deviation
narrower: standard error
narrower: unspecified error
narrower: variance
related: data format
related: data type
related: detail
related: material
related: method
related: seasonality
related: unit
related: what
top concept of: Paleoenvironmental Standard Terms (PaST) thesaurus
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

unit
type: Concept
definition: the units of measurement.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
narrower: angle unit
narrower: area density unit
narrower: area unit
narrower: concentration unit
narrower: dimensionless
narrower: electromagnetic unit
narrower: energy unit
narrower: gradient unit
narrower: length unit
narrower: linear density unit
narrower: mass density unit
narrower: mass unit
narrower: mathematical unit
narrower: molar mass unit
narrower: power unit
narrower: pressure unit
narrower: rate unit
narrower: reciprocal length unit
narrower: specific activity unit
narrower: specific energy unit
narrower: specific volume unit
narrower: substance unit
narrower: temperature unit
narrower: time unit
narrower: unspecified unit
narrower: volume unit
related: data format
related: data type
related: detail
related: error
related: material
related: method
related: seasonality
related: what
top concept of: Paleoenvironmental Standard Terms (PaST) thesaurus
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

seasonality
type: Concept
definition: the specific part of the annual cycle explicitly reconstructed from raw values.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
narrower: 1-month period
narrower: 10-month period
narrower: 11-month period
narrower: 2-month period
narrower: 3-month period
narrower: 4-month period
narrower: 5-month period
narrower: 6-month period
narrower: 7-month period
narrower: 8-month period
narrower: 9-month period
narrower: annual
narrower: monthly
narrower: non-calendric period
related: data format
related: data type
related: detail
related: error
related: material
related: method
related: unit
related: what
top concept of: Paleoenvironmental Standard Terms (PaST) thesaurus
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

data type
type: Concept
definition: the NOAA NCEI and WDS-Paleo proxy or reconstruction type.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
narrower: borehole
narrower: climate forcing
narrower: climate reconstructions
narrower: corals and sclerosponges
narrower: fire history
narrower: historical
narrower: ice cores
narrower: insect
narrower: instrumental
narrower: lake levels
narrower: loess and paleosol
narrower: other collections
narrower: paleoceanography
narrower: paleoclimatic modeling
narrower: paleolimnology
narrower: plant macrofossils
narrower: pollen
narrower: speleothems
narrower: tree ring
related: data format
related: detail
related: error
related: material
related: method
related: seasonality
related: unit
related: what
top concept of: Paleoenvironmental Standard Terms (PaST) thesaurus
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

detail
type: Concept
definition: alterations or transformations made to the raw data.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
narrower: anomalized
narrower: averaged
narrower: composited
narrower: corrected
narrower: detrended
narrower: differenced
narrower: filtered
narrower: infilled
narrower: interpolated
narrower: log-transformed
narrower: normalized
narrower: raw
narrower: resampled
narrower: smoothed
narrower: whitened
related: data format
related: data type
related: error
related: material
related: method
related: seasonality
related: unit
related: what
top concept of: Paleoenvironmental Standard Terms (PaST) thesaurus
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

method
type: Concept
definition: techniques, methods, procedures, or strategies for collection or analysis of scientific information (Credit: USGS thesaurus)
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
narrower: computational method
narrower: field method
narrower: laboratory method
related: data format
related: data type
related: detail
related: error
related: material
related: seasonality
related: unit
related: what
top concept of: Paleoenvironmental Standard Terms (PaST) thesaurus
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

data format
type: Concept
definition: a specification of whether data are character-based or numeric.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
narrower: C
narrower: N
related: data type
related: detail
related: error
related: material
related: method
related: seasonality
related: unit
related: what
top concept of: Paleoenvironmental Standard Terms (PaST) thesaurus
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

Jan-Mar
type: Concept
definition: a three month period that spans the months of January to March.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 3-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

Feb-Apr
type: Concept
definition: a three month period that spans the months of February to April.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 3-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

Mar-May
type: Concept
definition: a three month period that spans the months of March to May.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 3-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

Apr-Jun
type: Concept
definition: a three month period that spans the months of April to June.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 3-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

May-Jul
type: Concept
definition: a three month period that spans the months of May to July.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 3-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

Jun-Aug
type: Concept
definition: a three month period that spans the months of June to August.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 3-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

Jul-Sep
type: Concept
definition: a three month period that spans the months of July to September.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 3-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

Aug-Oct
type: Concept
definition: a three month period that spans the months of August to October.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 3-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

Sep-Nov
type: Concept
definition: a three month period that spans the months of September to November.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 3-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

Oct-Dec
type: Concept
definition: a three month period that spans the months of October to December.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 3-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

Nov-Jan
type: Concept
definition: a three month period that spans the months of November to January.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 3-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

Dec-Feb
type: Concept
definition: a three month period that spans the months of December to February.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 3-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

temperature unit
type: Concept
definition: a unit which is a standard measure of the average kinetic energy of the particles in a sample of matter (Credit: Units of measurement ontology).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: unit
narrower: degree Celsius
narrower: degree Fahrenheit
narrower: kelvin
narrower: kelvin day
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

degree Celsius
type: Concept
definition: a temperature unit which is equal to one kelvin degree. However, they have their zeros at different points. The centigrade scale has its zero at 273.15 K (Credit: Units of measurement ontology).
alternative label: Celsius
alternative label: degree C
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: temperature unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

kelvin
type: Concept
definition: a thermodynamic temperature unit which is equal to the fraction 1/273.16 of the thermodynamic temperature of the triple point of water (Credit: Units of measurement ontology).
alternative label: K
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: temperature unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

annual
type: Concept
definition: a reconstructed seasonality that consists of an average of twelve consecutive months of the calendar year.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: seasonality
narrower: Apr-Mar
narrower: Aug-Jul
narrower: Dec-Nov
narrower: Feb-Jan
narrower: Jan-Dec
narrower: Jul-Jun
narrower: Jun-May
narrower: Mar-Feb
narrower: May-Apr
narrower: Nov-Oct
narrower: Oct-Sep
narrower: Sep-Aug
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

1-month period
type: Concept
definition: a reconstructed seasonality that consists of one month of the calendar year.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: seasonality
narrower: Apr
narrower: Aug
narrower: Dec
narrower: Feb
narrower: Jan
narrower: Jul
narrower: Jun
narrower: Mar
narrower: May
narrower: Nov
narrower: Oct
narrower: Sep
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

2-month period
type: Concept
definition: a reconstructed seasonality that consists of two consecutive months of the calendar year.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: seasonality
narrower: Apr-May
narrower: Aug-Sep
narrower: Dec-Jan
narrower: Feb-Mar
narrower: Jan-Feb
narrower: Jul-Aug
narrower: Jun-Jul
narrower: Mar-Apr
narrower: May-Jun
narrower: Nov-Dec
narrower: Oct-Nov
narrower: Sep-Oct
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

3-month period
type: Concept
definition: a reconstructed seasonality that consists of three consecutive months of the calendar year.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: seasonality
narrower: Apr-Jun
narrower: Aug-Oct
narrower: Dec-Feb
narrower: Feb-Apr
narrower: Jan-Mar
narrower: Jul-Sep
narrower: Jun-Aug
narrower: Mar-May
narrower: May-Jul
narrower: Nov-Jan
narrower: Oct-Dec
narrower: Sep-Nov
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

4-month period
type: Concept
definition: a reconstructed seasonality that consists of four consecutive months of the calendar year.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: seasonality
narrower: Apr-Jul
narrower: Aug-Nov
narrower: Dec-Mar
narrower: Feb-May
narrower: Jan-Apr
narrower: Jul-Oct
narrower: Jun-Sep
narrower: Mar-Jun
narrower: May-Aug
narrower: Nov-Feb
narrower: Oct-Jan
narrower: Sep-Dec
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

6-month period
type: Concept
definition: a reconstructed seasonality that consists of six consecutive months of the calendar year.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: seasonality
narrower: Apr-Sep
narrower: Aug-Jan
narrower: Dec-May
narrower: Feb-Jul
narrower: Jan-Jun
narrower: Jul-Dec
narrower: Jun-Nov
narrower: Mar-Aug
narrower: May-Oct
narrower: Nov-Apr
narrower: Oct-Mar
narrower: Sep-Feb
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

Jan-Apr
type: Concept
definition: a four month period that spans the months of January to April.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 4-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

Feb-May
type: Concept
definition: a four month period that spans the months of February to May.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 4-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

Mar-Jun
type: Concept
definition: a four month period that spans the months of March to June.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 4-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

Apr-Jul
type: Concept
definition: a four month period that spans the months of April to July.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 4-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

May-Aug
type: Concept
definition: a four month period that spans the months of May to August.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 4-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

Jun-Sep
type: Concept
definition: a four month period that spans the months of June to September.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 4-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

Jul-Oct
type: Concept
definition: a four month period that spans the months of July to October.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 4-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

Aug-Nov
type: Concept
definition: a four month period that spans the months of August to November.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 4-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

Sep-Dec
type: Concept
definition: a four month period that spans the months of September to December.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 4-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

Oct-Jan
type: Concept
definition: a four month period that spans the months of October to January.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 4-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

Nov-Feb
type: Concept
definition: a four month period that spans the months of November to February.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 4-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

Dec-Mar
type: Concept
definition: a four month period that spans the months of December to March.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 4-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

Jan-Jun
type: Concept
definition: a six month period that spans the months of January to June.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 6-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

Feb-Jul
type: Concept
definition: a six month period that spans the months of February to July.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 6-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

Mar-Aug
type: Concept
definition: a six month period that spans the months of March to August.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 6-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

Apr-Sep
type: Concept
definition: a six month period that spans the months of April to September.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 6-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

May-Oct
type: Concept
definition: a six month period that spans the months of May to October.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 6-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

Jun-Nov
type: Concept
definition: a six month period that spans the months of June to November.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 6-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

Jul-Dec
type: Concept
definition: a six month period that spans the months of July to December.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 6-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

Aug-Jan
type: Concept
definition: a six month period that spans the months of August to January.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 6-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

Sep-Feb
type: Concept
definition: a six month period that spans the months of September to February.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 6-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

Oct-Mar
type: Concept
definition: a six month period that spans the months of October to March.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 6-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

Nov-Apr
type: Concept
definition: a six month period that spans the months of November to April.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 6-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

Dec-May
type: Concept
definition: a six month period that spans the months of December to May.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 6-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

Jan-Feb
type: Concept
definition: a two month period that spans the months of January and February.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 2-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

Feb-Mar
type: Concept
definition: a two month period that spans the months of February and March.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 2-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

Mar-Apr
type: Concept
definition: a two month period that spans the months of March and April.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 2-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

Apr-May
type: Concept
definition: a two month period that spans the months of April and May.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 2-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

May-Jun
type: Concept
definition: a two month period that spans the months of May and June.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 2-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

Jun-Jul
type: Concept
definition: a two month period that spans the months of June and July.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 2-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

Jul-Aug
type: Concept
definition: a two month period that spans the months of July and August.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 2-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

Aug-Sep
type: Concept
definition: a two month period that spans the months of August and September.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 2-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

Sep-Oct
type: Concept
definition: a two month period that spans the months of September and October.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 2-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

Oct-Nov
type: Concept
definition: a two month period that spans the months of October and November.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 2-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

Nov-Dec
type: Concept
definition: a two month period that spans the months of November and December.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 2-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

Dec-Jan
type: Concept
definition: a two month period that spans the months of December and January.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 2-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

Jan
type: Concept
definition: a one month period that spans the month of January.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 1-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

Feb
type: Concept
definition: a one month period that spans the month of February.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 1-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

Mar
type: Concept
definition: a one month period that spans the month of March.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 1-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

Apr
type: Concept
definition: a one month period that spans the month of April.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 1-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

May
type: Concept
definition: a one month period that spans the month of May.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 1-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

Jun
type: Concept
definition: a one month period that spans the month of June.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 1-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

Jul
type: Concept
definition: a one month period that spans the month of July.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 1-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

Aug
type: Concept
definition: a one month period that spans the month of August.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 1-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

Sep
type: Concept
definition: a one month period that spans the month of September.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 1-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

Oct
type: Concept
definition: a one month period that spans the month of October.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 1-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

Nov
type: Concept
definition: a one month period that spans the month of November.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 1-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

Dec
type: Concept
definition: a one month period that spans the month of December.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 1-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

Jan-Dec
type: Concept
definition: a twelve month period that spans the months of January to December.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: annual
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

Feb-Jan
type: Concept
definition: a twelve month period that spans the months of February to January.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: annual
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

Mar-Feb
type: Concept
definition: a twelve month period that spans the months of March to February.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: annual
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

Apr-Mar
type: Concept
definition: a twelve month period that spans the months of April to March.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: annual
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

May-Apr
type: Concept
definition: a twelve month period that spans the months of May to April.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: annual
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

Jun-May
type: Concept
definition: a twelve month period that spans the months of June to May.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: annual
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

Jul-Jun
type: Concept
definition: a twelve month period that spans the months of July to June.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: annual
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

Aug-Jul
type: Concept
definition: a twelve month period that spans the months of August to July.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: annual
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

Sep-Aug
type: Concept
definition: a twelve month period that spans the months of September to August.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: annual
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

Oct-Sep
type: Concept
definition: a twelve month period that spans the months of October to September.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: annual
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

Nov-Oct
type: Concept
definition: a twelve month period that spans the months of November to October.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: annual
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

Dec-Nov
type: Concept
definition: a twelve month period that spans the months of December to November.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: annual
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

corals and sclerosponges
type: Concept
definition: a data type that includes measurements made on corals, sclerosponges, or coralline algae.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: data type
related: 14C fraction modern
related: 230Th/232Th
related: 230Th/238U
related: Acropora cervicornis
related: Acropora humilis
related: Acropora millepora
related: Acropora palmata
related: Acropora samoensis
related: Acropora sp.
related: Antipathes sp.
related: Astrosclera sp.
related: Astrosclera willeyana
related: Ceratoporella nicholsoni
related: Ceratoporella sp.
related: Clathromorphum compactum
related: Clathromorphum nereostratum
related: Delta 14C
related: Desmophyllum dianthus
related: Desmophyllum sp.
related: Diploastrea heliopora
related: Diploastrea sp.
related: Diploria labyrinthiformis
related: Diploria sp.
related: Dipole Mode Index
related: Dipsastraea sp.
related: Dipsastraea speciosa
related: Gardinersoseris planulata
related: Gardinersoseris sp.
related: Goniopora hilli
related: Goniopora sp.
related: Hydnophora microconos
related: Hydnophora sp.
related: Interdecadal Pacific Oscillation Index
related: International Geo Sample Number
related: Isidella sp.
related: Isopora sp.
related: Kulamanamana haumeaae
related: Kulamanamana sp.
related: Montastraea cavernosa
related: Montastraea sp.
related: Muricella sp.
related: Mussismilia braziliensis
related: Mussismilia sp.
related: North Atlantic Oscillation Index
related: Orbicella annularis
related: Orbicella faveolata
related: Orbicella franksi
related: Orbicella sp.
related: Pacific Decadal Oscillation Index
related: Palmer Drought Severity Index
related: Pavona clavus
related: Pavona gigantea
related: Pavona sp.
related: Platygyra daedalea
related: Platygyra lamellina
related: Platygyra sp.
related: Pocillopora damicornus
related: Pocillopora sp.
related: Porites astreoides
related: Porites australiensis
related: Porites evermanni
related: Porites lobata
related: Porites lutea
related: Porites solida
related: Porites sp.
related: Pseudodiploria strigosa
related: Siderastrea radians
related: Siderastrea siderea
related: Siderastrea sp.
related: Siderastrea stellata
related: Solenastrea bournoni
related: Solenastrea sp.
related: age
related: age at sample end
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

ice cores
type: Concept
definition: a data type that includes measurements made on land-based ice.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: data type
related: 10Be
related: 129Xe/40Ar
related: 129Xe/84Kr
related: 132Xe/129Xe
related: 132Xe/36Ar
related: 132Xe/40Ar
related: 132Xe/84Kr
related: 134Xe/129Xe
related: 136Xe/129Xe
related: 143Nd/144Nd
related: 14C
related: 14CO/(14CO+14CO2)
related: 206Pb/204Pb
related: 206Pb/207Pb
related: 207Pb/204Pb
related: 207Pb/206Pb
related: 208Pb/204Pb
related: 208Pb/206Pb
related: 208Pb/207Pb
related: 210Pb
related: 36Cl
related: 3H
related: 3He
related: 3He/4He
related: 40Ar/36Ar
related: 4He
related: 84Kr/36Ar
related: 84Kr/40Ar
related: 86Kr/84Kr
related: 87Sr/86Sr
related: El Niño Southern Oscillation Index
related: International Geo Sample Number
related: North Atlantic Oscillation Index
related: accumulation rate
related: acetate
related: acidity
related: age
related: age at sample end
related: age at sample start
related: air content
related: air temperature
related: aluminum
related: ammonium
related: antimony
related: argon
related: arsenic
related: azimuth
related: barium
related: beryllium
related: beta activity
related: bismuth
related: black carbon
related: blue intensity
related: bromine
related: bulk atmosphere
related: bulk ice
related: cadmium
related: calcium
related: carbon
related: carbon dioxide
related: carbon monoxide
related: cerium
related: cesium
related: chloride
related: chlorite
related: chromium
related: cobalt
related: collection date
related: collection elevation
related: copper
related: delta 13C
related: delta 15N
related: delta 15N excess
related: delta 17O
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

paleolimnology
type: Concept
definition: a data type that includes measurements made on lake or bog deposits.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: data type
related: 137Cs
related: 87Sr/86Sr
related: C10 n-alkane
related: C11 n-alkane
related: C12 n-alkane
related: C13 n-alkane
related: C14 n-alkane
related: C15 n-alkane
related: C16 n-alkane
related: C16 n-alkanoic acid
related: C17 n-alkane
related: C17 n-alkanoic acid
related: C18 n-alkane
related: C18 n-alkanoic acid
related: C19 n-alkane
related: C19 n-alkanoic acid
related: C20 n-alkane
related: C20 n-alkanoic acid
related: C21 n-alkane
related: C21 n-alkanoic acid
related: C22 n-alkane
related: C22 n-alkanoic acid
related: C23 n-alkane
related: C23 n-alkanoic acid
related: C24 n-alkane
related: C24 n-alkanoic acid
related: C25 n-alkane
related: C25 n-alkanoic acid
related: C26 n-alkane
related: C26 n-alkanoic acid
related: C27 n-alkane
related: C27 n-alkanoic acid
related: C28 n-alkane
related: C28 n-alkanoic acid
related: C29 n-alkane
related: C29 n-alkanoic acid
related: C3 plants
related: C30 n-alkane
related: C30 n-alkanoic acid
related: C31 n-alkane
related: C31 n-alkanoic acid
related: C32 n-alkane
related: C32 n-alkanoic acid
related: C33 n-alkane
related: C33 n-alkanoic acid
related: C34 n-alkane
related: C34 n-alkanoic acid
related: C35 n-alkane
related: C37 alkenone
related: C37:2 alkenone
related: C37:3 alkenone
related: C37:4 alkenone
related: C38 alkenone
related: C38:2 alkenone
related: C38:3 alkenone
related: C38:4 alkenone
related: C4 plants
related: CIE X
related: CIE Y
related: CIE Z
related: El Niño event
related: International Geo Sample Number
related: North Atlantic Oscillation Index
related: P-aqueous
related: P-wave amplitude
related: P-wave velocity
related: S-ratio
related: Simpson diversity index
related: Southern Oscillation Index
related: absorbance
related: accumulation rate
related: acetic acid
related: actinium
related: age
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

paleoceanography
type: Concept
definition: a data type that includes measurements on ocean sediment cores and other materials collected from the marine environment.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: data type
related: 143Nd/144Nd
related: 147Sm/144Nd
related: 14C fraction modern
related: 187Os/188Os
related: 187Re/188Os
related: 206Pb/204Pb
related: 207Pb/204Pb
related: 207Pb/206Pb
related: 208Pb/204Pb
related: 208Pb/206Pb
related: 230Th
related: 230Th excess
related: 231Pa
related: 231Pa excess
related: 231Pa/230Th
related: 231Pa/230Th excess
related: 232Th
related: 234U
related: 238U
related: 238U/232Th
related: 32S
related: 46Ca/43Ca
related: 87Rb/86Sr
related: 87Sr/86Sr
related: Acarinina soldadoensis
related: Acarinina sp.
related: Antarctic Bottom Water
related: Atlantic Meridional Overturning Circulation Index
related: C10 n-alkane
related: C11 n-alkane
related: C12 n-alkane
related: C13 n-alkane
related: C14 n-alkane
related: C15 n-alkane
related: C16 n-alkane
related: C16 n-alkanoic acid
related: C17 n-alkane
related: C17 n-alkanoic acid
related: C18 n-alkane
related: C18 n-alkanoic acid
related: C19 n-alkane
related: C19 n-alkanoic acid
related: C20 n-alkane
related: C20 n-alkanoic acid
related: C21 n-alkane
related: C21 n-alkanoic acid
related: C22 n-alkane
related: C22 n-alkanoic acid
related: C23 n-alkane
related: C23 n-alkanoic acid
related: C24 n-alkane
related: C24 n-alkanoic acid
related: C25 n-alkane
related: C25 n-alkanoic acid
related: C26 n-alkane
related: C26 n-alkanoic acid
related: C27 n-alkane
related: C27 n-alkanoic acid
related: C28 n-alkane
related: C28 n-alkanoic acid
related: C29 n-alkane
related: C29 n-alkanoic acid
related: C30 n-alkane
related: C30 n-alkanoic acid
related: C31 n-alkane
related: C31 n-alkanoic acid
related: C32 n-alkane
related: C32 n-alkanoic acid
related: C33 n-alkane
related: C33 n-alkanoic acid
related: C34 n-alkane
related: C34 n-alkanoic acid
related: C35 n-alkane
related: C36 n-alkane
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

climate reconstructions
type: Concept
definition: a data type that quantifies past climatic or climate-dependent conditions that are derived, or 'reconstructed,' from paleoclimate proxy measurements.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: data type
related: Arctic Oscillation Index
related: Atlantic Multidecadal Oscillation Index
related: C3 plants
related: C4 plants
related: California Current Index
related: Delta 47
related: Delta 48
related: Dipole Mode Index
related: El Niño Southern Oscillation Index
related: El Niño event
related: Hadley circulation index
related: Interdecadal Pacific Oscillation Index
related: International Geo Sample Number
related: Intertropical Convergence Zone index
related: La Niña event
related: Niño 1+2 sea surface temperature index
related: Niño 3 sea surface temperature index
related: Niño 3.4 sea surface temperature index
related: Niño 4 sea surface temperature index
related: North Atlantic Oscillation Index
related: Northern Oscillation Index
related: Pacific Decadal Oscillation Index
related: Pacific-North American Pattern
related: Palmer Drought Severity Index
related: Palmer Hydrologic Drought Index
related: Palmer Modified Drought Index
related: South Asian Summer Monsoon Index
related: South Pacific Convergence Zone Index
related: Southern Annular Mode
related: Southern Oscillation Index
related: actual/potential evapotranspiration
related: age
related: age at sample end
related: age at sample start
related: air temperature
related: alkalinity
related: alkenone
related: alkenone unsaturation index
related: aragonite saturation state
related: biome
related: blue intensity
related: boron/calcium
related: burned area
related: cadmium
related: cadmium/calcium
related: calcium carbonate compensation depth
related: canonical correspondence analysis axis
related: carbonate ion
related: chrysophyte assemblage
related: cloud cover
related: coccolithophore assemblage
related: collection elevation
related: correspondence analysis axis
related: cryospheric quantity
related: delta 11B
related: delta 13C
related: delta 15N excess
related: delta 18O
related: delta 2H
related: density
related: depth
related: depth at sample end
related: depth at sample start
related: detrended correspondence analysis axis
related: diatom assemblage
related: dinoflagellate assemblage
related: dust
related: electrical conductivity
related: empirical orthogonal function
related: equilibrium line altitude
related: eustatic sea level
related: evaporation
related: evapotranspiration
related: extension rate
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

speleothems
type: Concept
definition: a data type that includes measurements made on cave deposits.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: data type
related: 14C dead carbon proportion
related: 87Sr/86Sr
related: Delta 47
related: Delta 48
related: International Geo Sample Number
related: North Atlantic Oscillation Index
related: age
related: age at sample end
related: age at sample start
related: aluminum oxide
related: aragonite
related: barium
related: barium/calcium
related: biogenic silica
related: calcite
related: calcium carbonate
related: cerium
related: collection date
related: collection elevation
related: delta 13C
related: delta 18O
related: delta 2H
related: delta 44Ca
related: depth
related: depth at sample end
related: depth at sample start
related: event layer
related: fluid inclusion
related: fulvic acid
related: glycerol dialkyl glycerol tetraether
related: grayscale
related: growth rate
related: ice sheet elevation
related: iron oxide
related: lanthanum
related: lanthanum/cerium
related: lanthanum/thorium
related: latitude
related: longitude
related: luminescence
related: magnesium
related: magnesium oxide
related: magnesium/calcium
related: mixed calcite/aragonite
related: neodymium
related: notes
related: number of samples
related: phosphorus pentoxide
related: praseodymium
related: precipitation
related: principal component
related: sample identification
related: sample thickness
related: silicon dioxide
related: strontium
related: strontium/calcium
related: sulfur/calcium
related: surface air temperature
related: temperature
related: thorium
related: yttrium
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

C
type: Concept
definition: a data format that can contain any character present in the Unicode set.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: data format
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

N
type: Concept
definition: a data format that contains only numbers or the missing value indicator.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: data format
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

confidence interval
type: Concept
definition: an error estimate that measures the span of values likely to contain the true value at a specified confidence level.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: error
narrower: 50% confidence interval lower bound
narrower: 50% confidence interval margin of error
narrower: 50% confidence interval upper bound
narrower: 68% confidence interval lower bound
narrower: 68% confidence interval margin of error
narrower: 68% confidence interval upper bound
narrower: 75% confidence interval lower bound
narrower: 75% confidence interval margin of error
narrower: 75% confidence interval upper bound
narrower: 90% confidence interval lower bound
narrower: 90% confidence interval margin of error
narrower: 90% confidence interval upper bound
narrower: 95% confidence interval lower bound
narrower: 95% confidence interval margin of error
narrower: 95% confidence interval upper bound
narrower: 97.5% confidence interval lower bound
narrower: 97.5% confidence interval margin of error
narrower: 97.5% confidence interval upper bound
narrower: 99% confidence interval lower bound
narrower: 99% confidence interval margin of error
narrower: 99% confidence interval upper bound
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

standard deviation
type: Concept
definition: a measure of the amount of variation or dispersion across a group of data values.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: error
narrower: one standard deviation
narrower: one standard deviation lower bound
narrower: one standard deviation upper bound
narrower: relative standard deviation
narrower: two standard deviations
narrower: two standard deviations lower bound
narrower: two standard deviations upper bound
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

borehole
type: Concept
definition: a data type that consists of direct measurements of subsurface temperature from boreholes drilled into materials such as rock and glacier ice.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: data type
related: International Geo Sample Number
related: age
related: age at sample end
related: age at sample start
related: collection date
related: collection elevation
related: depth
related: depth at sample end
related: depth at sample start
related: latitude
related: longitude
related: notes
related: number of samples
related: rock
related: sample identification
related: sample thickness
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

fire history
type: Concept
definition: a data type that includes measurements made to deduce the past history of fire, whether from tree rings, sediment, or other natural archives.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: data type
related: International Geo Sample Number
related: age
related: age at sample end
related: age at sample start
related: carbon
related: carbon/nitrogen
related: carbonate
related: charcoal
related: collection date
related: collection elevation
related: collection water depth
related: delta 13C
related: delta 15N
related: density
related: depth
related: depth at sample end
related: depth at sample start
related: dry sediment
related: latitude
related: longitude
related: magnetic susceptibility
related: mass magnetic susceptibility
related: nitrogen
related: notes
related: number of samples
related: organic matter
related: sample identification
related: sample thickness
related: sediment
related: sedimentation rate
related: tree demographic and fire event code
related: tree demographic and injury and fire event code
related: volume
related: volume magnetic susceptibility
related: wet sediment
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

tree ring
type: Concept
definition: a data type that includes measurements made on the rings of trees.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: data type
related: Arctic Oscillation Index
related: Atlantic Multidecadal Oscillation Index
related: California Current Index
related: El Niño Southern Oscillation Index
related: Hadley circulation index
related: International Geo Sample Number
related: North Atlantic Oscillation Index
related: Pacific Decadal Oscillation Index
related: Pacific-North American Pattern
related: Palmer Drought Severity Index
related: Palmer Hydrologic Drought Index
related: Palmer Modified Drought Index
related: South Asian Summer Monsoon Index
related: South Pacific Convergence Zone Index
related: Southern Annular Mode
related: Southern Oscillation Index
related: age
related: age at sample end
related: age at sample start
related: alpha cellulose
related: angle
related: average cell wall thickness
related: average microfibril angle
related: basal area increment
related: basal area mass increment
related: blue intensity
related: cell
related: cellulose
related: cloud cover
related: collection date
related: collection elevation
related: delta 13C
related: delta 15N
related: delta 18O
related: delta 2H
related: density
related: depth
related: depth at sample end
related: depth at sample start
related: diameter
related: earlywood
related: earlywood alpha cellulose
related: earlywood cellulose
related: earlywood density
related: earlywood tracheid diameter
related: earlywood width
related: event layer
related: frost ring
related: geopotential height
related: growing degree days
related: lake level
related: land surface temperature
related: latewood
related: latewood alpha cellulose
related: latewood cellulose
related: latewood density
related: latewood width
related: latitude
related: light ring
related: longitude
related: maximum density
related: maximum surface temperature
related: maximum temperature
related: minimum density
related: minimum surface temperature
related: moisture index
related: notes
related: number of samples
related: phenological event
related: pith offset
related: precipitation
related: precipitation minus potential evapotranspiration
related: reflectance
related: relative humidity
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

centimeter
type: Concept
definition: a length unit which is equal to one hundredth of a meter or 10^[-2] m (Credit: Units of measurement ontology).
alternative label: centimetre
alternative label: cm
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: length unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

meter
type: Concept
definition: a length unit which is equal to the length of the path traveled by light in vacuum during a time interval of 1/299 792 458 of a second (Credit: Units of measurement ontology).
alternative label: m
alternative label: metre
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: length unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

micrometer
type: Concept
definition: a length unit which is equal to one millionth of a meter or 10^[-6] m (Credit: Units of measurement ontology).
alternative label: micrometre
alternative label: micron
alternative label: um
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: length unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

millimeter
type: Concept
definition: a length unit which is equal to one thousandth of a meter or 10^[-3] m (Credit: Units of measurement ontology).
alternative label: millimetre
alternative label: mm
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: length unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

nanometer
type: Concept
definition: a length unit which is equal to one thousandth of one millionth of a meter or 10^[-9] m (Credit: Units of measurement ontology).
alternative label: nanometre
alternative label: nm
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: length unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

year Common Era
type: Concept
definition: an age unit of years for the Julian and Gregorian calendars relative to the start of the present era. Times prior to the start of the present era are expressed as negative values.
alternative label: year AD
alternative label: years AD
alternative label: yr AD
alternative label: yrs AD
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: age unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

calendar year before present
type: Concept
definition: an age unit of years, calibrated to actual years if derived from radiocarbon dating, before present with present defined as 1950 Common Era. Times after 1950 CE are expressed as negative values.
alternative label: year BP
alternative label: yr BP
alternative label: yrs BP
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: age unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

per mil
type: Concept
definition: a parts per thousand unit, often used directly to refer to isotopic ratios and calculated by calculating the ratio of isotopic concentrations in a sample and in a standard, subtracting one and multiplying by one thousand.
alternative label: per mill
alternative label: per mille
alternative label: permil
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: parts per thousand
narrower: per mil AIR
narrower: per mil BSE
narrower: per mil I-CDES
narrower: per mil NBS oxalic acid
narrower: per mil NIST 3104a
narrower: per mil PDB
narrower: per mil SMOW
narrower: per mil SRM 915a
narrower: per mil SRM 951
narrower: per mil SRM 951a
narrower: per mil VPDB
narrower: per mil VSMOW
narrower: per mil VSMOW-SLAP
narrower: per mil seawater
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

parts per million
type: Concept
definition: a parts per notation unit which denotes the amount of a given substance in a total amount of 1,000,000 regardless of the units of measure used as long as they are the same or 1 part in 10^[6] (Credit: Units of measurement ontology).
alternative label: ppm
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: parts per notation unit
narrower: per meg AIR
narrower: per meg VSMOW-SLAP
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

parts per billion
type: Concept
definition: a parts per notation unit which denotes the amount of a given substance in a total amount of 1,000,000,000 regardless of the units of measure as long as they are the same or 1 part in 10^[9] (Credit: Units of measurement ontology).
alternative label: ppb
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: parts per notation unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

percent
type: Concept
definition: a concentration unit that denotes numbers as fractions of 100 (Credit: Units of measurement ontology).
alternative label: %
alternative label: per cent
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: concentration unit
narrower: mole percent
narrower: volume percent
narrower: weight percent
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

weight percent
type: Concept
definition: a percent unit that denotes the weight of a substance in a mixture as a percentage of the weight of the entire mixture.
alternative label: weight %
alternative label: weight per cent
alternative label: wt %
alternative label: wt per cent
alternative label: wt percent
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: percent
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

per mil AIR
type: Concept
definition: a per mil unit calculated using the isotopic concentration of standard air.
alternative label: per mill AIR
alternative label: per mille AIR
alternative label: permil AIR
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: per mil
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

per mil PDB
type: Concept
definition: a per mil unit calculated using the isotopic concentration of standard PeeDee belemnite.
alternative label: per mill PDB
alternative label: per mille PDB
alternative label: permil PDB
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: per mil
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

per mil VPDB
type: Concept
definition: a per mil unit calculated using the isotopic concentration of standard Vienna PeeDee belemnite.
alternative label: per mill VPDB
alternative label: per mille VPDB
alternative label: permil VPDB
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: per mil
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

per mil SMOW
type: Concept
definition: a per mil unit calculated using the isotopic concentration of Standard Mean Ocean Water.
alternative label: per mill SMOW
alternative label: per mille SMOW
alternative label: permil SMOW
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: per mil
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

per mil VSMOW
type: Concept
definition: a per mil unit calculated using the isotopic concentration of standard Vienna Standard Mean Ocean Water.
alternative label: per mill VSMOW
alternative label: per mille VSMOW
alternative label: permil VSMOW
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: per mil
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

Pocillopora sp.
type: Concept
definition: any coral that belongs to the genus Pocillopora.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: coral
narrower: Pocillopora damicornus
related: corals and sclerosponges
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

Porites sp.
type: Concept
definition: any coral that belongs to the genus Porites.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: coral
narrower: Porites astreoides
narrower: Porites australiensis
narrower: Porites evermanni
narrower: Porites lobata
narrower: Porites lutea
narrower: Porites solida
related: corals and sclerosponges
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

Acropora sp.
type: Concept
definition: any coral that belongs to the genus Acropora.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: coral
narrower: Acropora cervicornis
narrower: Acropora humilis
narrower: Acropora millepora
narrower: Acropora palmata
narrower: Acropora samoensis
related: corals and sclerosponges
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

Ceratoporella sp.
type: Concept
definition: any sclerosponge that belongs to the genus Ceratoporella.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: sclerosponge
narrower: Ceratoporella nicholsoni
related: corals and sclerosponges
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

Diploastrea sp.
type: Concept
definition: any coral that belongs to the genus Diploastrea.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: coral
narrower: Diploastrea heliopora
related: corals and sclerosponges
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

Diploria sp.
type: Concept
definition: any coral that belongs to the genus Diploria, commonly known as brain corals.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: coral
narrower: Diploria labyrinthiformis
related: corals and sclerosponges
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

Kulamanamana sp.
type: Concept
definition: any coral that belongs to the genus Kulamanamana.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: coral
narrower: Kulamanamana haumeaae
related: corals and sclerosponges
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

Montastraea sp.
type: Concept
definition: any coral that belongs to the genus Montastraea.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: coral
narrower: Montastraea cavernosa
related: corals and sclerosponges
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

Orbicella sp.
type: Concept
definition: any coral that belongs to the genus Orbicella.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: coral
narrower: Orbicella annularis
narrower: Orbicella faveolata
narrower: Orbicella franksi
related: corals and sclerosponges
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

Pavona sp.
type: Concept
definition: any coral that belongs to the genus Pavona.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: coral
narrower: Pavona clavus
narrower: Pavona gigantea
related: corals and sclerosponges
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

Platygyra sp.
type: Concept
definition: any coral that belongs to the genus Platygyra.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: coral
narrower: Platygyra daedalea
narrower: Platygyra lamellina
related: corals and sclerosponges
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

Siderastrea sp.
type: Concept
definition: any coral that belongs to the genus Siderastrea.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: coral
narrower: Siderastrea radians
narrower: Siderastrea siderea
narrower: Siderastrea stellata
related: corals and sclerosponges
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

Solenastrea sp.
type: Concept
definition: any coral that belongs to the genus Solenastrea.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: coral
narrower: Solenastrea bournoni
related: corals and sclerosponges
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

Acropora palmata
type: Concept
definition: a particular species of the Acropora genus that is commonly known as the elkhorn coral.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: Acropora sp.
related: corals and sclerosponges
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

Ceratoporella nicholsoni
type: Concept
definition: a particular species of the genus Ceratoporella.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: Ceratoporella sp.
related: corals and sclerosponges
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

Diploastrea heliopora
type: Concept
definition: a particular species of the Diploastrea genus that is commonly known as double-star coral.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: Diploastrea sp.
related: corals and sclerosponges
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

Diploria labyrinthiformis
type: Concept
definition: a particular species of the Diploria genus that is commonly known as grooved brain coral.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: Diploria sp.
related: corals and sclerosponges
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

Pseudodiploria strigosa
type: Concept
definition: a particular species of the genus Pseudodiploria that is commonly known as symmetrical brain coral.
alternative label: Diploria strigosa
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: Pseudodiploria sp.
related: corals and sclerosponges
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

Kulamanamana haumeaae
type: Concept
definition: a particular species of the genus Kulamanamana that is commonly known as Hawaiian gold coral.
alternative label: Gerardia sp.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: Kulamanamana sp.
related: corals and sclerosponges
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

Orbicella faveolata
type: Concept
definition: a particular species of the genus Orbicella that is commonly known as the mountainous star coral.
alternative label: Montastraea faveolata
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: Orbicella sp.
related: corals and sclerosponges
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

Pavona clavus
type: Concept
definition: a particular species of the genus Pavona that is commonly known as the leaf coral.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: Pavona sp.
related: corals and sclerosponges
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

Pavona gigantea
type: Concept
definition: a particular species of the genus Pavona that is commonly known as the leaf coral.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: Pavona sp.
related: corals and sclerosponges
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

Platygyra lamellina
type: Concept
definition: a particular species of the genus Platygyra that is commonly known as the lesser valley coral.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: Platygyra sp.
related: corals and sclerosponges
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

Porites astreoides
type: Concept
definition: a particular species of the genus Porites that is commonly known as the yellow porites or the mustard hill coral.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: Porites sp.
related: corals and sclerosponges
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

Porites australiensis
type: Concept
definition: a particular species of the genus Porites that is commonly known as the hump coral.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: Porites sp.
related: corals and sclerosponges
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

Porites lobata
type: Concept
definition: a particular species of the genus Porites that is commonly known as the lobe coral.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: Porites sp.
related: corals and sclerosponges
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

Porites lutea
type: Concept
definition: a particular species of the genus Porites that is commonly known as the hump coral or the pore coral.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: Porites sp.
related: corals and sclerosponges
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

Porites solida
type: Concept
definition: a particular species of the genus Porites that is commonly known as the hump coral or boulder coral.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: Porites sp.
related: corals and sclerosponges
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

Siderastrea siderea
type: Concept
definition: a particular species of the genus Siderastrea that is commonly known as the massive starlet coral.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: Siderastrea sp.
related: corals and sclerosponges
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

Solenastrea bournoni
type: Concept
definition: a particular species of the genus Solenastrea that is commonly known as the smooth star coral.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: Solenastrea sp.
related: corals and sclerosponges
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

biological material
type: Concept
definition: a material derived from a living thing.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: material
narrower: bulk biological material
narrower: organism
narrower: tissue
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

hydrologic material
type: Concept
definition: a material that consists of liquid or frozen water.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: material
narrower: bulk ice
narrower: calcifying fluid
narrower: firn
narrower: fluid inclusion
narrower: lake water
narrower: precipitation
narrower: river water
narrower: sea water
narrower: sediment pore water
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

geological material
type: Concept
definition: a material that consists of minerals, rocks, and unconsolidated materials such as soils and sediments.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: material
narrower: bulk geological material
narrower: identified mineral
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

atmospheric material
type: Concept
definition: a material derived from the atmosphere.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: material
narrower: bulk atmosphere
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

sediment
type: Concept
definition: a bulk geological material that consists of particles that settle to the bottom of a liquid, such as a lake or the ocean.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: bulk geological material
narrower: dry sediment
narrower: wet sediment
related: fire history
related: loess and paleosol
related: paleoceanography
related: paleoclimatic modeling
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

fluid inclusion
type: Concept
definition: microscopic bubbles of liquid or gas that are trapped within crystals.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: hydrologic material
related: speleothems
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

element or single-element molecule
type: Concept
definition: a measurement of a single element.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: chemical composition
narrower: actinium
narrower: aluminum
narrower: antimony
narrower: argon
narrower: arsenic
narrower: barium
narrower: beryllium
narrower: bismuth
narrower: boron
narrower: bromine
narrower: cadmium
narrower: calcium
narrower: carbon
narrower: cerium
narrower: cesium
narrower: chlorine
narrower: chromium
narrower: cobalt
narrower: copper
narrower: dysprosium
narrower: erbium
narrower: europium
narrower: fluorine
narrower: gadolinium
narrower: gallium
narrower: germanium
narrower: gold
narrower: hafnium
narrower: helium
narrower: holmium
narrower: hydrogen
narrower: iodine
narrower: iridium
narrower: iron
narrower: krypton
narrower: lanthanum
narrower: lead
narrower: lithium
narrower: lutetium
narrower: magnesium
narrower: manganese
narrower: mercury
narrower: molybdenum
narrower: neodymium
narrower: neon
narrower: nickel
narrower: niobium
narrower: nitrogen
narrower: osmium
narrower: oxygen
narrower: palladium
narrower: phosphorus
narrower: platinum
narrower: polonium
narrower: potassium
narrower: praseodymium
narrower: protactinium
narrower: rhenium
narrower: rhodium
narrower: rubidium
narrower: samarium
narrower: scandium
narrower: selenium
narrower: silicon
narrower: silver
narrower: sodium
narrower: strontium
narrower: sulfur
narrower: tantalum
narrower: technetium
narrower: tellurium
narrower: terbium
narrower: thallium
narrower: thorium
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

inorganic compound
type: Concept
definition: a compound that either does not contain carbon, is of a non-biologic origin, cannot be found or incorporated into a living organism, or is one of a small class of simple molecules containing carbon (e.g., carbon dioxide, carbon monoxide).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: compound
narrower: aluminum oxide
narrower: ammonium
narrower: barium oxide
narrower: borate ion
narrower: calcium dioxide
narrower: calcium oxide
narrower: carbon dioxide
narrower: carbon monoxide
narrower: carbonate ion
narrower: hydrogen carbonate
narrower: hydrogen peroxide
narrower: inorganic compound index
narrower: iron oxide
narrower: magnesium oxide
narrower: manganese oxide
narrower: nitrate
narrower: nitrite
narrower: nitrous oxide
narrower: phosphate
narrower: phosphorus oxide
narrower: potassium oxide
narrower: silicon dioxide
narrower: sodium oxide
narrower: strontium oxide
narrower: sulfate
narrower: sulfuric acid
narrower: titanium oxide
narrower: zirconium dioxide
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

solution property
type: Concept
definition: a chemical composition that relates to the amount of particular solutes dissolved in a solution.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: chemical composition
narrower: acidity
narrower: alkalinity
narrower: apparent oxygen utilization
narrower: aragonite saturation state
narrower: calcite saturation state
narrower: dissociation constant
narrower: ion balance
narrower: salinity
narrower: total dissolved solids
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

kilometer
type: Concept
definition: a length unit which is equal to one thousand meters or 10^[3] m.
alternative label: kilometre
alternative label: km
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: length unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

age
type: Concept
definition: the age, either directly measured or inferred, of the midpoint of a sample.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: age variable
narrower: age at sample end
narrower: age at sample start
narrower: gas age
narrower: gas age at sample end
narrower: gas age at sample start
narrower: ice age
narrower: ice age at sample end
narrower: ice age at sample start
related: borehole
related: climate forcing
related: climate reconstructions
related: corals and sclerosponges
related: fire history
related: historical
related: ice cores
related: loess and paleosol
related: paleoceanography
related: paleolimnology
related: speleothems
related: tree ring
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

depth
type: Concept
definition: the location of the midpoint of a sample measured as a distance from some datum, usually the core top.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: depth variable
narrower: depth at sample end
narrower: depth at sample start
related: borehole
related: climate forcing
related: climate reconstructions
related: corals and sclerosponges
related: fire history
related: ice cores
related: loess and paleosol
related: paleoceanography
related: paleolimnology
related: speleothems
related: tree ring
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

coral
type: Concept
definition: an identifiable organism that belongs to the kingdom Animalia, phylum Cnindaria.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: organism
narrower: Acropora sp.
narrower: Antipathes sp.
narrower: Desmophyllum sp.
narrower: Diploastrea sp.
narrower: Diploria sp.
narrower: Dipsastraea sp.
narrower: Gardinersoseris sp.
narrower: Goniopora sp.
narrower: Hydnophora sp.
narrower: Isidella sp.
narrower: Isopora sp.
narrower: Kulamanamana sp.
narrower: Montastraea sp.
narrower: Muricella sp.
narrower: Mussismilia sp.
narrower: Orbicella sp.
narrower: Pavona sp.
narrower: Platygyra sp.
narrower: Pocillopora sp.
narrower: Porites sp.
narrower: Pseudodiploria sp.
narrower: Siderastrea sp.
narrower: Solenastrea sp.
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

length unit
type: Concept
definition: a unit which is a standard measure of the distance between two points (Credit: Units of measurement ontology).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: unit
narrower: centimeter
narrower: foot
narrower: inch
narrower: kilometer
narrower: meter
narrower: micrometer
narrower: millimeter
narrower: nanometer
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

mass unit
type: Concept
definition: a unit which is a standard measure of the amount of matter/energy of a physical object (Credit: Units of measurement ontology).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: unit
narrower: gigaton
narrower: gram
narrower: kilogram
narrower: megaton
narrower: microgram
narrower: milligram
narrower: nanogram
narrower: picogram
narrower: teragram
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

time unit
type: Concept
definition: a unit which is a standard measure of the dimension in which events occur in sequence (Credit: Units of measurement ontology).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: unit
narrower: age unit
narrower: duration unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

substance unit
type: Concept
definition: a unit which is a standardized quantity of an element or compound with uniform composition, with the SI unit being the mole (Credit: Units of measurement ontology).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: unit
narrower: micromole
narrower: millimole
narrower: mole
narrower: nanomole
narrower: picomole
narrower: teramole
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

mole
type: Concept
definition: a substance unit which is equal to the amount of substance of a molecular system which contains as many elementary entities as there are atoms in 0.012 kilogram of carbon 12 (Credit: Units of measurement ontology).
alternative label: mol
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: substance unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

microgram
type: Concept
definition: a mass unit which is equal to one millionth of a gram or 10^[-6] g (Credit: Units of measurement ontology).
alternative label: ug
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: mass unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

kilogram
type: Concept
definition: a mass unit which is equal to the mass of the International Prototype Kilogram kept by the BIPM at Svres, France (Credit: Units of measurement ontology).
alternative label: kg
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: mass unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

gram
type: Concept
definition: a mass unit which is equal to one thousandth of a kilogram or 10^[-3] kg (Credit: Units of measurement ontology).
alternative label: g
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: mass unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

millimole
type: Concept
definition: a substance unit equal to a thousandth of a mol or 10^[-3] mol (Credit: Units of measurement ontology).
alternative label: mmol
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: substance unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

micromole
type: Concept
definition: a substance unit equal to a millionth of a mol or 10^[-6] mol (Credit: Units of measurement ontology).
alternative label: umol
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: substance unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

second
type: Concept
definition: a duration unit that is equal to the duration of 9 192 631 770 periods of the radiation corresponding to the transition between the two hyperfine levels of the ground state of the caesium 133 atom (Credit: Units of measurement ontology).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: duration unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

minute
type: Concept
definition: a duration unit that is equal to 60 seconds.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: duration unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

day
type: Concept
definition: a duration unit that is equal to 24 hours.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: duration unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

year
type: Concept
definition: a duration unit that is equal to 12 months which in science is taken to be equal to 365.25 days (Credit: Units of measurement ontology).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: duration unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

age unit
type: Concept
definition: a time unit that places the occurrence of an event relative to fixed reference point in time.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: time unit
narrower: billion years ago
narrower: calendar kiloyear before present
narrower: calendar year before present
narrower: day of month
narrower: day of year
narrower: hour of day
narrower: million years ago
narrower: month of year
narrower: radiocarbon kiloyear before present
narrower: radiocarbon year before present
narrower: year Common Era
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

duration unit
type: Concept
definition: a time unit that measures the duration of a period of time.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: time unit
narrower: calendar kiloyear
narrower: calendar year
narrower: day
narrower: hour
narrower: kiloyear
narrower: million year
narrower: minute
narrower: month
narrower: radiocarbon kiloyear
narrower: radiocarbon year
narrower: second
narrower: year
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

billion years ago
type: Concept
definition: an age unit of 10^[9] years before present.
alternative label: giga annum
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: age unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

million years ago
type: Concept
definition: an age unit of 10^[6] years before present.
alternative label: mega annum
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: age unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

kiloyear
type: Concept
definition: a duration unit that is equal to 10^[3] years.
alternative label: kilo annum
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: duration unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

cerium
type: Concept
definition: a chemical element with atomic number 58.
alternative label: Ce
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or single-element molecule
related: ice cores
related: paleoceanography
related: paleolimnology
related: speleothems
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

copper
type: Concept
definition: a chemical element with atomic number 29.
alternative label: Cu
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or single-element molecule
related: corals and sclerosponges
related: ice cores
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

iron
type: Concept
definition: a chemical element with atomic number 26.
alternative label: Fe
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or single-element molecule
narrower: dissolved iron
related: corals and sclerosponges
related: ice cores
related: paleoceanography
related: paleoclimatic modeling
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

lanthanum
type: Concept
definition: a chemical element with atomic number 57.
alternative label: La
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or single-element molecule
related: ice cores
related: paleoceanography
related: paleolimnology
related: speleothems
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

manganese
type: Concept
definition: a chemical element with atomic number 25.
alternative label: Mn
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or single-element molecule
related: corals and sclerosponges
related: ice cores
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

neodymium
type: Concept
definition: a chemical element with atomic number 60.
alternative label: Nd
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or single-element molecule
related: ice cores
related: paleoceanography
related: speleothems
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

praseodymium
type: Concept
definition: a chemical element with atomic number 59.
alternative label: Pr
alternative label: praeseodymium
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or single-element molecule
related: ice cores
related: paleoceanography
related: speleothems
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

strontium
type: Concept
definition: a chemical element with atomic number 38.
alternative label: Sr
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or single-element molecule
related: ice cores
related: paleoceanography
related: paleolimnology
related: speleothems
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

thorium
type: Concept
definition: a chemical element with atomic number 90.
alternative label: Th
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or single-element molecule
related: paleoceanography
related: speleothems
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

titanium
type: Concept
definition: a chemical element with atomic number 22.
alternative label: Ti
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or single-element molecule
related: ice cores
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

yttrium
type: Concept
definition: a chemical element with atomic number 39.
alternative label: Y
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or single-element molecule
related: ice cores
related: paleoceanography
related: paleolimnology
related: speleothems
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

aluminum oxide
type: Concept
definition: an inorganic compound that has the chemical formula Al2O3.
alternative label: Al2O3
alternative label: aluminum(III) oxide
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: inorganic compound
related: paleoceanography
related: paleolimnology
related: speleothems
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

iron oxide
type: Concept
definition: an inorganic compound that is any of the oxides of iron, containing iron and oxygen atoms.
alternative label: FeO
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: inorganic compound
narrower: iron(III) oxide
related: paleoceanography
related: speleothems
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

magnesium oxide
type: Concept
definition: an inorganic compound that has the chemical formula MgO.
alternative label: MgO
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: inorganic compound
related: paleoceanography
related: paleolimnology
related: speleothems
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

phosphorus pentoxide
type: Concept
definition: a phosphorus oxide with the chemical formula P4O10.
alternative label: P2O5
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: phosphorus oxide
related: paleoceanography
related: paleolimnology
related: speleothems
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

silicon dioxide
type: Concept
definition: an inorganic compound that has the chemical formula SiO2.
alternative label: SiO2
alternative label: opal
alternative label: silica
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: inorganic compound
narrower: biogenic silica
related: paleoceanography
related: paleolimnology
related: speleothems
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

zinc
type: Concept
definition: a chemical element with atomic number 30.
alternative label: Zn
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or single-element molecule
related: corals and sclerosponges
related: ice cores
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

barium/calcium
type: Concept
definition: the elemental ratio of barium to calcium.
alternative label: Ba/Ca
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or compound ratio
related: corals and sclerosponges
related: paleoceanography
related: paleolimnology
related: speleothems
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

boron/calcium
type: Concept
definition: the elemental ratio of boron to calcium.
alternative label: B/Ca
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or compound ratio
related: corals and sclerosponges
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

delta 11B
type: Concept
definition: the ratio of two isotopes of boron, 11B/10B, in a sample compared to that of a standard, typically NIST SRM 951, as in: ((11B/10B sample)/(11B/10B standard) - 1) x 1000.
alternative label: d11B
alternative label: delta B11
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: isotope ratio
related: corals and sclerosponges
related: instrumental
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

delta 13C
type: Concept
definition: the ratio of two isotopes of carbon, 13C/12C, in a sample compared to that of a standard, typically the Pee Dee Belemnite, as in: ((13C/12C sample)/(13C/12C standard) - 1) x 1000.
alternative label: d13C
alternative label: delta C13
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: isotope ratio
related: climate reconstructions
related: corals and sclerosponges
related: fire history
related: ice cores
related: instrumental
related: loess and paleosol
related: paleoceanography
related: paleoclimatic modeling
related: paleolimnology
related: speleothems
related: tree ring
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

Delta 14C
type: Concept
definition: the ratio of two isotopes of carbon, 14C/12C, in a sample compared to that of a standard, typically 19th century wood, as in: ((14C/12C sample)/(14C/12C standard) - 1) x 1000.
alternative label: D14C
alternative label: Delta C14
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: isotope ratio
related: corals and sclerosponges
related: instrumental
related: paleoceanography
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

delta 15N
type: Concept
definition: the ratio of two isotopes of nitrogen, 15N/14N, in a sample compared to that of a standard, typically modern air ratios, as in: ((15N/14N sample)/(15N/14N standard) - 1) x 1000.
alternative label: d15N
alternative label: delta N15
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: isotope ratio
narrower: delta 15N excess
related: corals and sclerosponges
related: fire history
related: ice cores
related: instrumental
related: paleoceanography
related: paleoclimatic modeling
related: paleolimnology
related: tree ring
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

delta 18O
type: Concept
definition: the ratio of two isotopes of oxygen, 18O/16O, in a sample compared to that of a standard, typically either Pee Dee Belemnite or standard mean ocean water, as in: ((18O/16O sample)/(18O/16O standard) - 1) x 1000.
alternative label: d18O
alternative label: delta O18
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: isotope ratio
related: climate reconstructions
related: corals and sclerosponges
related: ice cores
related: instrumental
related: loess and paleosol
related: paleoceanography
related: paleoclimatic modeling
related: paleolimnology
related: speleothems
related: tree ring
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

delta 2H
type: Concept
definition: the ratio of two isotopes of hydrogen, 2H/1H, in a sample compared to that of a standard, typically standard mean ocean water, as in: ((2H/1H sample)/(2H/1H standard) - 1) x 1000.
alternative label: d2H
alternative label: dD
alternative label: delta D
alternative label: delta H2
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: isotope ratio
narrower: deuterium excess
related: climate reconstructions
related: ice cores
related: instrumental
related: loess and paleosol
related: paleoceanography
related: paleolimnology
related: speleothems
related: tree ring
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

lanthanum/cerium
type: Concept
definition: the elemental ratio of lanthanum to cerium.
alternative label: La/Ce
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or compound ratio
related: speleothems
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

lanthanum/thorium
type: Concept
definition: the elemental ratio of lanthanum to thorium.
alternative label: La/Th
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or compound ratio
related: speleothems
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

magnesium/calcium
type: Concept
definition: the elemental ratio of magnesium to calcium.
alternative label: Mg/Ca
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or compound ratio
related: corals and sclerosponges
related: paleoceanography
related: paleolimnology
related: speleothems
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

strontium/calcium
type: Concept
definition: the elemental ratio of strontium to calcium.
alternative label: Sr/Ca
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or compound ratio
related: climate reconstructions
related: corals and sclerosponges
related: paleoceanography
related: paleolimnology
related: speleothems
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

uranium/calcium
type: Concept
definition: the elemental ratio of uranium to calcium.
alternative label: U/Ca
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or compound ratio
related: corals and sclerosponges
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

computational method
type: Concept
definition: an analysis method that applies mathematical techniques to numerical data.
alternative label: mathematical methods
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: method
narrower: numerical simulation
narrower: statistical analysis method
narrower: tree ring chronology method
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

field method
type: Concept
definition: research procedures and instrumental means to measure, collect data and samples, and observe in the natural areas where the materials, phenomena, structures, or species being studied occur (Credit: USGS thesaurus).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: method
narrower: borehole logging
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

laboratory method
type: Concept
definition: experimental techniques to analyze and test samples in a place equipped and designed for the work (Credit: USGS thesaurus).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: method
narrower: barometric method
narrower: carbon coulometry
narrower: chromatography
narrower: densitometry
narrower: diffraction and scattering method
narrower: electrical conductivity measurement
narrower: elemental analysis
narrower: image analysis
narrower: magnetic susceptibility measurement
narrower: microscopy
narrower: particle size analysis
narrower: pyrolysis
narrower: sampling method
narrower: spectroscopy
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

numerical simulation
type: Concept
definition: a computational method that employs deterministic, mathematical expressions to represent a simplified view of real-world systems.
alternative label: numerical methods
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: computational method
narrower: forward model
narrower: inverse model
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

statistical analysis method
type: Concept
definition: a computational method that collects, analyzes, presents and/or interprets numerical data generally within a probabilistic framework.
alternative label: geostatistics
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: computational method
narrower: Bayesian inference
narrower: Monte Carlo simulation
narrower: analogue method
narrower: artificial neural network
narrower: compositing method
narrower: principal component analysis
narrower: regression analysis
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

regression analysis
type: Concept
definition: a statistical analysis method that is based on the relationships of two or more related variables, allowing prediction of values of one variable when values of any other related variable(s) are given.
alternative label: correlation
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: statistical analysis method
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

chromatography
type: Concept
definition: a laboratory method that is used to separate or partition the components of a gaseous or liquid mixture by differences in absorption rates during flow around or over surface absorbents such as columns of silica, filter papers, or gels (Credit: Chemical Methods Ontology).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: laboratory method
narrower: gas chromatography
narrower: ion chromatography
narrower: liquid chromatography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

gas chromatography
type: Concept
definition: column chromatography where the mobile phase is a gas (Credit: Chemical Methods Ontology).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: chromatography
narrower: gas chromatography - electron capture detection
narrower: gas chromatography - flame ionization detection
narrower: gas chromatography - thermal conductivity detection
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

liquid chromatography
type: Concept
definition: column chromatography where the mobile phase is a liquid (Credit: Chemical Methods Ontology).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: chromatography
narrower: high-performance liquid chromatography
narrower: ultra-high-performance liquid chromatography
created: 2018-03-26 00:00:00.0
modified: 2021-04-13 15:02:18.0

particle size analysis
type: Concept
definition: a laboratory method that counts or sizes particles in a sample.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: laboratory method
narrower: electric sensing particle size analysis
narrower: laser particle size analysis
narrower: x-ray particle size analysis
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

geological material
type: Concept
definition: minerals, rocks, and unconsolidated materials such as soils and sediments.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: what
narrower: bulk geological material
narrower: identified mineral
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

air temperature
type: Concept
definition: the mean temperature of air at a level of the atmosphere.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: temperature
narrower: surface air temperature
related: climate reconstructions
related: historical
related: ice cores
related: instrumental
related: paleoceanography
related: paleoclimatic modeling
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

sea surface temperature
type: Concept
definition: the mean temperature of the ocean surface.
alternative label: sst
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: sea water temperature
related: climate reconstructions
related: corals and sclerosponges
related: historical
related: instrumental
related: paleoceanography
related: paleoclimatic modeling
related: tree ring
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

biological material
type: Concept
definition: measurements of cells or collections of cells that partially or completely compose an organism or group of organisms.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: what
narrower: bulk biological material
narrower: cell
narrower: organism
narrower: tissue
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

latitude
type: Concept
definition: sampling metadata that identifies the latitude at which a sample was collected or a reconstruction was generated.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: sampling metadata
related: borehole
related: climate forcing
related: climate reconstructions
related: corals and sclerosponges
related: fire history
related: historical
related: ice cores
related: instrumental
related: loess and paleosol
related: paleoceanography
related: paleoclimatic modeling
related: paleolimnology
related: speleothems
related: tree ring
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

longitude
type: Concept
definition: sampling metadata that describes the longitude at which a sample was collected or a reconstruction was generated.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: sampling metadata
related: borehole
related: climate forcing
related: climate reconstructions
related: corals and sclerosponges
related: fire history
related: historical
related: ice cores
related: instrumental
related: loess and paleosol
related: paleoceanography
related: paleoclimatic modeling
related: paleolimnology
related: speleothems
related: tree ring
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

degree north
type: Concept
definition: a degree unit used to designate a geographic latitude coordinate northward of the equator.
alternative label: deg N
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: degree
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

degree south
type: Concept
definition: a degree unit used to designate a geographic latitude coordinate southward of the equator.
alternative label: deg S
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: degree
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

degree west
type: Concept
definition: a degree unit used to designate a geographic longitude coordinate westward of the prime meridian.
alternative label: deg W
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: degree
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

degree east
type: Concept
definition: a degree unit used to designate a geographic longitude coordinate eastward of the prime meridian.
alternative label: deg E
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: degree
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

inductively-coupled plasma atomic emission spectroscopy
type: Concept
definition: atomic emission spectrometry in which a plasma generated by electromagnetic induction is used as the excitation source (Credit: Chemical Methods Ontology).
alternative label: ICP-AES
alternative label: ICP-OES
alternative label: inductively-coupled plasma optical emission spectrometry
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: atomic spectroscopy
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

inductively-coupled plasma mass spectrometry
type: Concept
definition: mass spectrometry in which the plasma has been generated by electromagnetic induction (Credit: Chemical Methods Ontology).
alternative label: ICP-MS
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: mass spectrometry
narrower: inductively-coupled plasma sector field mass spectrometry
narrower: multiple collector inductively-coupled plasma mass spectrometry
narrower: single collector inductively-coupled plasma mass spectrometry
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

isotope ratio mass spectrometry
type: Concept
definition: mass spectrometry in which the relative abundance of isotopes in a sample is determined (Credit: Chemical Methods Ontology).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: mass spectrometry
narrower: continuous-flow isotope ratio mass spectrometry
narrower: dual-inlet isotope ratio mass spectrometry
narrower: isotope dilution mass spectrometry
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

accelerator mass spectrometry
type: Concept
definition: mass spectrometry in which the sample is ionized and the ions are accelerated to very high kinetic energies (Credit: Chemical Methods Ontology).
alternative label: AMS
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: mass spectrometry
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

calcite
type: Concept
definition: a calcium carbonate with rhombohedral crystal structure.
alternative label: CaCO3
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: calcium carbonate
related: corals and sclerosponges
related: paleoceanography
related: paleoclimatic modeling
related: paleolimnology
related: speleothems
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

aragonite
type: Concept
definition: a calcium carbonate with orthorhombic crystal structure.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: calcium carbonate
related: corals and sclerosponges
related: paleoceanography
related: paleoclimatic modeling
related: paleolimnology
related: speleothems
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

one standard error
type: Concept
definition: a measure of how far the sample mean is expected to deviate from its actual value calculated as the sample standard deviation divided by the square root of the sample size. This value is approached by a 68% confidence interval margin of error at large sample sizes.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: standard error
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

two standard error
type: Concept
definition: a measure of how far the sample mean is expected to deviate from its actual value calculated as two times the sample standard deviation divided by the square root of the sample size. This value is approached by a 95% confidence interval margin of error at large sample sizes.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: standard error
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

95% confidence interval upper bound
type: Concept
definition: the upper (maximum) bound of the confidence interval that captures the true value 95% of the time.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: confidence interval
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

95% confidence interval lower bound
type: Concept
definition: the lower (minimum) bound of the confidence interval that captures the true value 95% of the time.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: confidence interval
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

90% confidence interval upper bound
type: Concept
definition: the upper (maximum) bound of the confidence interval that captures the true value 90% of the time.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: confidence interval
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

90% confidence interval lower bound
type: Concept
definition: the lower (minimum) bound of the confidence interval that captures the true value 90% of the time.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: confidence interval
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

99% confidence interval upper bound
type: Concept
definition: the upper (maximum) bound of the confidence interval that captures the true value 99% of the time.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: confidence interval
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

99% confidence interval lower bound
type: Concept
definition: the lower (minimum) bound of the confidence interval that captures the true value 99% of the time.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: confidence interval
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

97.5% confidence interval upper bound
type: Concept
definition: the upper (maximum) bound of the confidence interval that captures the true value 97.5% of the time.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: confidence interval
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

97.5% confidence interval lower bound
type: Concept
definition: the lower (minimum) bound of the confidence interval that captures the true value 97.5% of the time.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: confidence interval
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

one standard deviation
type: Concept
definition: a measure that is defined as the square root of the sum of the square difference of individual observations from the mean divided by the total number of observations. If the data is distributed approximately normally and the sample size is large, about 68% of the observations will fall within one standard deviation of the mean.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: standard deviation
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

two standard deviations
type: Concept
definition: a measure that is defined as two times the square root of the sum of the square difference of individual observations from the mean divided by the total number of observations. If the data is distributed approximately normally and the sample size is large, about 95% of the observations will fall within two standard deviations of the mean.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: standard deviation
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

standard deviation unit
type: Concept
definition: a mathematical unit that describes how many standard deviations away from the mean a value is.
alternative label: sd units
alternative label: z score
alternative label: z-score
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: mathematical unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

collection elevation
type: Concept
definition: sampling metadata that identifies the elevation, either above or below sea level, at which a sample was collected or a reconstruction was generated.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: sampling metadata
related: borehole
related: climate forcing
related: climate reconstructions
related: corals and sclerosponges
related: fire history
related: historical
related: ice cores
related: instrumental
related: loess and paleosol
related: paleoceanography
related: paleoclimatic modeling
related: paleolimnology
related: speleothems
related: tree ring
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

growth rate
type: Concept
definition: a formation rate that is the rate of linear growth of a deposit (e.g., speleothem, mollusk shell), sometimes calculated from the width of an annual growth band.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: formation rate
related: paleoceanography
related: speleothems
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

grayscale
type: Concept
definition: reflectance that is quantified only according to intensity, or the amount of light, with low values indicating black and high values indicating white.
alternative label: greyscale
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: reflectance
related: paleoceanography
related: paleolimnology
related: speleothems
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

Arctic Oscillation Index
type: Concept
definition: a circulation index that is calculated from non-seasonal sea level pressure variations north of 20 degrees North latitude.
alternative label: AO
alternative label: Northern Annular Mode
alternative label: Northern Hemisphere Annular Mode
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: circulation index
related: climate reconstructions
related: instrumental
related: tree ring
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

North Atlantic Oscillation Index
type: Concept
definition: a circulation index that is calculated from the sea level pressure difference between the subtropical (Azores) high and the subpolar low in the North Atlantic.
alternative label: NAO
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: circulation index
related: climate reconstructions
related: corals and sclerosponges
related: historical
related: ice cores
related: instrumental
related: paleolimnology
related: speleothems
related: tree ring
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

precipitation
type: Concept
definition: the hydroclimatic rate of rain, snow, sleet or hail that falls to the ground.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: hydroclimate rate
narrower: convective precipitation
narrower: large-scale precipitation
narrower: rainfall
narrower: snowfall
related: climate reconstructions
related: corals and sclerosponges
related: historical
related: instrumental
related: paleoceanography
related: paleoclimatic modeling
related: paleolimnology
related: speleothems
related: tree ring
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

per mil SRM 951
type: Concept
definition: a per mil unit calculated using the isotopic concentration of standard NIST SRM 951.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: per mil
created: 2018-03-26 00:00:00.0
modified: 2021-07-23 18:27:44.0

per mil NBS oxalic acid
type: Concept
definition: a per mil unit calculated using the isotopic concentration of standard NBS oxalic acid.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: per mil
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

extension rate
type: Concept
definition: a formation rate that is the rate of linear growth in corals and related species, usually calculated from the width of an annual growth band.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: formation rate
related: corals and sclerosponges
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

luminescence
type: Concept
definition: an electromagnetic property that measures the emission of light by a substance not resulting from heat.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: electromagnetic property
narrower: fluorescence
related: corals and sclerosponges
related: speleothems
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

Dipole Mode Index
type: Concept
definition: a circulation index that measures the anomalous zonal sea surface temperature gradient across the equatorial Indian Ocean and that is defined as the difference in anomalies between a western (60-80E, 10S-10N) and eastern (90-110E, 10S-0) box.
alternative label: DMI
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: circulation index
related: climate reconstructions
related: corals and sclerosponges
related: instrumental
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

number of samples
type: Concept
definition: sampling metadata that quantifies the number of samples or measurements that were combined, either physically or statistically, into a resultant data series.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: sampling metadata
related: borehole
related: climate forcing
related: climate reconstructions
related: corals and sclerosponges
related: fire history
related: historical
related: ice cores
related: instrumental
related: loess and paleosol
related: paleoceanography
related: paleolimnology
related: speleothems
related: tree ring
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

pH
type: Concept
definition: a measure of acidity that is calculated as the negative logarithm of the hydrogen ion concentration.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: acidity
related: climate reconstructions
related: corals and sclerosponges
related: ice cores
related: instrumental
related: paleoceanography
related: paleoclimatic modeling
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

parts per trillion
type: Concept
definition: a parts per notation unit which denotes the amount of a given substance in a total amount of 1,000,000,000 regardless of the units of measure used as long as they are the same or 1 part in 10^[12] (Credit: Units of measurement ontology).
alternative label: ppt
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: parts per notation unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

thermal ionization mass spectrometry
type: Concept
definition: mass spectrometry in which ionization is achieved by loading the sample onto a heated filament (Credit: Chemical Methods Ontology).
alternative label: TIMS
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: mass spectrometry
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

microscopy
type: Concept
definition: a laboratory method in which a microscope is used to view a small object (or specimen) by producing a magnified image (Credit: Chemical Methods Ontology).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: laboratory method
narrower: electron microscopy
narrower: optical microscopy
narrower: scanning probe microscopy
narrower: ultraviolet microscopy
narrower: x-ray microscopy
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

optical microscopy
type: Concept
definition: microscopy in which the specimen is illuminated with visible light and a system of lenses is used to produce an image (Credit: Chemical Methods Ontology).
alternative label: transmitted light microscopy
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: microscopy
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

electron microscopy
type: Concept
definition: microscopy in which the specimen is bombarded with a finely focused (<10 nm diameter) electron beam with an acceleration voltage 50-150 kV under vacuum. The interaction of the electrons with the specimen produces transmitted, secondary, backscattered and diffracted electrons and characteristic X-rays which are detected (Credit: Chemical Methods Ontology).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: microscopy
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

scanning probe microscopy
type: Concept
definition: microscopy which uses a probe to scan the surface of the specimen and measure some form of interaction between surface and probe. An image of the surface is obtained by mechanically moving the probe in a raster scan of the specimen, line by line, and recording the probe-surface interaction as a function of position. A feedback loop is used to maintain a fixed relationship between the probe and surface during scanning (Credit: Chemical Methods Ontology).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: microscopy
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

ultraviolet microscopy
type: Concept
definition: microscopy that uses ultraviolet light to generate a magnified image of a sample.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: microscopy
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

x-ray microscopy
type: Concept
definition: microscopy in which soft X-rays (100-1000 eV) are directed at the specimen, and the difference in absorption of the X-rays by different elements (mainly O and C) produces an image (Credit: Chemical Methods Ontology).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: microscopy
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

spectroscopy
type: Concept
definition: a laboratory method that involves the interaction of a sample with radiation or particles for measurement or detection (Credit: Chemical Methods Ontology).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: laboratory method
narrower: beta-particle detection
narrower: electronic spectroscopy
narrower: laser spectroscopy
narrower: luminescence spectroscopy
narrower: mass spectrometry
narrower: vibrational spectroscopy
narrower: x-ray spectroscopy
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

fluorescence spectroscopy
type: Concept
definition: spectroscopy in which the intensity of the fluorescence emitted by molecules excited by ultraviolet light is detected as a function of wavelength or time (Credit: Chemical Methods Ontology).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: luminescence spectroscopy
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

image analysis
type: Concept
definition: a laboratory method that involves analyzing images that were made from a material using some form of electromagnetic radiation.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: laboratory method
narrower: computed tomography
narrower: x-radiography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

smoothed
type: Concept
definition: a data transformation that involves processing to remove fine-scale features while retaining larger-scale patterns.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: detail
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

averaged
type: Concept
definition: a data transformation that involves averaging multiple values to obtain a mean value, often in the case of replicate analyses.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: detail
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

filtered
type: Concept
definition: a data transformation that involves removing selected frequencies from a time series.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: detail
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

normalized
type: Concept
definition: a data transformation that involves subtracting the long-term mean from a time series and then dividing by the series' standard deviation.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: detail
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

element or compound ratio
type: Concept
definition: a chemical composition that is the ratio of elements or of compounds.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: chemical composition
narrower: aluminum/calcium
narrower: aluminum/titanium
narrower: barium/aluminum
narrower: barium/calcium
narrower: barium/iron
narrower: barium/titanium
narrower: boron/calcium
narrower: boron/magnesium
narrower: bromine/silicon
narrower: cadmium/calcium
narrower: calcium/iron
narrower: calcium/potassium
narrower: calcium/strontium
narrower: calcium/titanium
narrower: carbon/nitrogen
narrower: carbon/phosphorus
narrower: carbon/sulfur
narrower: carbonate/organic carbon
narrower: chlorine/potassium
narrower: cobalt/calcium
narrower: copper/calcium
narrower: delta Ar/N2
narrower: delta CO2/N2
narrower: delta O2/Ar
narrower: delta O2/N2
narrower: germanium/silicon
narrower: iron/aluminum
narrower: iron/calcium
narrower: iron/manganese
narrower: iron/potassium
narrower: iron/titanium
narrower: lanthanum/cerium
narrower: lanthanum/thorium
narrower: lead/barium
narrower: lead/calcium
narrower: lead/titanium
narrower: lead/zirconium
narrower: lithium/calcium
narrower: lithium/magnesium
narrower: magnesium/aluminum
narrower: magnesium/calcium
narrower: magnesium/lithium
narrower: manganese/aluminum
narrower: manganese/calcium
narrower: manganese/iron
narrower: manganese/titanium
narrower: molybdenum/aluminum
narrower: molybdenum/calcium
narrower: neodymium/calcium
narrower: nickel/calcium
narrower: niobium/titanium
narrower: nitrogen/phosphorus
narrower: nitrogen/sulfur
narrower: phosphorus/aluminum
narrower: phosphorus/calcium
narrower: phosphorus/titanium
narrower: potassium/aluminum
narrower: potassium/titanium
narrower: rubidium/calcium
narrower: silicon dioxide/organic carbon
narrower: silicon dioxide/phosphorus
narrower: silicon/aluminum
narrower: silicon/potassium
narrower: silicon/strontium
narrower: silicon/titanium
narrower: silver/calcium
narrower: sodium/calcium
narrower: strontium-uranium
narrower: strontium/calcium
narrower: strontium/potassium
narrower: strontium/titanium
narrower: sulfur/calcium
narrower: sulfur/organic carbon
narrower: sulfur/potassium
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

isotope ratio
type: Concept
definition: the ratio of one isotope compared to another isotope.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: isotope
narrower: 129Xe/40Ar
narrower: 129Xe/84Kr
narrower: 132Xe/129Xe
narrower: 132Xe/36Ar
narrower: 132Xe/40Ar
narrower: 132Xe/84Kr
narrower: 134Xe/129Xe
narrower: 136Xe/129Xe
narrower: 143Nd/144Nd
narrower: 147Sm/144Nd
narrower: 14C dead carbon proportion
narrower: 14C fraction modern
narrower: 14CO/(14CO+14CO2)
narrower: 187Os/188Os
narrower: 187Re/188Os
narrower: 206Pb/204Pb
narrower: 206Pb/207Pb
narrower: 207Pb/204Pb
narrower: 207Pb/206Pb
narrower: 208Pb/204Pb
narrower: 208Pb/206Pb
narrower: 208Pb/207Pb
narrower: 230Th/232Th
narrower: 230Th/238U
narrower: 231Pa/230Th
narrower: 238U/232Th
narrower: 3He/4He
narrower: 40Ar/36Ar
narrower: 46Ca/43Ca
narrower: 84Kr/36Ar
narrower: 84Kr/40Ar
narrower: 86Kr/84Kr
narrower: 87Rb/86Sr
narrower: 87Sr/86Sr
narrower: Delta 14C
narrower: Delta 47
narrower: Delta 48
narrower: delta 11B
narrower: delta 138/134Ba
narrower: delta 13C
narrower: delta 15N
narrower: delta 17O
narrower: delta 18O
narrower: delta 234U
narrower: delta 29Si
narrower: delta 2H
narrower: delta 30Si
narrower: delta 33S
narrower: delta 34S
narrower: delta 36S
narrower: delta 40Ar
narrower: delta 44Ca
narrower: delta 87Sr
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

electromagnetic property
type: Concept
definition: properties of a material that relate to its emission of or interaction with electromagnetic radiation.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: what
narrower: absorbance
narrower: beta activity
narrower: gamma radiation
narrower: luminescence
narrower: reflectance
narrower: transmittance
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

formation property
type: Concept
definition: processes, phenomena, and quantities that relate to or describe the formation of a physical sample.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: what
narrower: event layer
narrower: formation rate
narrower: horizontal displacement
narrower: lock-in depth
narrower: melt
narrower: pith offset
narrower: provenance
narrower: thinning function
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

formation rate
type: Concept
definition: a formation property that quantifies the rate at which a deposit accumulated or grew through time.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: formation property
narrower: accumulation rate
narrower: calcification rate
narrower: extension rate
narrower: growth rate
narrower: sedimentation rate
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

layer thickness
type: Concept
definition: a measure of raw, or true, ice layer thickness, i.e. uncorrected for compaction and flow.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: thickness
related: ice cores
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

volume
type: Concept
definition: a physical property that is a measure of the three-dimensional space filled by a sample.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: physical property
related: fire history
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

accumulation rate
type: Concept
definition: a formation rate that is the rate of accumulation of a bulk archive material (e.g., sediment, ice, etc).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: formation rate
related: ice cores
related: loess and paleosol
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

methane
type: Concept
definition: an alkane that has the formula CH4.
alternative label: CH4
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: n-alkane
related: ice cores
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

mathematical unit
type: Concept
definition: a unit that is a standard measure of a mathematical quantity.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: unit
narrower: percent per nanometer
narrower: standard deviation unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

dimensionless
type: Concept
definition: a unit that is a standard measure of physical quantity consisting of only a numerical number without any units (Credit: Units of measurement ontology).
alternative label: fraction of modern activity
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: unit
narrower: activity ratio
narrower: atomic ratio
narrower: count
narrower: dimensionless (CGS system)
narrower: dimensionless (SI system)
narrower: fraction
narrower: relative unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

parts per notation unit
type: Concept
definition: a concentration unit which describes the amount of one substance in another. It is the ratio of the amount of the substance of interest to the amount of that substance plus the amount of the substance (Credit: Units of measurement ontology).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: concentration unit
narrower: epsilon unit
narrower: parts per billion
narrower: parts per million
narrower: parts per quadrillion
narrower: parts per thousand
narrower: parts per trillion
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

charcoal
type: Concept
definition: a bulk biological material that consists of any black-colored plant-derived material that has had its chemical composition and structure altered as a result of heating in a fire, and retains recognizable anatomic structure of the plant material, even if only in a fragmentary form (Credit: Smol et al. 2001 Tracking Environmental Change Using Lake Sediments).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: bulk biological material
related: fire history
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

dimensionless (CGS system)
type: Concept
definition: a dimensionless measure of volume magnetic susceptibility that results from values of magnetization and magnetic field strength in centimeter-gram-second units, i.e., electromagnetic units. The dimensionless cgs value of volume magnetic susceptibility can be multiplied by 4*pi to generate the dimensionless SI value.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: dimensionless
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

milligram
type: Concept
definition: a mass unit which is equal to one thousandth of a gram or 10^[-3] g (Credit: Units of measurement ontology).
alternative label: mg
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: mass unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

raw
type: Concept
definition: no data transformations or alterations were performed.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: detail
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

corrected
type: Concept
definition: a data transformation that involves correcting one or more values in a time series for known, often non-climatic, factors. These factors include, for example, changes in ice volume through time, the Suess effect, and biological offsets.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: detail
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

anomalized
type: Concept
definition: a data transformation that involves subtracting a long-term mean value from all time series values.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: detail
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

interpolated
type: Concept
definition: a data transformation that involves calculating values between sampling points in the time series.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: detail
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

detrended
type: Concept
definition: a data transformation that involves subtracting the long-term trend from a time series.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: detail
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

composited
type: Concept
definition: a data transformation that involves combining multiple time series into one, often by normalizing each and then averaging, although different methods exist.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: detail
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

density
type: Concept
definition: a physical property that quantifies the compactness of a substance.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: physical property
narrower: earlywood density
narrower: latewood density
narrower: maximum density
narrower: minimum density
narrower: sigma-t
narrower: sigma-theta
narrower: total ring density
related: climate reconstructions
related: corals and sclerosponges
related: fire history
related: ice cores
related: instrumental
related: loess and paleosol
related: paleoceanography
related: paleolimnology
related: tree ring
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

tree ring standardized growth index
type: Concept
definition: a proxy composite that is generated from multiple tree ring records, generally by statistically removing trends specific to individual trees and by combining into one index.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: proxy composite
related: paleoclimatic modeling
related: tree ring
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

minimum density
type: Concept
definition: the single smallest value for wood density obtained for a particular annual growth ring in a tree.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: density
related: tree ring
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

maximum density
type: Concept
definition: the single largest value for wood density obtained for a particular annual growth ring in a tree.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: density
related: tree ring
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

earlywood
type: Concept
definition: wood that formed early in the growing season and that tends to consist of large and thin-walled cells.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: wood
related: tree ring
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

latewood
type: Concept
definition: wood that formed late in the growing season and that tends to consist of small and thick-walled cells.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: wood
related: tree ring
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

alpha cellulose
type: Concept
definition: one of three classes of cellulose, and the one that has the highest degree of polymerization.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: cellulose
narrower: earlywood alpha cellulose
narrower: latewood alpha cellulose
related: paleoclimatic modeling
related: tree ring
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

cellulose
type: Concept
definition: an organooxygen compound with the general formula (C6H10O5)n and that is an important structural component of the cell walls of green plants.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: carbohydrate
narrower: alpha cellulose
narrower: earlywood cellulose
narrower: latewood cellulose
related: paleolimnology
related: tree ring
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

wood
type: Concept
definition: a porous and fibrous structural tissue that is found in the stems and roots of trees and other woody plants (Credit: Wikipedia).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: tissue
narrower: earlywood
narrower: latewood
related: tree ring
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

carbonate
type: Concept
definition: an identified mineral characterized by a fundamental anionic structure of CO3(2-) (Credit: Dictionary of Geological Terms).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: identified mineral
narrower: ankerite
narrower: calcium carbonate
narrower: cebaite
narrower: dolomite
narrower: rhodochrosite
narrower: siderite
related: corals and sclerosponges
related: fire history
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

volume magnetic susceptibility
type: Concept
definition: the magnetic susceptibility of a material per unit volume. This is a dimensionless quantity that relates magnetization per unit volume to the strength of the magnetic field, which both have units of ampere per meter.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: magnetic susceptibility
related: fire history
related: loess and paleosol
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

mass magnetic susceptibility
type: Concept
definition: the magnetic susceptibility of a material per unit mass. This quantity has units of cubic meter per kilogram in SI units and cubic centimeter per gram in CGS units. It is equal to the volume magnetic susceptibility divided by the density of the material.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: magnetic susceptibility
related: fire history
related: loess and paleosol
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

loss on ignition
type: Concept
definition: pyrolysis that involves strongly heating ('igniting') a sample of material at a specified temperature, allowing volatile substances to escape, until its mass ceases to change. This may be done in air, or in some other reactive or inert atmosphere (Credit: Wikipedia).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: pyrolysis
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

count
type: Concept
definition: a dimensionless unit that denotes a simple count of things (Credit: Units of measurement ontology).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: dimensionless
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

differenced
type: Concept
definition: a data transformation that involves subtracting a value or a time series from another time series.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: detail
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

unspecified error
type: Concept
definition: a measurement of error without explanation of its source or significance.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: error
narrower: unspecified error lower bound
narrower: unspecified error upper bound
narrower: unspecified margin of error
created: 2018-03-26 00:00:00.0
modified: 2020-07-31 14:18:03.0

99% confidence interval margin of error
type: Concept
definition: the value, that when added to and subtracted from the mean estimate, creates a confidence interval that captures the true value 99% of the time.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: confidence interval
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

95% confidence interval margin of error
type: Concept
definition: the value, that when added to and subtracted from the mean estimate, creates a confidence interval that captures the true value 95% of the time.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: confidence interval
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

90% confidence interval margin of error
type: Concept
definition: the value, that when added to and subtracted from the mean estimate, creates a confidence interval that captures the true value 90% of the time.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: confidence interval
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

97.5% confidence interval margin of error
type: Concept
definition: the value, that when added to and subtracted from the mean estimate, creates a confidence interval that captures the true value 97.5% of the time.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: confidence interval
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

Acropora cervicornis
type: Concept
definition: a particular species of the Acropora genus that is commonly known as the staghorn coral.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: Acropora sp.
related: corals and sclerosponges
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

Antipathes sp.
type: Concept
definition: any coral that belongs to the genus Antipathes, commonly known as black coral.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: coral
related: corals and sclerosponges
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

Astrosclera sp.
type: Concept
definition: any sclerosponge that belongs to the genus Astrosclera.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: sclerosponge
narrower: Astrosclera willeyana
related: corals and sclerosponges
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

Astrosclera willeyana
type: Concept
definition: a particular species of the genus Astrosclera.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: Astrosclera sp.
related: corals and sclerosponges
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

Dipsastraea sp.
type: Concept
definition: any coral that belongs to the genus Dipsastraea.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: coral
narrower: Dipsastraea speciosa
related: corals and sclerosponges
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

Dipsastraea speciosa
type: Concept
definition: a particular species of the genus Dipsastraea that is commonly known as knob coral.
alternative label: Astraea speciosa
alternative label: Favia speciosa
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: Dipsastraea sp.
related: corals and sclerosponges
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

Gardinersoseris sp.
type: Concept
definition: any coral that belongs to the genus Gardinerososeris.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: coral
narrower: Gardinersoseris planulata
related: corals and sclerosponges
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

Gardinersoseris planulata
type: Concept
definition: a particular species of the genus Gardinersoseris that is commonly known as Gardiner's coral.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: Gardinersoseris sp.
related: corals and sclerosponges
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

Hydnophora sp.
type: Concept
definition: any coral that belongs to the genus Hydnophora.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: coral
narrower: Hydnophora microconos
related: corals and sclerosponges
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

Hydnophora microconos
type: Concept
definition: a particular species of the genus Hydnophora that is commonly known as spine coral.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: Hydnophora sp.
related: corals and sclerosponges
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

Montastraea cavernosa
type: Concept
definition: a particular species of the genus Montastraea that is commonly known as great star coral or false knob coral.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: Montastraea sp.
related: corals and sclerosponges
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

Muricella sp.
type: Concept
definition: any coral that belongs to the genus Muricella.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: coral
related: corals and sclerosponges
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

Mussismilia sp.
type: Concept
definition: any coral that belongs to the genus Mussismilia.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: coral
narrower: Mussismilia braziliensis
related: corals and sclerosponges
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

Mussismilia braziliensis
type: Concept
definition: a particular species of the genus Mussismilia.
alternative label: Acanthastraea braziliensis
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: Mussismilia sp.
related: corals and sclerosponges
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

Platygyra daedalea
type: Concept
definition: a particular species of the genus Platygyra that is commonly known as the lesser valley coral.
alternative label: Platygyra rustica
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: Platygyra sp.
related: corals and sclerosponges
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

Siderastrea radians
type: Concept
definition: a particular species of the genus Siderastrea that is commonly known as the lesser starlet coral.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: Siderastrea sp.
related: corals and sclerosponges
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

amino acid
type: Concept
definition: an organooxygen compound that contains one or more amino groups of NH2.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: organooxygen compound
narrower: alanine
narrower: arginine
narrower: asparagine
narrower: aspartic acid
narrower: cysteine
narrower: glutamic acid
narrower: glutamine
narrower: glycine
narrower: histidine
narrower: isoleucine
narrower: leucine
narrower: lysine
narrower: methionine
narrower: phenylalanine
narrower: proline
narrower: serine
narrower: threonine
narrower: tryptophan
narrower: tyrosine
narrower: valine
related: corals and sclerosponges
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

aspartic acid
type: Concept
definition: an amino acid with the formula C4H7NO4.
alternative label: Asp
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: amino acid
related: corals and sclerosponges
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

glutamic acid
type: Concept
definition: an amino acid with the formula C5H9NO4.
alternative label: Glu
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: amino acid
related: corals and sclerosponges
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

glycine
type: Concept
definition: an amino acid with the formula C2H5NO2.
alternative label: Gly
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: amino acid
related: corals and sclerosponges
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

isoleucine
type: Concept
definition: an amino acid with the formula C6H13NO2 and a different chemical structure than leucine.
alternative label: Ile
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: amino acid
related: corals and sclerosponges
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

leucine
type: Concept
definition: an amino acid with the formula C6H13NO2.
alternative label: Leu
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: amino acid
related: corals and sclerosponges
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

lysine
type: Concept
definition: an amino acid with the formula C6H14N2O2.
alternative label: Lys
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: amino acid
related: corals and sclerosponges
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

phenylalanine
type: Concept
definition: an amino acid with the formula C9H11NO2.
alternative label: Phe
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: amino acid
related: corals and sclerosponges
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

proline
type: Concept
definition: an amino acid with the formula C5H9NO2.
alternative label: Pro
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: amino acid
related: corals and sclerosponges
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

serine
type: Concept
definition: an amino acid with the formula C3H7NO3.
alternative label: Ser
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: amino acid
related: corals and sclerosponges
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

threonine
type: Concept
definition: an amino acid with the formula C4H9NO3.
alternative label: Thr
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: amino acid
related: corals and sclerosponges
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

tyrosine
type: Concept
definition: an amino acid with the formula C9H11NO3.
alternative label: Tyr
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: amino acid
related: corals and sclerosponges
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

valine
type: Concept
definition: an amino acid with the formula C5H11NO2.
alternative label: Val
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: amino acid
related: corals and sclerosponges
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

cadmium/calcium
type: Concept
definition: the elemental ratio of cadmium to calcium.
alternative label: Cd/Ca
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or compound ratio
related: corals and sclerosponges
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

carbon/nitrogen
type: Concept
definition: the elemental ratio of carbon to nitrogen.
alternative label: C/N
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or compound ratio
narrower: organic carbon/nitrogen
related: corals and sclerosponges
related: fire history
related: loess and paleosol
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

copper/calcium
type: Concept
definition: the elemental ratio of copper to calcium.
alternative label: Cu/Ca
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or compound ratio
related: corals and sclerosponges
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

lead/calcium
type: Concept
definition: the elemental ratio of lead to calcium.
alternative label: Pb/Ca
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or compound ratio
related: corals and sclerosponges
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

manganese/calcium
type: Concept
definition: the elemental ratio of manganese to calcium.
alternative label: Mn/Ca
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or compound ratio
related: corals and sclerosponges
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

phosphorus/calcium
type: Concept
definition: the elemental ratio of phosphorus to calcium..
alternative label: P/Ca
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or compound ratio
related: corals and sclerosponges
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

tin/calcium
type: Concept
definition: the elemental ratio of tin to calcium.
alternative label: Sn/Ca
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or compound ratio
related: corals and sclerosponges
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

calcification rate
type: Concept
definition: a formation rate that is a rate of skeletal growth in calcifying organisms, often expressed as a mass times unit area per time (e.g., g cm2/yr)
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: formation rate
related: corals and sclerosponges
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

fluorescence
type: Concept
definition: luminescence by a substance that has absorbed light or other electromagnetic radiation.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: luminescence
narrower: potential photochemical efficiency
narrower: x-ray fluorescence
related: corals and sclerosponges
related: instrumental
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

lead
type: Concept
definition: a chemical element with atomic number 82.
alternative label: Pb
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or single-element molecule
related: corals and sclerosponges
related: ice cores
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

elemental analysis
type: Concept
definition: a laboratory method in which a sample is combusted at 1200 deg. C in a stream of unreactive gas and excess oxygen and the resulting products are collected (CO2, H2O and NOx). The masses of these combustion products can be used to calculate the composition of the unknown sample (Credit: Chemical Methods Ontology).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: laboratory method
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

graphite furnace atomic absorption spectrometry
type: Concept
definition: atomic absorption spectrometry in which the sample is atomized by placing it in a small graphite-coated tube which is rapidly heated by passing a current through it (Credit: Chemical Methods Ontology).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: atomic absorption spectroscopy
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

luminescence spectroscopy
type: Concept
definition: spectroscopy in which the intensity of luminescence emitted by molecules excited is detected as a function of wavelength or time (Credit: Chemical Methods Ontology).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: spectroscopy
narrower: fluorescence spectroscopy
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

acidity
type: Concept
definition: a solution property that quantifies the concentration of hydrogen ions.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: solution property
narrower: pH
related: ice cores
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

aluminum
type: Concept
definition: a chemical element with atomic number 13.
alternative label: Al
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or single-element molecule
related: ice cores
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

bulk atmosphere
type: Concept
definition: a whole sample of the atmosphere, without any separation of components.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: atmospheric material
related: ice cores
related: instrumental
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

carbon dioxide
type: Concept
definition: an inorganic compound that has the chemical formula CO2.
alternative label: CO2
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: inorganic compound
related: ice cores
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

carbon monoxide
type: Concept
definition: an inorganic compound that has the chemical formula CO.
alternative label: CO
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: inorganic compound
related: ice cores
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

nitrogen gas
type: Concept
definition: nitrogen that exists as a diatomic gas.
alternative label: N2
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or single-element molecule
related: ice cores
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

oxygen gas
type: Concept
definition: oxygen that exists as a diatomic gas.
alternative label: O2
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or single-element molecule
related: ice cores
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

snow
type: Concept
definition: precipitation in the form of ice crystals.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: precipitation
related: ice cores
related: instrumental
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

firn
type: Concept
definition: a hydrologic material that is transitional between snow and ice (Credit: Dictionary of Geological Terms).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: hydrologic material
related: ice cores
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

bulk ice
type: Concept
definition: a hydrologic material that is a whole sample of recrystallized and compacted snow, without any separation of components.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: hydrologic material
related: ice cores
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

nitrate
type: Concept
definition: an inorganic compound that has the chemical formula NO3(-).
alternative label: NO3-
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: inorganic compound
related: ice cores
related: instrumental
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

nitrous oxide
type: Concept
definition: an inorganic compound that has the chemical formula N2O.
alternative label: N2O
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: inorganic compound
related: ice cores
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

sulfate
type: Concept
definition: an inorganic compound that has the formula SO4(2-).
alternative label: SO4(2-)
alternative label: sulphate
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: inorganic compound
narrower: non-sea-salt sulfate
related: ice cores
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

non-sea-salt sulfate
type: Concept
definition: sulfate that is derived from sources other than sea salt.
alternative label: nss sulfate
alternative label: nss sulphate
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: sulfate
related: ice cores
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

dust
type: Concept
definition: a bulk geological material that consists of organic or inorganic particles of typically clay and silt size that are transportable by wind.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: bulk geological material
narrower: loess
related: ice cores
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

sampling method
type: Concept
definition: a laboratory method that relates to how individual physical samples are removed from the physical archive (e.g., the core).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: laboratory method
narrower: continuous flow analysis
narrower: gas extraction method
narrower: laser ablation
narrower: sample spacing method
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

cold vapor atomic fluorescence spectroscopy
type: Concept
definition: atomic fluorescence spectroscopy in which no vaporization step is required because the sample is a volatile heavy metal such as mercury, which is a vapor at room temperature (Credit: Chemical Methods Ontology).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: atomic spectroscopy
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

continuous-flow isotope ratio mass spectrometry
type: Concept
definition: isotope ratio mass spectrometry in which the relative abundance of isotopes in a sample is determined. Measurements are taken immediately after sample preparation and separately to the standard gas (Credit: Chemical Methods Ontology).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: isotope ratio mass spectrometry
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

continuous flow analysis
type: Concept
definition: a sampling method in which samples are injected sequentially into the same flowing carrier solution.
alternative label: CFA
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: sampling method
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

electrospray ionization mass spectrometry
type: Concept
definition: mass spectrometry in which the sample is ionized by electrospray ionization. The ions are then characterized by their mass-to-charge ratio and relative abundance (Credit: Chemical Methods Ontology).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: mass spectrometry
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

gas chromatography - electron capture detection
type: Concept
definition: gas chromatography that uses a device that detects electron-absorbing components.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: gas chromatography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

gas chromatography - flame ionization detection
type: Concept
definition: gas chromatography in which eluent is mixed with H2 and air and ignited. Any positively-charged radicals resulting from this process are collected at a cathode allowing the current to be measured (Credit: Chemical Methods Ontology)
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: gas chromatography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

ion chromatography
type: Concept
definition: column chromatography where the separation is caused by differences in ion-exchange affinity (Credit: Chemical Methods Ontology).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: chromatography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

tunable diode laser absorption spectroscopy
type: Concept
definition: laser spectroscopy in which a diode laser is tuned to a specific absorption line of interest in the sample and the intensity of the transmitted radiation is measured (Credit: Chemical Methods Ontology).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: laser spectroscopy
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

cavity ring-down spectroscopy
type: Concept
definition: a type of laser spectroscopy in which the sample is placed inside a highly reflective laser cavity and an effect induced by the absorption of laser light is detected. The decay time for light exiting the cavity is determined as a function of pulsed laser wavelength (Credit: Chemical Methods Ontology).
alternative label: cavity ring-down laser absorption spectroscopy
alternative label: cavity ring-down spectrometry
alternative label: cavity ringdown spectroscopy
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: laser spectroscopy
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

standard error
type: Concept
definition: a measure of how far the sample mean is expected to deviate from its actual value, based on the standard deviation of the sample and its size.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: error
narrower: one standard error
narrower: one standard error lower bound
narrower: one standard error upper bound
narrower: two standard error
narrower: two standard error lower bound
narrower: two standard error upper bound
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

one standard error lower bound
type: Concept
definition: the lower bound (minimum) estimate of the actual mean calculated by subtracting one standard error from the sample mean. This value is approached by a 68% confidence interval lower bound at large sample sizes.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: standard error
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

one standard error upper bound
type: Concept
definition: the upper bound (maximum) estimate of the actual mean calculated by adding one standard error from the sample mean. This value is approached by a 68% confidence interval upper bound at large sample sizes.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: standard error
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

two standard error lower bound
type: Concept
definition: the lower bound (minimum) estimate of the actual mean calculated by subtracting two standard errors from the sample mean. This value is approached by a 95% confidence interval lower bound at large sample sizes.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: standard error
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

two standard error upper bound
type: Concept
definition: the upper bound (maximum) estimate of the actual mean calculated by adding one standard error from the sample mean. This value is approached by a 95% confidence interval upper bound at large sample sizes.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: standard error
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

one standard deviation lower bound
type: Concept
definition: a measure that is defined as the mean minus one standard deviation. If the data is distributed approximately normally and the sample size is large, this measure defines the minimum value of the interval that captures about 68% of the observations.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: standard deviation
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

one standard deviation upper bound
type: Concept
definition: a measure that is defined as the mean plus one standard deviation. If the data is distributed approximately normally and the sample size is large, this measure defines the maximum value of the interval that captures about 68% of the observations.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: standard deviation
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

two standard deviations lower bound
type: Concept
definition: a measure that is defined as the mean minus two standard deviations. If the data is distributed approximately normally and the sample size is large, this measure defines the minimum value of the interval that captures about 95% of the observations.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: standard deviation
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

two standard deviations upper bound
type: Concept
definition: a measure that is defined as the mean plus two standard deviations. If the data is distributed approximately normally and the sample size is large, this measure defines the maximum value of the interval that captures about 95% of the observations.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: standard deviation
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

ammonium
type: Concept
definition: an inorganic compound that has the chemical formula NH4(+).
alternative label: NH4+
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: inorganic compound
related: ice cores
related: instrumental
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

antimony
type: Concept
definition: a chemical element with atomic number 51.
alternative label: Sb
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or single-element molecule
related: ice cores
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

arsenic
type: Concept
definition: a chemical element with atomic number 33.
alternative label: As
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or single-element molecule
related: ice cores
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

barium
type: Concept
definition: a chemical element with atomic number 56.
alternative label: Ba
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or single-element molecule
narrower: barium excess
related: ice cores
related: instrumental
related: paleoceanography
related: paleolimnology
related: speleothems
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

beryllium
type: Concept
definition: a chemical element with atomic number 4.
alternative label: Be
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or single-element molecule
related: ice cores
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

10Be
type: Concept
definition: the concentration of a radioactive isotope of beryllium that has 6 neutrons and 4 protons and that is used to reconstruct solar activity and to date ice cores.
alternative label: Be-10
alternative label: beryllium-10
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: single isotope concentration
related: ice cores
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

hydrogen carbonate
type: Concept
definition: an inorganic compound that has the chemical formula HCO3(-).
alternative label: HCO3-
alternative label: bicarbonate
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: inorganic compound
related: ice cores
related: instrumental
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

bismuth
type: Concept
definition: a chemical element with atomic number 83.
alternative label: Bi
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or single-element molecule
related: ice cores
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

black carbon
type: Concept
definition: a bulk biological material that consists of fine particulate matter that is formed through incomplete combustion of a carbon-containing material.
alternative label: BC
alternative label: soot
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: bulk biological material
related: ice cores
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

carbon
type: Concept
definition: a chemical element with atomic number 6.
alternative label: C
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or single-element molecule
narrower: inorganic carbon
narrower: organic carbon
related: fire history
related: ice cores
related: loess and paleosol
related: paleoceanography
related: paleoclimatic modeling
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

14C
type: Concept
definition: the concentration of a radioactive isotope of carbon with 8 neutrons and 6 protons.
alternative label: C-14
alternative label: carbon-14
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: single isotope concentration
related: ice cores
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

cadmium
type: Concept
definition: a chemical element with atomic number 48.
alternative label: Cd
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or single-element molecule
related: climate reconstructions
related: ice cores
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

calcium
type: Concept
definition: a chemical element with atomic number 20.
alternative label: Ca
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or single-element molecule
narrower: non-sea-salt calcium
related: ice cores
related: instrumental
related: paleoceanography
related: paleoclimatic modeling
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

chlorine
type: Concept
definition: a chemical element with atomic number 17.
alternative label: Cl
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or single-element molecule
narrower: chloride
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

chloride
type: Concept
definition: chlorine that has acquired a negative one charge as the result of gaining an electron.
alternative label: Cl-
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: chlorine
related: ice cores
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

chromium
type: Concept
definition: a chemical element with atomic number 24.
alternative label: Cr
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or single-element molecule
related: ice cores
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

cesium
type: Concept
definition: a chemical element with atomic number 55.
alternative label: Cs
alternative label: caesium
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or single-element molecule
related: ice cores
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

cobalt
type: Concept
definition: a chemical element with atomic number 27.
alternative label: Co
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or single-element molecule
related: ice cores
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

delta 17O
type: Concept
definition: the ratio of two isotopes of oxygen, 17O/16O, in a sample compared to that of a standard, as in: ((17O/16O sample)/(17O/16O standard) - 1) x 1000.
alternative label: d17O
alternative label: delta O17
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: isotope ratio
narrower: delta 17O excess
related: ice cores
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

diameter
type: Concept
definition: a physical property that is the length of a straight line connecting two sides of a body through its center.
alternative label: diametre
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: length
narrower: grain size
narrower: tracheid diameter
related: ice cores
related: paleoceanography
related: tree ring
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

dust
type: Concept
definition: a bulk geological material that consists of organic or inorganic particles of typically clay and silt size that are transportable by wind.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: bulk geological material
related: climate reconstructions
related: ice cores
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

electrical property
type: Concept
definition: properties that relate to how a material behaves or interacts with an applied electric current.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: what
narrower: electrical conductivity
narrower: impedance
narrower: resistivity
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

electrical conductivity
type: Concept
definition: an electrical property that quantifies the degree to which a specified material conducts electricity.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: electrical property
related: climate reconstructions
related: ice cores
related: insect
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

fluorine
type: Concept
definition: a chemical element with atomic number 9.
alternative label: F
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or single-element molecule
narrower: fluoride
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

fluoride
type: Concept
definition: fluorine that has acquired a negative one charge as the result of gaining an electron.
alternative label: F-
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: fluorine
related: ice cores
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

formic acid
type: Concept
definition: a n-alkanoic acid with the formula HCOOH.
alternative label: methanoic acid
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: n-alkanoic acid
related: ice cores
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

formate
type: Concept
definition: a carbonyl compound with the formula CHO2(-).
alternative label: methanoate
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: carbonyl compound
related: ice cores
created: 2018-03-26 00:00:00.0
modified: 2021-04-19 13:34:00.0

gold
type: Concept
definition: a chemical element with atomic number 79.
alternative label: Au
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or single-element molecule
related: ice cores
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

hafnium
type: Concept
definition: a chemical element with atomic number 72.
alternative label: Hf
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or single-element molecule
related: ice cores
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

hydrogen
type: Concept
definition: a chemical element with atomic number 1.
alternative label: H
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or single-element molecule
narrower: hydrogen ion
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

hydrogen ion
type: Concept
definition: a hydrogen atom that has been separated from its accompanying electron and that has a unit positive electric charge.
alternative label: H+
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: hydrogen
related: ice cores
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

hydrogen peroxide
type: Concept
definition: an inorganic compound that has the chemical formula H2O2.
alternative label: H2O2
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: inorganic compound
related: ice cores
related: instrumental
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

iridium
type: Concept
definition: a chemical element with atomic number 77.
alternative label: Ir
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or single-element molecule
related: ice cores
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

lead/barium
type: Concept
definition: the elemental ratio of lead to barium.
alternative label: Pb/Ba
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or compound ratio
related: ice cores
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

magnesium
type: Concept
definition: a chemical element with atomic number 12.
alternative label: Mg
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or single-element molecule
related: ice cores
related: instrumental
related: paleoceanography
related: paleoclimatic modeling
related: paleolimnology
related: speleothems
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

mercury
type: Concept
definition: a chemical element with atomic number 80.
alternative label: Hg
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or single-element molecule
related: ice cores
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

methanesulfonic acid
type: Concept
definition: an organosulfur compound that has the chemical formula CH4O3S.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: organosulfur compound
related: ice cores
related: instrumental
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

methanesulfonate
type: Concept
definition: an organosulfur compound that has the chemical formula CH3O3S.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: organosulfur compound
related: ice cores
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

molybdenum
type: Concept
definition: a chemical element with atomic number 42.
alternative label: Mo
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or single-element molecule
related: ice cores
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

nickel
type: Concept
definition: a chemical element with atomic number 28.
alternative label: Ni
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or single-element molecule
related: ice cores
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

non-sea-salt calcium
type: Concept
definition: calcium that is derived from sources other than sea salt.
alternative label: nss Ca
alternative label: nss calcium
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: calcium
related: ice cores
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

sulfur
type: Concept
definition: a chemical element with atomic number 16.
alternative label: S
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or single-element molecule
narrower: non-sea-salt sulfur
related: ice cores
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

non-sea-salt sulfur
type: Concept
definition: sulfur that is derived from sources other than sea salt.
alternative label: non-sea-salt sulphur
alternative label: nss S
alternative label: nss sulfur
alternative label: nss sulphur
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: sulfur
related: ice cores
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

oxalate
type: Concept
definition: a carbonyl compound with the formula C2O4(2-).
alternative label: ethanedioate
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: carbonyl compound
related: ice cores
created: 2018-03-26 00:00:00.0
modified: 2021-04-19 13:34:25.0

206Pb/207Pb
type: Concept
definition: the ratio of a stable isotope of lead with 124 neutrons and a stable isotope of lead with 125 neutrons.
alternative label: lead-206/lead-207
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: isotope ratio
related: ice cores
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

208Pb/207Pb
type: Concept
definition: the ratio of a stable isotope of lead with 126 neutrons and a stable isotope of lead with 125 neutrons.
alternative label: lead-208/lead-207
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: isotope ratio
related: ice cores
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

206Pb/204Pb
type: Concept
definition: the ratio of a stable isotope of lead with 124 neutrons and a stable isotope of lead with 122 neutrons.
alternative label: lead-206/lead-204
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: isotope ratio
related: ice cores
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

phosphate
type: Concept
definition: an inorganic compound that has the chemical formula PO4(3-).
alternative label: PO4
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: inorganic compound
narrower: dissolved phosphate
related: ice cores
related: instrumental
related: paleoclimatic modeling
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

potassium
type: Concept
definition: a chemical element with atomic number 19.
alternative label: K
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or single-element molecule
related: ice cores
related: instrumental
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

rubidium
type: Concept
definition: a chemical element with atomic number 37.
alternative label: Rb
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or single-element molecule
related: ice cores
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

scandium
type: Concept
definition: a chemical element with atomic number 21.
alternative label: Sc
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or single-element molecule
related: ice cores
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

silver
type: Concept
definition: a chemical element with atomic number 47.
alternative label: Ag
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or single-element molecule
related: ice cores
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

sodium
type: Concept
definition: a chemical element with atomic number 11.
alternative label: Na
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or single-element molecule
narrower: sea-salt sodium
related: ice cores
related: instrumental
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

terbium
type: Concept
definition: a chemical element with atomic number 65.
alternative label: Tb
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or single-element molecule
related: ice cores
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

thallium
type: Concept
definition: a chemical element with atomic number 81.
alternative label: Tl
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or single-element molecule
related: ice cores
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

tin
type: Concept
definition: a chemical element with atomic number 50.
alternative label: Sn
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or single-element molecule
related: ice cores
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

uranium
type: Concept
definition: a chemical element with atomic number 92.
alternative label: U
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or single-element molecule
related: ice cores
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

vanadium
type: Concept
definition: a chemical element with atomic number 23.
alternative label: V
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or single-element molecule
related: ice cores
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

vanillic acid
type: Concept
definition: a phenolic acid that has the formula C8H8O4.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: phenol
related: ice cores
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

weight
type: Concept
definition: a physical property that is the force on a object due to gravity and that is generally measured using a spring scale.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: physical property
related: corals and sclerosponges
related: ice cores
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

nanomole
type: Concept
definition: a substance unit equal to one thousandth of one millionth of a mole or 10^[-9] mol (Credit: Units of measurement ontology).
alternative label: nmol
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: substance unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

nanogram
type: Concept
definition: a mass unit which is equal to one thousandth of one millionth of a gram or 10^[-9] g (Credit: Units of measurement ontology).
alternative label: ng
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: mass unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

picogram
type: Concept
definition: a mass unit which is equal to 10^[-12] g (Credit: Units of measurement ontology).
alternative label: pg
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: mass unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

carbon dioxide
type: Concept
definition: an inorganic compound that has the chemical formula CO2.
alternative label: CO2
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: inorganic compound
related: climate forcing
related: ice cores
related: instrumental
related: paleoceanography
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

carbon monoxide
type: Concept
definition: an inorganic compound that has the chemical formula CO.
alternative label: CO
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: inorganic compound
related: ice cores
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

methane
type: Concept
definition: an alkane that has the formula CH4.
alternative label: CH4
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: n-alkane
related: climate forcing
related: ice cores
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

nitrous oxide
type: Concept
definition: an inorganic compound that has the chemical formula N2O.
alternative label: N2O
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: inorganic compound
related: climate forcing
related: ice cores
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

nitrate
type: Concept
definition: an inorganic compound that has the chemical formula NO3(-).
alternative label: NO3-
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: inorganic compound
related: ice cores
related: instrumental
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

melt
type: Concept
definition: a formation property that quantifies the degree of melting that occurred during the process of snow or ice accumulation.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: formation property
related: ice cores
created: 2018-03-26 00:00:00.0
modified: 2020-08-14 17:57:41.0

dielectric profiling
type: Concept
definition: an electrical conductivity measurement in which the impedance of a material is measured between two conductive plates, yielding information about the concentration of ions.
alternative label: DEP
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: electrical conductivity measurement
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

laser-induced breakdown spectroscopy
type: Concept
definition: atomic emission spectrometry in which a high energy laser pulse is used to generate a plasma which acts as the excitation source (Credit: Chemical Methods Ontology).
alternative label: laser-induced plasma spectrometry
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: atomic spectroscopy
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

optical feedback cavity enhanced absorption spectroscopy
type: Concept
definition: laser spectroscopy in which the sample is placed inside a v-shaped optical cavity and an effect induced by the absorption of laser light is detected. The laser light is allowed to feed back to the laser diode (Credit: Chemical Methods Ontology).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: laser spectroscopy
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

87Sr/86Sr
type: Concept
definition: the ratio of a stable isotope of strontium with 49 neutrons and a stable isotope of strontium with 48 neutrons.
alternative label: strontium-87/strontium-86
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: isotope ratio
related: ice cores
related: paleoceanography
related: paleolimnology
related: speleothems
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

calcium carbonate
type: Concept
definition: a carbonate with the chemical formula CaCO3 but of unspecified crystal structure.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: carbonate
narrower: aragonite
narrower: calcite
related: corals and sclerosponges
related: loess and paleosol
related: paleoceanography
related: paleoclimatic modeling
related: paleolimnology
related: speleothems
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

delta 87Sr
type: Concept
definition: the ratio of two isotopes of strontium, 87Sr/86Sr, in a sample compared to that of a standard, as in: ((87Sr/86Sr sample)/(87Sr/86Sr standard) - 1) x 1000.
alternative label: d87Sr
alternative label: delta Sr87
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: isotope ratio
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

dolomite
type: Concept
definition: a carbonate with the formula CaMg(CO3)2.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: carbonate
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

feldspar group
type: Concept
definition: a silicate mineral with the general formula XAl(Al,Si)3O8 where X can be K, Na, Ca, Ba, Rb, Sr, or Fe.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: silicate mineral
narrower: alkali feldspar series
narrower: plagioclase feldspar series
related: ice cores
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

gastropod
type: Concept
definition: an identifiable organism including the slugs and snails that belongs to the kingdom Animalia, phylum Mollusca, class Gastropoda.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: organism
narrower: gastropod index
narrower: identified gastropod
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

organic carbon
type: Concept
definition: carbon that is derived from an organic source.
alternative label: organic C
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: carbon
narrower: dissolved organic carbon
related: loess and paleosol
related: paleoceanography
related: paleoclimatic modeling
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

inorganic carbon
type: Concept
definition: carbon that is derived from an inorganic source.
alternative label: inorganic C
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: carbon
narrower: dissolved inorganic carbon
related: loess and paleosol
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

mass
type: Concept
definition: a physical property that is the amount of matter in an object and that is generally measured using a balance scale.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: physical property
narrower: basal area mass increment
related: corals and sclerosponges
related: ice cores
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

identified mineral
type: Concept
definition: a geological material that has been identified based on composition and crystal structure as a specific mineral or as belonging to a certain mineral class.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: geological material
narrower: carbonate
narrower: halide mineral
narrower: mineral index
narrower: organic compound mineral
narrower: oxide and hydroxide minerals
narrower: phosphate mineral
narrower: silicate mineral
narrower: sulfate mineral
narrower: sulfide mineral
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

ostracod
type: Concept
definition: an identifiable organism that belongs to the kingdom Animalia, phylum Arthropoda, class Ostracoda.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: organism
narrower: identified ostracod
narrower: ostracod index
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

plagioclase feldspar series
type: Concept
definition: a feldspar group mineral that exists on the continuum of CaAl2Si2O8 to NaAlSi3O8.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: feldspar group
narrower: albite
narrower: andesine
narrower: anorthite
narrower: bytownite
narrower: labradorite
narrower: oligoclase
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

quartz
type: Concept
definition: a silicate mineral with the formula SiO2.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: silicate mineral
related: ice cores
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

reflectance
type: Concept
definition: an electromagnetic property that measures the amount of light that reflects from the surface of a material.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: electromagnetic property
narrower: CIE L*a*b* color system
narrower: CIEXYZ color system
narrower: Munsell color system
narrower: RGB color system
narrower: grayscale
narrower: scattering
related: paleoceanography
related: paleolimnology
related: tree ring
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

rhodochrosite
type: Concept
definition: a carbonate with the formula MnCO3.
alternative label: MnCO3
alternative label: manganese carbonate
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: carbonate
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

sedimentation rate
type: Concept
definition: a formation rate that is the amount of sediment deposited during a certain time span, normally expressed as a length per time (e.g., cm/yr).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: formation rate
related: fire history
related: loess and paleosol
related: paleoceanography
related: paleoclimatic modeling
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

gallium
type: Concept
definition: a chemical element with atomic number 31.
alternative label: Ga
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or single-element molecule
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

lithium
type: Concept
definition: a chemical element with atomic number 3.
alternative label: Li
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or single-element molecule
related: ice cores
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

manganese/iron
type: Concept
definition: the elemental ratio of manganese to iron.
alternative label: Mn/Fe
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or compound ratio
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

nitrogen
type: Concept
definition: a chemical element with atomic number 7.
alternative label: N
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or single-element molecule
narrower: dissolved organic nitrogen
narrower: nitrogen gas
related: fire history
related: loess and paleosol
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

oxygen
type: Concept
definition: a chemical element with atomic number 8.
alternative label: O
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or single-element molecule
narrower: oxygen gas
related: paleoceanography
related: paleoclimatic modeling
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

phosphorus
type: Concept
definition: a chemical element with atomic number 15.
alternative label: P
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or single-element molecule
narrower: dissolved organic phosphorus
related: paleoceanography
related: paleoclimatic modeling
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

silicon/titanium
type: Concept
definition: the elemental ratio of silicon to titanium.
alternative label: Si/Ti
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or compound ratio
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

zirconium
type: Concept
definition: a chemical element with atomic number 40.
alternative label: Zr
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or single-element molecule
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

total head capsules
type: Concept
definition: the count of total midge head capsules present in a sample.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: midge index
related: insect
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

total salinity indifferent diatoms
type: Concept
definition: the total count or percentage of diatoms in an assemblage that may occur in either saline or fresh environments.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: diatom tolerance-based index
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

magnetic property
type: Concept
definition: properties relating to a material's magnetism.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: what
narrower: magnetic field properties
narrower: magnetic moments
narrower: magnetic ratios
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

anhysteretic remanent magnetization
type: Concept
definition: the remanent magnetization that is acquired by exposure to an alternating field (AF) of gradually decreasing amplitude simultaneously with a steady, unidirectional direct current field (Credit: Encyclopedia of Geomagnetism and Paleomagnetism). It is sensitive to both ferrimagnetic concentration and ferrimagnetic grain size (Hatfield and Stoner, 2013).
alternative label: ARM
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: remanent magnetization
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

coercivity
type: Concept
definition: a magnetic field property that is the measure of the reverse field needed to reduce the magnetization of a material to zero after it has been fully magnetized.
alternative label: Hc
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: magnetic field properties
narrower: coercivity of remanence
related: loess and paleosol
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

coercivity of remanence
type: Concept
definition: a coercivity measure that is the value of the reverse field needed to reduce the saturation isothermal remanence magnetization of a material to zero, and that is an indicator of magnetic grain size and mineralogy (hematite, goethite, and greigite are high coercivity minerals).
alternative label: (B0)CR
alternative label: Hr
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: coercivity
related: loess and paleosol
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

initial magnetization slope
type: Concept
definition: the slope of the initial magnetization curve of a hysteresis loop, which is created during the magnetization of a material following complete demagnetization, and is the ratio of the magnetization of the material to the magnetic field applied.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: magnetic ratios
related: loess and paleosol
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

isothermal remanent magnetization
type: Concept
definition: the remanent magnetization that is acquired without the aid of changes in temperature, generally from the application and subsequent removal of an applied direct current field (Credit: Encyclopedia of Geomagnetism and Paleomagnetism).
alternative label: IRM
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: remanent magnetization
narrower: saturation isothermal remanent magnetization
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

saturation remanent magnetization
type: Concept
definition: the remanent magnetization of a sample after removal of a magnetic field large enough to achieve saturation.
alternative label: Mr
alternative label: Mrs
alternative label: saturation remanence
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: remanent magnetization
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

saturation isothermal remanent magnetization
type: Concept
definition: the maximum isothermal remanent magnetization that a material can acquire.
alternative label: SIRM
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: isothermal remanent magnetization
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

S-ratio
type: Concept
definition: a magnetic ratio using different isothermal remanent magnetization measurements, which can indicate the relative amount of magnetic minerals in a sample. Values close to 1 indicate the presence of low-coercivity minerals (magnetite and/or maghemite); values that are negative or close to 0 indicate the presence of high coercivity minerals (hematite and/or goethite).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: magnetic ratios
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

physical property
type: Concept
definition: properties that describe the physical characteristics of a substance.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: what
narrower: angle
narrower: area
narrower: density
narrower: length
narrower: mass
narrower: porosity
narrower: thickness
narrower: volume
narrower: wave property
narrower: weight
narrower: width
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

statistical variable
type: Concept
definition: a variable that is derived through the analysis of numerical data.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: what
narrower: hypothesis testing variable
narrower: multivariate eigenvector-based variable
narrower: proxy composite
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

principal component
type: Concept
definition: a mutivariate eigenvector-based variable that is one of a set of linearly uncorrelated time series patterns that are derived using an orthogonal transformation on a set of continuous data observations.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: multivariate eigenvector-based variable
related: climate reconstructions
related: paleoceanography
related: paleolimnology
related: speleothems
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

glycerol dialkyl glycerol tetraether
type: Concept
definition: an organooxygen compound that is a tetraether membrane lipid and that contains between 0 and 4 cyclopentane moieties, with an increasing number of cyclopentane moieties related to the temperature of formation.
alternative label: GDGT
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: lipid
related: climate reconstructions
related: paleoceanography
related: paleolimnology
related: speleothems
created: 2018-03-26 00:00:00.0
modified: 2021-04-19 13:21:21.0

electron probe x-ray microanalysis
type: Concept
definition: x-ray emission spectroscopy in which the X-rays are generated by bombarding a flat polished sample with a finely focused beam of electrons (Credit: Chemical Methods Ontology).
alternative label: electron microprobe analysis
alternative label: electron probe microanalysis
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: x-ray spectroscopy
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

secondary ion mass spectrometry
type: Concept
definition: mass spectrometry in which the sample is bombarded with a stream of primary mass-selected particles and the secondary ions ejected from the sample are detected (Credit: Chemical Methods Ontology).
alternative label: SIMS
alternative label: ion microprobe
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: mass spectrometry
narrower: multiple collector secondary ion mass spectrometry
narrower: single collector secondary ion mass spectrometry
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

Monte Carlo simulation
type: Concept
definition: a statistical analysis method that uses repeated random sampling, often to generate a probability distribution of likely values.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: statistical analysis method
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

densitometry
type: Concept
definition: a laboratory method that measures optical density in light-sensitive materials due to exposure to electromagnetic radiation.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: laboratory method
narrower: fluorodensitometry
narrower: gamma ray densitometry
narrower: x-ray densitometry
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

fluorodensitometry
type: Concept
definition: densitometry using applied fluorescence radiation.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: densitometry
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

gamma ray densitometry
type: Concept
definition: densitometery using applied gamma radiation.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: densitometry
narrower: gamma ray attenuation porosity evaluation
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

continuous line
type: Concept
definition: a sample spacing method in which samples are extracted from an archive (e.g., a core) contiguously.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: sample spacing method
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

discrete spot
type: Concept
definition: a sample spacing method in which samples are extracted from an archive (e.g., a core) non-contiguously.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: sample spacing method
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

bulk sample
type: Concept
definition: a sample spacing method in which one bulk measurement is made from an archive (e.g., a core, rock, or shell).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: sample spacing method
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

single collector secondary ion mass spectrometry
type: Concept
definition: secondary ion mass spectrometry in which one collectors is used to detect one ion beam.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: secondary ion mass spectrometry
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

multiple collector secondary ion mass spectrometry
type: Concept
definition: secondary ion mass spectrometry in which a series of collectors is used to detect several ion beams simultaneously.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: secondary ion mass spectrometry
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

dual-inlet isotope ratio mass spectrometry
type: Concept
definition: isotope ratio mass spectrometry in which purified gas obtained from a sample is alternated rapidly with a standard gas (of known isotopic composition) by means of a system of valves, so that a number of comparative measurements are made of both gases. The relative abundance of isotopes in a sample is then determined (Credit: Chemical Methods Ontology).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: isotope ratio mass spectrometry
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

Acropora humilis
type: Concept
definition: a particular species of the Acropora genus that is commonly known as finger coral.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: Acropora sp.
related: corals and sclerosponges
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

Acropora samoensis
type: Concept
definition: a particular species of the Acropora genus.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: Acropora sp.
related: corals and sclerosponges
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

Pocillopora damicornus
type: Concept
definition: a particular species of the genus Pocillopora that is commonly known as the cauliflower coral.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: Pocillopora sp.
related: corals and sclerosponges
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

asparagine
type: Concept
definition: an amino acid with the formula C4H8N2O3.
alternative label: Asn
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: amino acid
related: corals and sclerosponges
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

glutamine
type: Concept
definition: an amino acid with the formula C5H10N2O3.
alternative label: Gln
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: amino acid
related: corals and sclerosponges
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

cysteine
type: Concept
definition: an amino acid with the formula C3H7NO2S.
alternative label: Cys
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: amino acid
related: corals and sclerosponges
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

histidine
type: Concept
definition: an amino acid with the formula C6H9N3O2.
alternative label: His
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: amino acid
related: corals and sclerosponges
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

methionine
type: Concept
definition: an amino acid with the formula C5H11NO2S.
alternative label: Met
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: amino acid
related: corals and sclerosponges
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

tryptophan
type: Concept
definition: an amino acid with the formula C11H12N2O2.
alternative label: Trp
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: amino acid
related: corals and sclerosponges
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

x-ray densitometry
type: Concept
definition: densitometry using applied x radiation.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: densitometry
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

x-ray fluorescence spectroscopy
type: Concept
definition: x-ray spectroscopy in which the sample is bombarded with X-rays or particles and the energies and intensities of the X-rays emitted due to core-to-core transitions (known as 'X-ray fluorescence') are detected (Credit: Chemical Methods Ontology).
alternative label: XRF
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: x-ray spectroscopy
narrower: energy-dispersive x-ray fluorescence spectroscopy
narrower: wavelength-dispersive x-ray fluorescence spectroscopy
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

boron
type: Concept
definition: a chemical element with atomic number 5.
alternative label: B
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or single-element molecule
related: instrumental
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

n-alkanoic acid
type: Concept
definition: a saturated fatty acid with the general formula CnH(2n+1)COOH.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: fatty acid
narrower: C16 n-alkanoic acid
narrower: C17 n-alkanoic acid
narrower: C18 n-alkanoic acid
narrower: C19 n-alkanoic acid
narrower: C20 n-alkanoic acid
narrower: C21 n-alkanoic acid
narrower: C22 n-alkanoic acid
narrower: C23 n-alkanoic acid
narrower: C24 n-alkanoic acid
narrower: C25 n-alkanoic acid
narrower: C26 n-alkanoic acid
narrower: C27 n-alkanoic acid
narrower: C28 n-alkanoic acid
narrower: C29 n-alkanoic acid
narrower: C30 n-alkanoic acid
narrower: C31 n-alkanoic acid
narrower: C32 n-alkanoic acid
narrower: C33 n-alkanoic acid
narrower: C34 n-alkanoic acid
related: loess and paleosol
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

palmitic acid
type: Concept
definition: a fatty acid with the formula C16H32O2.
alternative label: hexadecanoic acid
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: fatty acid
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

C22 n-alkanoic acid
type: Concept
definition: a n-alkanoic acid with the formula C21H43COOH.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: n-alkanoic acid
related: loess and paleosol
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

C24 n-alkanoic acid
type: Concept
definition: a n-alkanoic acid with the formula C23H47COOH.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: n-alkanoic acid
related: loess and paleosol
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

C26 n-alkanoic acid
type: Concept
definition: a n-alkanoic acid with the formula C25H51COOH.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: n-alkanoic acid
related: loess and paleosol
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

C28 n-alkanoic acid
type: Concept
definition: a n-alkanoic acid with the formula C27H55COOH.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: n-alkanoic acid
related: loess and paleosol
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

C30 n-alkanoic acid
type: Concept
definition: a n-alkanoic acid with the formula C29H59COOH.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: n-alkanoic acid
related: loess and paleosol
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

ostracod
type: Concept
definition: an identifiable organism that belongs to the kingdom Animalia, phylum Arthropoda, class Ostracoda.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: organism
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

gastropod
type: Concept
definition: an identifiable organism including the slugs and snails that belongs to the kingdom Animalia, phylum Mollusca, class Gastropoda.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: organism
related: loess and paleosol
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

acetic acid
type: Concept
definition: an organooxygen compound with the chemical formula C2H3O2.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: organooxygen compound
narrower: insoluble acetic acid
narrower: soluble acetic acid
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

correspondence analysis axis
type: Concept
definition: a multivariate eigenvector-based variable that is one of a set of linearly uncorrelated variables that are derived using an orthogonal transformation on a set of categorical data observations.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: multivariate eigenvector-based variable
narrower: canonical correspondence analysis axis
narrower: detrended correspondence analysis axis
related: climate reconstructions
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

detrended correspondence analysis axis
type: Concept
definition: an axis that is derived from extension of correspondence analysis in which artifacts in the data are removed.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: correspondence analysis axis
related: climate reconstructions
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

grain size
type: Concept
definition: the diameter of individual grains of a material such as sediment, dust, or ice.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: diameter
narrower: grain size class
narrower: grain size parameter
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

carbon coulometry
type: Concept
definition: a laboratory method that uses coulometric titration to quantify organic and inorganic carbon.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: laboratory method
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

x-ray diffraction
type: Concept
definition: a diffraction method for determining structure by directing a beam of X-rays at the sample and detecting the positions and intensities of the diffracted X-rays as a pattern of spots on a photographic plate (Credit: Chemical Methods Ontology).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: diffraction and scattering method
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

spectrophotometry
type: Concept
definition: electronic spectroscopy in which the sample absorbs radiation in the range ultraviolet to near-infrared (0.1 to 2.5 micrometers) resulting in electronic transitions within the sample (Credit: Chemical Methods Ontology).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: electronic spectroscopy
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

fall
type: Concept
definition: a non-calendric period that encompasses the local period of transition between summer and winter without specification of certain days or months.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: non-calendric period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

spring
type: Concept
definition: a non-calendric period that encompasses the local period of transition between winter and summer without specification of certain days or months.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: non-calendric period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

summer
type: Concept
definition: a non-calendric period that encompasses the warmest period of the year without specification of certain days or months.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: non-calendric period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

winter
type: Concept
definition: a non-calendric period that encompasses the coldest period of the year without specification of certain days or months.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: non-calendric period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

natural remanent magnetization
type: Concept
definition: the remanent magnetization of a rock or sediment that is permanent and present before any treatment. The NRM includes primary components (ChRM) that were acquired when the rock formed, and secondary components that were acquired after rock formation due to exposure to other large magnetic fields.
alternative label: NRM
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: remanent magnetization
narrower: characteristic remanent magnetization
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

maximum angular deviation
type: Concept
definition: a measure of the likely directional error affecting the recovered magnetic field direction from a single sample, usually provided by demagnetization techniques and principal component analysis.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: characteristic remanent magnetization
related: loess and paleosol
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

dimensionless (SI system)
type: Concept
definition: a dimensionless measure of volume magnetic susceptibility that results from values of magnetization and magnetic field strength in Standard International units, i.e., ampere per meter.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: dimensionless
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

Hounsfield unit
type: Concept
definition: a relative unit that measures the radiodensity of a substance and that is calculated as 1000 x (usample - uwater)/(uwater - uair) where u is a linear attenuation coefficient.
alternative label: HU
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: relative unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

electromagnetic unit
type: Concept
definition: a unit which is a standard measure of some aspect of electromagnetic force. electricity, or magnetism.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: unit
narrower: electric current unit
narrower: electric potential difference unit
narrower: electrical conduction unit
narrower: electrical conductivity unit
narrower: electrical resistivity unit
narrower: light unit
narrower: magnetic field strength unit
narrower: magnetic flux density unit
narrower: magnetic moment unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

ampere
type: Concept
definition: an electric current unit which is equal to the constant current which, if maintained in two straight parallel conductors of infinite length, of negligible circular cross-section, and placed 1 m apart in vacuum, would produce between these conductors a force equal to 2 x 10^[-7] newton per meter of length (Credit: Units of measurement ontology).
alternative label: A
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: electric current unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

milliampere
type: Concept
definition: an electric current unit which is equal to one thousandth of an ampere or 10^[-3] A.
alternative label: mA
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: electric current unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

kiloampere
type: Concept
definition: an electric current unit which is equal to one thousand amperes or 10^[3] A.
alternative label: kA
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: electric current unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

angle unit
type: Concept
definition: a unit which is a standard measure of the figure or space formed by the junction of two lines or planes (Credit: Units of measurement ontology).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: unit
narrower: arcminute
narrower: arcsecond
narrower: degree
narrower: radian
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

degree
type: Concept
definition: an angle unit which is equal to 1/360 of a full rotation or 1.7453310^[-2] rad (Credit: Units of measurement ontology).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: angle unit
narrower: degree east
narrower: degree north
narrower: degree south
narrower: degree west
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

arcminute
type: Concept
definition: an angle unit which is equal to 1/60 of a degree.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: angle unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

arcsecond
type: Concept
definition: an angle unit which is equal to 1/60 of an arcminute.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: angle unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

alkenone unsaturation index
type: Concept
definition: an organic compound index that compares the relative abundances of different alkenones in a sample.
alternative label: Uk37
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: organic compound index
narrower: alkenone unsaturation index Uk37
narrower: alkenone unsaturation index Uk37 prime
narrower: alkenone unsaturation index Ume36
related: instrumental
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

alkali feldspar series
type: Concept
definition: feldspar group minerals that are rich in sodium or potassium.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: feldspar group
narrower: anorthoclase
narrower: potassium feldspar
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

n-alkane
type: Concept
definition: an alkane that has a linear, or straight chain, structure.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: alkane
narrower: C20 n-alkane
narrower: C21 n-alkane
narrower: C22 n-alkane
narrower: C23 n-alkane
narrower: C24 n-alkane
narrower: C25 n-alkane
narrower: C26 n-alkane
narrower: C27 n-alkane
narrower: C28 n-alkane
narrower: C29 n-alkane
narrower: C30 n-alkane
narrower: C31 n-alkane
narrower: C32 n-alkane
narrower: C33 n-alkane
narrower: C34 n-alkane
narrower: C35 n-alkane
narrower: C36 n-alkane
narrower: C37 n-alkane
narrower: C38 n-alkane
narrower: C39 n-alkane
narrower: C40 n-alkane
narrower: methane
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

C27 n-alkane
type: Concept
definition: a n-alkane with the chemical formula C27H56.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: n-alkane
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

C29 n-alkane
type: Concept
definition: a n-alkane with the chemical formula C29H60.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: n-alkane
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

C31 n-alkane
type: Concept
definition: a n-alkane with the chemical formula C31H64.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: n-alkane
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

C33 n-alkane
type: Concept
definition: a n-alkane with the chemical formula C33H68.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: n-alkane
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

energy-dispersive x-ray fluorescence spectroscopy
type: Concept
definition: x-ray fluorescence spectroscopy in which the energy spectrum of the X-rays emitted due to core-to-core transitions is measured using a semiconductor detector (Credit: Chemical Methods Ontology).
alternative label: ED-XRF
alternative label: scanning XRF
alternative label: scanning x-ray fluorescence spectroscopy
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: x-ray fluorescence spectroscopy
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

laser particle size analysis
type: Concept
definition: particle size analysis that measures the angular variation in intensity of light scattered as a laser beam passes through a dispersed particulate sample (Credit: Malvern).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: particle size analysis
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

millitesla
type: Concept
definition: a magnetic flux density unit which is equal to one thousandth of a weber per square meter.
alternative label: mT
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: magnetic flux density unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

radiocarbon year before present
type: Concept
definition: an age unit of years, derived from radiocarbon dating without calibration to actual years, before present with present defined as 1950 Common Era. Times after 1950 CE are expressed as negative values.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: age unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

depth at sample end
type: Concept
definition: the location of the youngest end of a sample measured as a distance from some datum, usually the core top.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: depth
related: borehole
related: climate forcing
related: climate reconstructions
related: corals and sclerosponges
related: fire history
related: ice cores
related: loess and paleosol
related: paleoceanography
related: paleolimnology
related: speleothems
related: tree ring
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

depth at sample start
type: Concept
definition: the location of the oldest end of a sample measured as a distance from some datum, usually the core top.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: depth
related: borehole
related: climate forcing
related: climate reconstructions
related: corals and sclerosponges
related: fire history
related: ice cores
related: loess and paleosol
related: paleoceanography
related: paleolimnology
related: speleothems
related: tree ring
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

acetate
type: Concept
definition: a carbonyl compound with the formula C2H3O2(-).
alternative label: C2H3O2-
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: carbonyl compound
related: ice cores
created: 2018-03-26 00:00:00.0
modified: 2021-04-19 13:32:49.0

argon
type: Concept
definition: a chemical element with atomic number 18.
alternative label: Ar
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or single-element molecule
related: ice cores
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

azimuth
type: Concept
definition: the angle between a reference vector and a vector between an observer and a point of interest that is projected into the reference plane orthogonal to the zenith.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: angle
related: ice cores
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

beta activity
type: Concept
definition: an electromagnetic property that measures the emission of beta particles by a material.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: electromagnetic property
related: ice cores
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

chlorite
type: Concept
definition: a silicate mineral with the general formula (Mg, Fe2+, Fe3+)6AlSi3O10(OH)10.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: silicate mineral
narrower: chamosite
narrower: clinochlore
related: ice cores
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

36Cl
type: Concept
definition: the concentration of a radioactive isotope of chlorine with 19 neutrons.
alternative label: chlorine-36
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: single isotope concentration
related: ice cores
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

delta 40Ar
type: Concept
definition: the ratio of two isotopes of argon, 40Ar/36Ar, in a sample compared to that of a standard, as in: ((40Ar/36Ar sample)/(40Ar/36Ar standard) - 1) x 1000.
alternative label: d40Ar
alternative label: delta Ar40
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: isotope ratio
related: ice cores
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

dysprosium
type: Concept
definition: a chemical element with atomic number 66.
alternative label: Dy
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or single-element molecule
related: ice cores
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

143Nd/144Nd
type: Concept
definition: the ratio of a stable isotope of neodymium with 83 neutrons with a radioactive isotope of neodymium with 84 neutrons.
alternative label: neodymium-143/neodymium-144
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: isotope ratio
narrower: epsilon neodymium
related: ice cores
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

epsilon neodymium
type: Concept
definition: the ratio of 143Nd/144Nd in a sample compared to that of a standard, typically the chondritic uniform reservoir line, as in: ((143Nd/144Nd sample)/(143Nd/144Nd standard) - 1) x 10000.
alternative label: epsilon Nd
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 143Nd/144Nd
related: ice cores
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

erbium
type: Concept
definition: a chemical element with atomic number 68.
alternative label: Er
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or single-element molecule
related: ice cores
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

europium
type: Concept
definition: a chemical element with atomic number 63.
alternative label: Eu
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or single-element molecule
related: ice cores
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

formaldehyde
type: Concept
definition: a carbonyl compound with the formula CH2O.
alternative label: methanal
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: carbonyl compound
related: ice cores
created: 2018-03-26 00:00:00.0
modified: 2021-04-19 13:33:46.0

gadolinium
type: Concept
definition: a chemical element with atomic number 64.
alternative label: Gd
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or single-element molecule
related: ice cores
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

helium
type: Concept
definition: a chemical element with atomic number 2.
alternative label: He
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or single-element molecule
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

3He
type: Concept
definition: the concentration of a stable isotope of helium with 1 neutron.
alternative label: helium-3
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: single isotope concentration
related: ice cores
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

4He
type: Concept
definition: the concentration of a stable isotope of helium with 2 neutrons.
alternative label: helium-4
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: single isotope concentration
related: ice cores
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

3He/4He
type: Concept
definition: the ratio of a stable isotope of helium with 1 neutron and a stable isotope of helium with 2 neutrons.
alternative label: helium-3/helium-4
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: isotope ratio
related: ice cores
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

holmium
type: Concept
definition: a chemical element with atomic number 67.
alternative label: Ho
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or single-element molecule
related: ice cores
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

illite
type: Concept
definition: a mica group mineral with the formula: K0.65 Al2.0 [Al0.65 Si3.35 O10] (OH2).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: mica group
related: ice cores
related: loess and paleosol
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

inclination
type: Concept
definition: the angle between the vector between an observer and a point of interest and the vector that is created by projecting this into the reference plane orthogonal to the zenith.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: angle
related: ice cores
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

84Kr/36Ar
type: Concept
definition: the ratio of a stable isotope of krypton with 48 neutrons and a stable isotope of argon with 18 neutrons.
alternative label: krypton-84/argon-36
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: isotope ratio
related: ice cores
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

lutetium
type: Concept
definition: a chemical element with atomic number 71.
alternative label: Lu
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or single-element molecule
related: ice cores
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

mica group
type: Concept
definition: a silicate mineral with the general formula (K,Na,Ca)(Mg,Fe,Li,Al)2-3(Al,Si)4O10(OH,F)2.
alternative label: phengite
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: silicate mineral
narrower: biotite series
narrower: glauconite
narrower: illite
narrower: muscovite
narrower: polylithionite
related: ice cores
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

nitrite
type: Concept
definition: an inorganic compound that has the chemical formula NO2(-).
alternative label: NO2-
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: inorganic compound
related: ice cores
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

nitrogen gas
type: Concept
definition: nitrogen that exists as a diatomic gas.
alternative label: N2
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: nitrogen
related: ice cores
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

sulfate
type: Concept
definition: an inorganic compound that has the formula SO4(2-).
alternative label: SO4(2-)
alternative label: sulphate
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: inorganic compound
narrower: non-sea-salt sulfate
related: ice cores
related: instrumental
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

non-sea-salt sulfate
type: Concept
definition: sulfate that is derived from sources other than sea salt.
alternative label: nss sulfate
alternative label: nss sulphate
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: sulfate
related: ice cores
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

oxygen gas
type: Concept
definition: oxygen that exists as a diatomic gas.
alternative label: O2
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: oxygen
narrower: dissolved oxygen
related: ice cores
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

207Pb/204Pb
type: Concept
definition: the ratio of a stable isotope of lead with 125 neutrons and a stable isotope of lead with 122 neutrons.
alternative label: lead-207/lead-204
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: isotope ratio
related: ice cores
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

207Pb/206Pb
type: Concept
definition: the ratio of a stable isotope of lead with 125 neutrons and a stable isotope of lead with 124 neutrons.
alternative label: lead-207/lead-206
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: isotope ratio
related: ice cores
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

208Pb/204Pb
type: Concept
definition: the ratio of a stable isotope of lead with 126 neutrons and a stable isotope of lead with 122 neutrons.
alternative label: lead-208/lead-204
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: isotope ratio
related: ice cores
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

208Pb/206Pb
type: Concept
definition: the ratio of a stable isotope of lead with 126 neutrons and a stable isotope of lead with 124 neutrons.
alternative label: lead-208/lead-206
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: isotope ratio
related: ice cores
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

210Pb
type: Concept
definition: the concentration of a radioactive isotope of lead with 128 neutrons.
alternative label: Pb-210
alternative label: lead-210
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: single isotope concentration
related: ice cores
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

rock
type: Concept
definition: a bulk geological material that is an aggregate of one or more minerals (e.g., granite, shale, marble) or a body of undifferentiated mineral matter (e.g., obsidian) or of solid organic matter (e.g., coal) (Credit: Dictionary of Geological Terms).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: bulk geological material
related: borehole
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

borehole logging
type: Concept
definition: a field method in which in situ physical measurements (e.g., temperature) are made down the length of a borehole by lowering measurement instruments down the borehole via cable.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: field method
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

samarium
type: Concept
definition: a chemical element with atomic number 62.
alternative label: Sm
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or single-element molecule
related: ice cores
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

sea salt
type: Concept
definition: a bulk geological material that is derived from the evaporation of sea water and that consists of sodium chloride with other trace elements.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: bulk geological material
related: ice cores
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

sea-salt sodium
type: Concept
definition: sodium that is derived from sea salt.
alternative label: ss Na
alternative label: ss sodium
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: sodium
related: ice cores
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

smectite
type: Concept
definition: a silicate mineral with the general formula A0.3 Al2[Si4O10]Z2·nH2O where A is Na+, K+, Mg2+, Ca2+ or other.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: silicate mineral
narrower: saponite
related: ice cores
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

sulfuric acid
type: Concept
definition: an inorganic compound that has the chemical formula H2SO4.
alternative label: H2SO4
alternative label: sulphuric acid
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: inorganic compound
related: ice cores
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

thulium
type: Concept
definition: a chemical element with atomic number 69.
alternative label: Tm
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or single-element molecule
related: ice cores
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

3H
type: Concept
definition: the concentration of a radioactive isotope of hydrogen with 2 neutrons.
alternative label: T
alternative label: hydrogen-3
alternative label: tritium
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: single isotope concentration
related: ice cores
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

132Xe/36Ar
type: Concept
definition: the ratio of a stable isotope of xenon with 78 neutrons and a stable isotope of argon with 18 neutrons.
alternative label: Xe132/Ar36
alternative label: xenon-132/argon-36
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: isotope ratio
related: ice cores
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

ytterbium
type: Concept
definition: a chemical element with atomic number 70.
alternative label: Yb
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or single-element molecule
related: ice cores
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

empirical orthogonal function
type: Concept
definition: a multivariate eigenvector-based variable that is one of a set of linearly uncorrelated spatial patterns that are derived using an orthogonal transformation on a set of continuous data observations.
alternative label: EOF
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: multivariate eigenvector-based variable
related: climate reconstructions
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

68% confidence interval lower bound
type: Concept
definition: the lower (minimum) bound of the confidence interval that captures the true value 68% of the time.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: confidence interval
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

68% confidence interval upper bound
type: Concept
definition: the upper (maximum) bound of the confidence interval that captures the true value 68% of the time.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: confidence interval
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

geopotential height
type: Concept
definition: a circulation length variable that is the vertical coordinate referenced to Earth's mean sea level that contains an adjustment for the variation of gravity with latitude and elevation.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: circulation length variable
related: climate reconstructions
related: historical
related: instrumental
related: paleoclimatic modeling
related: tree ring
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

evapotranspiration
type: Concept
definition: the hydroclimatic rate of water transfer from the land to the atmosphere from the soil and other surfaces and from transpiration from plants.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: hydroclimate rate
related: climate reconstructions
related: instrumental
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

biome
type: Concept
definition: an ecosystem index that describes a distinct biological community that formed in response to a shared physical climate.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: ecosystem index
related: climate reconstructions
related: instrumental
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

Southern Oscillation Index
type: Concept
definition: a circulation index of the El Niño Southern Oscillation that is calculated as the difference in atmospheric pressure at sea level between Tahiti and Darwin (Australia).
alternative label: SOI
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: El Niño Southern Oscillation Index
related: climate reconstructions
related: instrumental
related: paleoceanography
related: paleolimnology
related: tree ring
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

El Niño Southern Oscillation Index
type: Concept
definition: a circulation index that quantifies some aspect, atmospheric or oceanic, of the El Niño Southern Oscillation.
alternative label: ENSO
alternative label: ENSO Index
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: circulation index
narrower: El Niño event
narrower: La Niña event
narrower: Niño 1+2 sea surface temperature index
narrower: Niño 3 sea surface temperature index
narrower: Niño 3.4 sea surface temperature index
narrower: Niño 4 sea surface temperature index
narrower: Southern Oscillation Index
related: climate reconstructions
related: ice cores
related: instrumental
related: tree ring
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

growing degree days
type: Concept
definition: a temperature index that integrates warmth above a base temperature (usually 10 degrees Celsius) through time.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: temperature index
related: climate reconstructions
related: instrumental
related: tree ring
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

Pacific Decadal Oscillation Index
type: Concept
definition: a circulation index that is calculated as the normalized first principal component of monthly sea surface temperature anomalies over the Pacific Ocean north of 20 degrees north latitude after the global average sea surface temperature has been removed.
alternative label: PDO
alternative label: PDO Index
alternative label: PDOI
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: circulation index
related: climate reconstructions
related: corals and sclerosponges
related: historical
related: instrumental
related: tree ring
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

Palmer Drought Severity Index
type: Concept
definition: a hydroclimate index that employs temperature and precipitation information to estimate relative dryness taking into consideration the cumulative nature of long-term drought.
alternative label: PDSI
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: hydroclimate index
related: climate reconstructions
related: corals and sclerosponges
related: instrumental
related: tree ring
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

Palmer Hydrologic Drought Index
type: Concept
definition: a hydroclimate index that employs temperature and precipitation information to estimate hydrological impacts of drought (e.g., reservoir levels, groundwater levels, etc) taking into consideration the cumulative nature of long-term drought.
alternative label: PHDI
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: hydroclimate index
related: climate reconstructions
related: instrumental
related: tree ring
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

sea level
type: Concept
definition: a geographic variable that quantifies the height of the sea's surface.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: geographic variable
narrower: eustatic sea level
narrower: relative sea level
narrower: steric sea level change
related: climate reconstructions
related: corals and sclerosponges
related: instrumental
related: paleoceanography
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-08-14 16:22:11.0

streamflow
type: Concept
definition: the hydroclimatic rate of flow of water in streams, rivers, and other channels.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: hydroclimate rate
related: climate reconstructions
related: corals and sclerosponges
related: historical
related: instrumental
related: paleoclimatic modeling
related: paleolimnology
related: tree ring
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

tropical cyclone
type: Concept
definition: a storm variable that quantifies the occurrence of rotating, organized systems of clouds and thunderstorms that originate over tropical or subtropical waters and have a closed low-level circulation.
alternative label: hurricane
alternative label: typhoon
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: storm variable
related: climate reconstructions
related: corals and sclerosponges
related: historical
related: instrumental
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

water table depth
type: Concept
definition: a geographic variable that quantifies the depth from the land surface to the upper surface of the zone of saturation in the soil.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: geographic variable
related: climate reconstructions
related: instrumental
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-08-14 16:23:34.0

modern analogue technique
type: Concept
definition: an analogue method that uses modern observations as the set of standards against which a sample is compared.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: analogue method
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

principal component analysis
type: Concept
definition: a statistical analysis method that uses an orthogonal transformation to convert a set of observations of possibly correlated variables into a set of values of linearly uncorrelated variables called principal components (Credit: Wikipedia).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: statistical analysis method
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

kaolinite
type: Concept
definition: a silicate mineral with the formula: Al2(Si2O5)(OH)4.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: silicate mineral
narrower: dickite
related: ice cores
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

age at sample start
type: Concept
definition: the age, either directly measured or inferred, at the oldest end of the sample.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: age
related: borehole
related: climate forcing
related: climate reconstructions
related: corals and sclerosponges
related: fire history
related: historical
related: ice cores
related: loess and paleosol
related: paleoceanography
related: paleolimnology
related: speleothems
related: tree ring
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

age at sample end
type: Concept
definition: the age, either directly measured or inferred, at the youngest end of the sample.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: age
related: borehole
related: climate forcing
related: climate reconstructions
related: corals and sclerosponges
related: fire history
related: historical
related: ice cores
related: loess and paleosol
related: paleoceanography
related: paleolimnology
related: speleothems
related: tree ring
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

deuterium excess
type: Concept
definition: a measure of how different a delta 2H value is from the value expected from the Global Meteoric Water Line, that is delta 2H - 8* delta 18O.
alternative label: 2H excess
alternative label: d-excess
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: delta 2H
related: ice cores
related: instrumental
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

delta 15N excess
type: Concept
definition: a measure of the deviation of a delta 15N value from the value calculated from delta 40Ar measured on the same sample assuming that differences between the two isotopic ratios are caused only by differences in gravitational settling, that is delta 15N - delta 40Ar/4. This quantity is used to reconstruct temperature.
alternative label: d15N excess
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: delta 15N
related: ice cores
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

grain size beta
type: Concept
definition: a measure of the slope of the best-fit line to the grain size distribution. Lower beta values reflect a coarser grain size distribution and higher beta values reflect a finer grain size distribution.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: grain size parameter
related: ice cores
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

14CO/(14CO+14CO2)
type: Concept
definition: the ratio of the concentration of carbon monoxide containing the radioactive isotope of carbon with 8 neutrons to the sum of the concentrations of carbon monoxide and carbon dioxide containing the same radioactive isotope.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: isotope ratio
related: ice cores
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

delta CO2/N2
type: Concept
definition: an elemental ratio that describes the ratio of carbon dioxide to nitrogen gas in a sample compared to the same ratio in a standard with units of per meg (or per mil), that is: ((CO2/N2 sample)/(CO2/N2 standard) - 1) x 10^[6] (or x 10^[3]).
alternative label: delta carbon dioxide/nitrogen
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or compound ratio
related: ice cores
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

delta Ar/N2
type: Concept
definition: an elemental ratio that describes the ratio of argon to nitrogen gas in a sample compared to the same ratio in a standard with units of per meg (or per mil), that is: ((Ar/N2 sample)/(Ar/N2 standard) - 1) x 10^[6] (or x 10^[3]).
alternative label: delta argon/nitrogen
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or compound ratio
related: ice cores
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

delta O2/Ar
type: Concept
definition: an elemental ratio that describes the ratio of oxygen gas to argon in a sample compared to the same ratio in a standard with units of per meg (or per mil), that is: ((O2/Ar sample)/(O2/Ar standard) - 1) x 10^[6] (or x 10^[3]).
alternative label: delta oxygen/argon
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or compound ratio
related: ice cores
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

delta O2/N2
type: Concept
definition: an elemental ratio that describes the ratio of oxygen gas to nitrogen gas in a sample compared to the same ratio in a standard with units of per meg (or per mil), that is: ((O2/N2 sample)/(O2/N2 standard) - 1) x 10^[6] (or x 10^[3]).
alternative label: delta oxygen/nitrogen
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or compound ratio
related: ice cores
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

lock-in depth
type: Concept
definition: a formation property that quantifies the depth in a glacer or ice sheet at which atmospheric air is locked into bubbles within the ice.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: formation property
related: ice cores
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

thinning function
type: Concept
definition: a formation property that quantifies the thinning of layers in a glacier or ice sheet related to ice flow and deformation.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: formation property
related: ice cores
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

factor score
type: Concept
definition: a mutivariate eigenvector-based variable that is one of a set of linearly uncorrelated independent latent variables that are derived using an orthogonal transformation on a set of continuous data observations.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: multivariate eigenvector-based variable
related: climate reconstructions
related: ice cores
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

silicate mineral
type: Concept
definition: an identified mineral whose crystal structure contains SiO4 tetrahedra.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: identified mineral
narrower: almandine
narrower: amphibole
narrower: andradite
narrower: chkalovite
narrower: chlorite
narrower: cordierite
narrower: cristobalite
narrower: elpidite
narrower: feldspar group
narrower: gaultite
narrower: kaolinite
narrower: mica group
narrower: pyrope
narrower: pyroxene
narrower: quartz
narrower: serpentine
narrower: smectite
narrower: titanite
narrower: zircon
related: ice cores
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

sample spacing method
type: Concept
definition: a sampling method that determines the contiguity of samples from an archive (e.g., a core).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: sampling method
narrower: bulk sample
narrower: continuous line
narrower: discrete spot
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

gas extraction method
type: Concept
definition: a sampling method that relates to the extraction of gas from bubbles in ice cores.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: sampling method
narrower: mechanical dry extraction
narrower: sublimation
narrower: wet extraction
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

mechanical dry extraction
type: Concept
definition: a gas extraction method in which gas is liberated through mechanical rupturing of the ice (e.g., milling, shaving, cracking, grinding).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: gas extraction method
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

wet extraction
type: Concept
definition: a gas extraction method in which gas is liberated through melting of the ice.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: gas extraction method
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

electric sensing particle size analysis
type: Concept
definition: particle size analysis that measures changes in electrical resistance as particles in an electrolyte solution are drawn through an orifice.
alternative label: coulter counter
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: particle size analysis
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

electrical conductivity measurement
type: Concept
definition: a laboratory method to measure how well a solution conducts electricity.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: laboratory method
narrower: alternating current electrical conductivity measurement
narrower: dielectric profiling
narrower: direct current electrical conductivity measurement
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

direct current electrical conductivity measurement
type: Concept
definition: an electrical conductivity measurement in which two electrodes with a direct current potential difference are applied to a material and the current flowing through the material is measured, yielding information about hydrogen ions (acidity).
alternative label: ECM
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: electrical conductivity measurement
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

alternating current electrical conductivity measurement
type: Concept
definition: an electrical conductivity measurement in which two electrodes with an alternating current potential difference are applied to a material and the conductance of the material is measured, yielding information about ion content.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: electrical conductivity measurement
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

oxide and hydroxide minerals
type: Concept
definition: an identified mineral that is characterized by the linkage of oxygen or hydroxide (OH) with one or more metallic elements (Credit: Dictionary of Geological Terms).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: identified mineral
narrower: billietite
narrower: birnessite
narrower: bismite
narrower: chrysoberyl
narrower: goethite
narrower: hematite group
narrower: maghemite
narrower: magnetite
related: ice cores
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

air content
type: Concept
definition: a measure of the amount of air that is contained within a material.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: porosity
related: ice cores
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

ion balance
type: Concept
definition: a solution property that is the sum of the concentration of cations minus the concentration of anions.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: solution property
related: ice cores
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

atomic absorption spectroscopy
type: Concept
definition: atomic spectroscopy in which the sample is illuminated with ultraviolet or visible light which is absorbed by the non-excited atoms at characteristic wavelengths (Chemical Methods Ontology).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: atomic spectroscopy
narrower: flame atomic absorption spectrometry
narrower: graphite furnace atomic absorption spectrometry
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

flame atomic absorption spectrometry
type: Concept
definition: atomic absorption spectrometry in which the sample is aspirated, aerosolized, and mixed with combustible gases, such as acetylene and air or acetylene and nitrous oxide. The mixture is then ignited and atomized in a flame whose temperature ranges from 2100-2800 degrees Celsius. During combustion, atoms of the element of interest in the sample absorb light at characteristic wavelengths (Credit: Chemical Methods Ontology).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: atomic absorption spectroscopy
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

mass spectrometry
type: Concept
definition: spectroscopy in which the sample is converted into gaseous ions which are characterized by their mass-to-charge ratio and relative abundance (Credit: Chemical Methods Ontology).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: spectroscopy
narrower: accelerator mass spectrometry
narrower: electrospray ionization mass spectrometry
narrower: inductively-coupled plasma mass spectrometry
narrower: isotope ratio mass spectrometry
narrower: secondary ion mass spectrometry
narrower: thermal ionization mass spectrometry
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

multiple collector inductively-coupled plasma mass spectrometry
type: Concept
definition: inductively-coupled plasma mass spectrometry in which the sample is ionized in a plasma (a partially ionized gas such as Ar containing free electrons) which has been generated by electromagnetic induction. A series of collectors is used to detect several ion beams simultaneously (Credit: Chemical Methods Ontology).
alternative label: MC ICP-MS
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: inductively-coupled plasma mass spectrometry
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

single collector inductively-coupled plasma mass spectrometry
type: Concept
definition: inductively-coupled plasma mass spectrometry in which the sample is ionized in a plasma (a partially ionized gas such as Ar containing free electrons) which has been generated by electromagnetic induction. A single collector is used (Credit: Chemical Methods Ontology).
alternative label: SC-ICP-MS
alternative label: quadrupole ICP-MS
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: inductively-coupled plasma mass spectrometry
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

x-ray spectroscopy
type: Concept
definition: spectroscopy in which the absorption or emission of X-rays is detected (Credit: Chemical Methods Ontology).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: spectroscopy
narrower: electron probe x-ray microanalysis
narrower: x-ray fluorescence spectroscopy
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

laser spectroscopy
type: Concept
definition: spectroscopy in which the sample is illuminated with one or more laser beams and the absorption or emission of light by the sample is measured (Credit: Chemical Methods Ontology).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: spectroscopy
narrower: cavity ring-down spectroscopy
narrower: optical feedback cavity enhanced absorption spectroscopy
narrower: tunable diode laser absorption spectroscopy
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

sampling metadata
type: Concept
definition: metadata about a sample that appears in the data table, generally as part of a core-top calibration study, gridded data product, or the like.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: what
narrower: collection date
narrower: collection elevation
narrower: collection water depth
narrower: latitude
narrower: longitude
narrower: notes
narrower: number of samples
narrower: sample identification
narrower: sample thickness
narrower: surface geopotential
narrower: surface type
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

sample identification
type: Concept
definition: sampling metadata that designates either a widely-used or lab-specific name for a sample and which can contain such attributes as core, section, and/or site.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: sampling metadata
narrower: International Geo Sample Number
related: borehole
related: climate forcing
related: climate reconstructions
related: corals and sclerosponges
related: fire history
related: historical
related: ice cores
related: instrumental
related: loess and paleosol
related: paleoceanography
related: paleolimnology
related: speleothems
related: tree ring
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

notes
type: Concept
definition: sampling metadata that describes study-specific aspects of sample collection and/or analysis.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: sampling metadata
related: borehole
related: climate forcing
related: climate reconstructions
related: corals and sclerosponges
related: fire history
related: historical
related: ice cores
related: instrumental
related: loess and paleosol
related: paleoceanography
related: paleoclimatic modeling
related: paleolimnology
related: speleothems
related: tree ring
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

Orbicella annularis
type: Concept
definition: a particular species of the genus Orbicella that is commonly known as the Caribbean star coral or the boulder star coral.
alternative label: Montastraea annularis
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: Orbicella sp.
related: corals and sclerosponges
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

x-radiography
type: Concept
definition: image analysis using x-rays to view the internal structure of a material.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: image analysis
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

computed tomography
type: Concept
definition: image analysis in which many individual images, often from x-radiography, are taken and processed by a computer to generate cross-sectional (tomographic) views.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: image analysis
narrower: micro computed tomography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

micro computed tomography
type: Concept
definition: computed tomography conducted at high resolution to image small-scale structures of a material.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: computed tomography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

lithium/calcium
type: Concept
definition: the elemental ratio of lithium to calcium.
alternative label: Li/Ca
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or compound ratio
related: corals and sclerosponges
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

peat
type: Concept
definition: a bulk biological material that consists of an unconsolidated combustible deposit of partially carbonized plant remains, common in bogs, fens, and lakes in tundra or periglacial regions (Credit: Smol et al. 2001 Tracking Environmental Change Using Lake Sediments).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: bulk biological material
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

wet sediment
type: Concept
definition: sediment that contains water.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: sediment
related: fire history
related: loess and paleosol
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

dry sediment
type: Concept
definition: sediment from which all water has been removed.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: sediment
related: fire history
related: loess and paleosol
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

organic matter
type: Concept
definition: a bulk biological material that consists of complex substances of mainly carbon, hydrogen, and oxygen with subordinate amounts of nitrogen, sulfur, and other elements, produced by the growth of organisms (Credit: Smol et al. 2001 Tracking Environmental Change Using Lake Sediments).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: bulk biological material
related: loess and paleosol
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

calcium carbonate
type: Concept
definition: a carbonate with the chemical formula CaCO3 but of unspecified crystal structure.
alternative label: CaCO3
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: carbonate
narrower: aragonite
narrower: calcite
narrower: mixed calcite/aragonite
related: paleoceanography
related: paleoclimatic modeling
related: paleolimnology
related: speleothems
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

calcite
type: Concept
definition: a calcium carbonate with rhombohedral crystal structure.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: calcium carbonate
related: paleoceanography
related: paleolimnology
related: speleothems
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

aragonite
type: Concept
definition: a calcium carbonate with orthorhombic crystal structure.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: calcium carbonate
related: paleolimnology
related: speleothems
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

mixed calcite/aragonite
type: Concept
definition: a calcium carbonate with mixed orthorhombic and rhombohedral crystal structure.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: calcium carbonate
related: speleothems
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

clay
type: Concept
definition: the abundance or concentration of particles with a diameter less than 0.004 millimeters.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: grain size class
related: loess and paleosol
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

sand
type: Concept
definition: the abundance or concentration of particles with a diameter between 0.0625 and 2 millimeters.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: grain size class
related: loess and paleosol
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

silt
type: Concept
definition: the abundance or concentration of particles with a diameter between 0.004 and 0.0625 millimeters.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: grain size class
related: loess and paleosol
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

bulk geological material
type: Concept
definition: a geological material that consists of undifferentiated components, often from different sources.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: geological material
narrower: dust
narrower: mineral matter
narrower: particles
narrower: sea salt
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

ice rafted debris
type: Concept
definition: mineral matter that was transported over a body of water on ice.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: mineral matter
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

porosity
type: Concept
definition: a physical property that compares the volume or area of empty spaces in a material to the total volume or area.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: physical property
narrower: air content
narrower: water content
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

organic matter
type: Concept
definition: a bulk biological material that consists of complex substances of mainly carbon, hydrogen, and oxygen with subordinate amounts of nitrogen, sulfur, and other elements, produced by the growth of organisms (Credit: Smol et al. 2001 Tracking Environmental Change Using Lake Sediments).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: bulk biological material
related: fire history
related: loess and paleosol
related: paleoceanography
related: paleoclimatic modeling
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

grain size median
type: Concept
definition: the median (50th percentile) grain size in a sample.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: grain size parameter
related: loess and paleosol
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

grain size mode
type: Concept
definition: the most commonly occurring grain size in a sample.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: grain size parameter
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

organism
type: Concept
definition: a biological material that allows for the taxonomic identification, either broadly or generally, of an individual animal, plant, or single-celled life form.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: biological material
narrower: bivalve
narrower: cladoceran
narrower: coccolithophore
narrower: coral
narrower: coralline algae
narrower: diatom
narrower: fish
narrower: foraminifer
narrower: gastropod
narrower: midge
narrower: ostracod
narrower: sponge
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

organic compound
type: Concept
definition: a compound that consists of one or more atoms of carbon covalently linked to atoms of other elements, most commonly hydrogen, oxgen, or nitrogen.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: compound
narrower: aromatic compound
narrower: hydrocarbon
narrower: organic hydroxy compound
narrower: organooxygen compound
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

diatom
type: Concept
definition: an identifiable organism that is a unicellular phytoplankton and that belongs to the kingdom Chromista, phylum Ochrophyta, class Bacillariophyceae.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: organism
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

midge
type: Concept
definition: an identifiable organism that belongs to one of several families in the kingdom Animalia, phylum Arthropoda, class Insecta, order Diptera.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: organism
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

earlywood density
type: Concept
definition: the density of xylem cells in wood that formed in the beginning of the growing season and that tend to be large and thin-walled.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: density
related: tree ring
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

latewood density
type: Concept
definition: the density of xylem cells in wood that formed near the end of the growing season and that tend to be small and thick-walled.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: density
related: tree ring
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

total ring density
type: Concept
definition: the density of the wood within one annual ring from a tree.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: density
related: tree ring
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

earlywood width
type: Concept
definition: the width of the segment of an annual radial growth increment in a tree that formed early in the growing season and that tends to consist of large and thin-walled cells.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: width
related: tree ring
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

latewood width
type: Concept
definition: the width of the segment of an annual radial growth increment in a tree that formed late in the growing season and that tends to consist of small and thick-walled cells.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: width
related: tree ring
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

total ring width
type: Concept
definition: the width of an annual radial growth increment in a tree.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: width
related: tree ring
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

average cell wall thickness
type: Concept
definition: the average thickness of a cell wall in a tree.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: thickness
related: tree ring
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

tracheid diameter
type: Concept
definition: the diameter of elongated cells in the xylem of vascular plants.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: diameter
narrower: earlywood tracheid diameter
related: tree ring
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

angle
type: Concept
definition: a physical property that is the ratio of the length of a circular arc to its radius.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: physical property
narrower: average microfibril angle
narrower: azimuth
narrower: inclination
related: tree ring
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

average microfibril angle
type: Concept
definition: the mean angle between the direction of cellulose microfibrils and the long axis of the cell in wood.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: angle
related: tree ring
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

blue intensity
type: Concept
definition: a component of the RGB color system that measures the level of blue light required to produce the color of a substance.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: RGB color system
related: ice cores
related: paleoceanography
related: paleolimnology
related: tree ring
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

earth system variable
type: Concept
definition: quantities, processes, properties, and phenomena of the Earth system that can be either reconstructed from proxies or directly measured.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: what
narrower: chemical variable
narrower: circulation variable
narrower: cryospheric variable
narrower: ecosystem variable
narrower: energy variable
narrower: forcing variable
narrower: geographic variable
narrower: hydroclimatic variable
narrower: societal event
narrower: temperature variable
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

latewood
type: Concept
definition: wood that formed late in the growing season and that tends to consist of small and thick-walled cells.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: wood
related: tree ring
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

earlywood cellulose
type: Concept
definition: cellulose from wood that formed early in the growing season and that tends to consist of large and thin-walled cells.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: cellulose
related: tree ring
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

earlywood alpha cellulose
type: Concept
definition: alpha cellulose from wood that formed early in the growing season and that tends to consist of large and thin-walled cells.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: alpha cellulose
related: tree ring
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

latewood alpha cellulose
type: Concept
definition: alpha cellulose from wood that formed late in the growing season and that tends to consist of small and thick-walled cells.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: alpha cellulose
related: tree ring
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

latewood cellulose
type: Concept
definition: cellulose from wood that formed late in the growing season and that tends to consist of small and thick-walled cells.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: cellulose
related: tree ring
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

tree ring chronology method
type: Concept
definition: a computational method that is employed in the generation of a tree ring chronology (i.e., a tree ring standardized growth index).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: computational method
narrower: ARSTAN chronology method
narrower: low-pass filter chronology method
narrower: re-whitened residual chronology method
narrower: residual chronology method
narrower: signal-free chronology method
narrower: standard chronology method
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

ARSTAN chronology method
type: Concept
definition: a tree ring chronology method that uses Program ARSTAN, developed by Dr. Edward R. Cook at the Tree-Ring Laboratory, Lamont-Doherty Earth Observatory of Columbia University, Palisades, New York (Cook 1985), in its standard configuration but with autoregressive modeling to remove autocorrelation and further reincorporation of the pooled autoregression (persistence) into the resultant chronology.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: tree ring chronology method
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

residual chronology method
type: Concept
definition: a tree ring chronology method that uses Program ARSTAN, developed by Dr. Edward R. Cook at the Tree-Ring Laboratory, Lamont-Doherty Earth Observatory of Columbia University, Palisades, New York (Cook 1985), in its standard configuration but additionally using autoregressive modeling to remove autocorrelation.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: tree ring chronology method
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

re-whitened residual chronology method
type: Concept
definition: a tree ring chronology method that uses Program ARSTAN, developed by Dr. Edward R. Cook at the Tree-Ring Laboratory, Lamont-Doherty Earth Observatory of Columbia University, Palisades, New York (Cook 1985), and re-whitens residuals.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: tree ring chronology method
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

standard chronology method
type: Concept
definition: a tree ring chronology method that uses Program ARSTAN, developed by Dr. Edward R. Cook at the Tree-Ring Laboratory, Lamont-Doherty Earth Observatory of Columbia University, Palisades, New York (Cook 1985), in its standard configuration with no autoregressive modeling.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: tree ring chronology method
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

low-pass filter chronology method
type: Concept
definition: a tree ring chronology method that uses Program ARSTAN, developed by Dr. Edward R. Cook at the Tree-Ring Laboratory, Lamont-Doherty Earth Observatory of Columbia University, Palisades, New York (Cook 1985), and employs a low-pass filter.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: tree ring chronology method
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

organic compound
type: Concept
definition: a compound that consists of one or more atoms of carbon covalently linked to atoms of other elements, most commonly hydrogen, oxgen, or nitrogen.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: compound
narrower: aromatic compound
narrower: hydrocarbon
narrower: organic compound index
narrower: organic hydroxy compound
narrower: organic pigment
narrower: organohalogen compound
narrower: organooxygen compound
narrower: organosulfur compound
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

organism
type: Concept
definition: a biological material that allows for the taxonomic identification, either broadly or generally, of an individual animal, plant, or single-celled life form.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: biological material
narrower: brachiopod
narrower: chlorophyte
narrower: chrysophyte
narrower: cladoceran
narrower: coccolithophore
narrower: diatom
narrower: dinoflagellate
narrower: echinoid
narrower: fish
narrower: foraminifer
narrower: gastropod
narrower: insect
narrower: organism index
narrower: ostracod
narrower: radiolarian
narrower: silicoflagellate
narrower: sponge
narrower: testate amoeba
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

tetraether index of 86 carbon atoms
type: Concept
definition: an organic compound index that is calculated as the ratio of different isoprenoidal glycerol dialkyl glycerol tetraethers.
alternative label: TEX86
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: organic compound index
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

diatom
type: Concept
definition: an identifiable organism that is a unicellular phytoplankton and that belongs to the kingdom Chromista, phylum Ochrophyta, class Bacillariophyceae.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: organism
narrower: diatom index
narrower: identified diatom
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

137Cs
type: Concept
definition: the concentration of a radioactive isotope of cesium with 82 neutrons.
alternative label: caesium-137
alternative label: cesium-137
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: single isotope concentration
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

absorbance
type: Concept
definition: an electromagnetic property that measures the amount of light absorbed by a material as a beam of light passes through it.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: electromagnetic property
narrower: effective absorption cross section
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

canonical correspondence analysis axis
type: Concept
definition: an axis that is derived from extension of correspondence analysis in which there is an extra restriction that the axes be linear combinations of environmental variables.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: correspondence analysis axis
related: climate reconstructions
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

carotenoid
type: Concept
definition: an organic pigment that is produced by plants and algae as well as several bacteria and fungi, and that are formed from 8 isoprene (C5H8) molecules with or without additional oxygen atoms.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: organic pigment
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

chlorophyll
type: Concept
definition: an organic pigment that is any of several green pigments found in cyanobacteria and the chloroplasts of algae and plants and that is composed of carbon, hydrogen, oxygen, nitrogen, and magnesium.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: organic pigment
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

gamma radiation
type: Concept
definition: an electromagnetic property that measures the emission of gamma radiation by a material.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: electromagnetic property
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

mineral matter
type: Concept
definition: a bulk geological material that consists of particles composed of minerals.
alternative label: detrital matter
alternative label: detrital sediment
alternative label: exogenic sediment
alternative label: terrigenous matter
alternative label: terrigenous sediment
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: bulk geological material
narrower: ice rafted debris
narrower: tektite
narrower: volcanic material
related: loess and paleosol
related: paleoceanography
related: paleoclimatic modeling
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

peat
type: Concept
definition: a bulk biological material that consists of an unconsolidated combustible deposit of partially carbonized plant remains, common in bogs, fens, and lakes in tundra or periglacial regions (Credit: Smol et al. 2001 Tracking Environmental Change Using Lake Sediments).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: bulk biological material
narrower: humification index
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

red intensity
type: Concept
definition: a component of the RGB color system that measures the level of red light required to produce the color of a substance.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: RGB color system
related: ice cores
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

varve thickness
type: Concept
definition: the thickness of a sublayer of or an entire annually-resolved varve in a sediment sequence.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: thickness
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

aluminum/titanium
type: Concept
definition: the elemental ratio of aluminum to titanium.
alternative label: Al/Ti
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or compound ratio
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

silicon dioxide/phosphorus
type: Concept
definition: the ratio of silicon dioxide to phosphorus.
alternative label: SiO2/P
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or compound ratio
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

bromine
type: Concept
definition: a chemical element with atomic number 35.
alternative label: Br
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or single-element molecule
related: ice cores
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

calcium/titanium
type: Concept
definition: the elemental ratio of calcium to titanium.
alternative label: Ca/Ti
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or compound ratio
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

carbon/sulfur
type: Concept
definition: the elemental ratio of carbon to sulfur.
alternative label: C/S
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or compound ratio
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

iron/calcium
type: Concept
definition: the elemental ratio of iron to calcium.
alternative label: Fe/Ca
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or compound ratio
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

iron/manganese
type: Concept
definition: the elemental ratio of iron to manganese.
alternative label: Fe/Mn
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or compound ratio
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

iron/titanium
type: Concept
definition: the elemental ratio of iron to titanium.
alternative label: Fe/Ti
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or compound ratio
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

manganese/titanium
type: Concept
definition: the elemental ratio of manganese to titanium.
alternative label: Mn/Ti
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or compound ratio
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

niobium
type: Concept
definition: a chemical element with atomic number 41.
alternative label: Nb
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or single-element molecule
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

niobium/titanium
type: Concept
definition: the elemental ratio of niobium to titanium.
alternative label: Nb/Ti
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or compound ratio
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

nitrogen/phosphorus
type: Concept
definition: the elemental ratio of nitrogen to phosphorus.
alternative label: N/P
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or compound ratio
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

organic carbon/nitrogen
type: Concept
definition: the elemental ratio of organic carbon to nitrogen.
alternative label: C/N organic
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: carbon/nitrogen
related: loess and paleosol
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

palladium
type: Concept
definition: a chemical element with atomic number 46.
alternative label: Pd
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or single-element molecule
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

phosphorus/titanium
type: Concept
definition: the elemental ratio of phosphorus to titanium.
alternative label: P/Ti
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or compound ratio
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

potassium/titanium
type: Concept
definition: the elemental ratio of potassium to titanium.
alternative label: K/Ti
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or compound ratio
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

selenium
type: Concept
definition: a chemical element with atomic number 34.
alternative label: Se
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or single-element molecule
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

silicon
type: Concept
definition: a chemical element with atomic number 14.
alternative label: Si
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or single-element molecule
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

strontium/titanium
type: Concept
definition: the elemental ratio of strontium to titanium.
alternative label: Sr/Ti
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or compound ratio
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

sulfur/titanium
type: Concept
definition: the elemental ratio of sulfur to titanium.
alternative label: S/Ti
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or compound ratio
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

tantalum
type: Concept
definition: a chemical element with atomic number 73.
alternative label: Ta
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or single-element molecule
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

tungsten
type: Concept
definition: a chemical element with atomic number 74.
alternative label: W
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or single-element molecule
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

mineral index
type: Concept
definition: a summation or ratio of identified minerals that is significant to paleoclimate or paleoenvironment.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: identified mineral
related: ice cores
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

calcium oxide
type: Concept
definition: an inorganic compound that has the chemical formula CaO.
alternative label: CaO
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: inorganic compound
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

iron(III) oxide
type: Concept
definition: an inorganic compound that has the chemical formula Fe2O3.
alternative label: Fe2O3
alternative label: ferric oxide
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: iron oxide
related: loess and paleosol
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

potassium oxide
type: Concept
definition: an inorganic compound that has the chemical formula K2O.
alternative label: K2O
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: inorganic compound
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

manganese oxide
type: Concept
definition: an inorganic compound that is any of the oxides of manganese, containing oxygen and manganese atoms.
alternative label: MnO
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: inorganic compound
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

sodium oxide
type: Concept
definition: an inorganic compound that has the chemical formula Na2O.
alternative label: Na2O
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: inorganic compound
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

titanium dioxide
type: Concept
definition: an inorganic compound that has the chemical formula TiO2.
alternative label: TiO2
alternative label: titania
alternative label: titanium(IV) oxide
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: titanium oxide
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

branched glycerol dialkyl glycerol tetraether
type: Concept
definition: a glycerol dialkyl glycerol tetraether that has branched alkyl chains and that is of bacterial origin.
alternative label: branched GDGT
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: glycerol dialkyl glycerol tetraether
related: loess and paleosol
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

branched and isoprenoid tetraether index
type: Concept
definition: an organic compound index that is the abundance of branched tetraethers relative to isoprenoid tetraethers, indicative of the relative amounts of soil organic matter and aquatic organic matter.
alternative label: BIT index
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: organic compound index
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

cyclization index of branched tetraethers
type: Concept
definition: an organic compound index that is calculated from the ratio of branched tetraethers with one cyclopentane moiety to those with none and that is correlated to soil pH.
alternative label: CBT index
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: organic compound index
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

dinosterol
type: Concept
definition: a sterol that has the chemical formula C30H52O and that is synthesized by several genera of dinoflagellates.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: sterol
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

glycerol dialkyl glycerol tetraether
type: Concept
definition: an ether that is a tetraether membrane lipid and that contains between 0 and 4 cyclopentane moieties, with an increasing number of cyclopentane moieties related to the temperature of formation.
alternative label: GDGT
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: ether
narrower: branched glycerol dialkyl glycerol tetraether
narrower: isoprenoid glycerol dialkyl glycerol tetraether
related: loess and paleosol
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2021-04-19 13:21:40.0

isoprenoid glycerol dialkyl glycerol tetraether
type: Concept
definition: a glycerol dialkyl glycerol tetraether that has isoprenoid chains and that is of archaeal origin.
alternative label: isoprenoid GDGT
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: glycerol dialkyl glycerol tetraether
related: loess and paleosol
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

methylation index of branched tetraethers
type: Concept
definition: an organic compound index that is calculated as the ratio of various branched tetraethers and that reflects temperature and/or soil pH.
alternative label: MBT index
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: organic compound index
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

resampled
type: Concept
definition: a data transformation that involves changing the frequency of time series observations.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: detail
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

fourier transform infrared spectroscopy
type: Concept
definition: vibrational spectroscopy in which the sample absorbs a single pulse of radiation from the infrared region (0.78 to 1000 micrometers) and the spectrum obtained is subject to a Fourier transform (Credit: Chemical Methods Ontology).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: vibrational spectroscopy
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

gamma ray attenuation porosity evaluation
type: Concept
definition: gamma ray densitometry that measures gamma ray attenuation through unsplit cores and provides an estimate for bulk density, water content, and porosity (Credit: Last and Smol, Tracking Environmental Change Using Lake Sediments).
alternative label: GRAPE
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: gamma ray densitometry
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

magnetic susceptibility measurement
type: Concept
definition: a laboratory method the degree to which a material can be magnetized in an external magnetic field.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: laboratory method
narrower: magnetic susceptibility measurement with point or surface sensor
narrower: magnetic susceptibility measurement with ring or loop sensor
narrower: magnetic susceptibility measurement with single sample sensor
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

magnetic susceptibility measurement with ring or loop sensor
type: Concept
definition: a magnetic susceptibility measurement made on whole (unsplit) sediment and rock cores.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: magnetic susceptibility measurement
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

magnetic susceptibility measurement with point or surface sensor
type: Concept
definition: a magnetic susceptibility measurement that is made for surface scanning and for providing high-resolution surface measurements on split sediment or slabbed rock cores (Credit: Geotek).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: magnetic susceptibility measurement
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

magnetic susceptibility measurement with single sample sensor
type: Concept
definition: a magnetic susceptibility measurement made on single samples, removed from the sediment core.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: magnetic susceptibility measurement
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

rock eval pyrolysis
type: Concept
definition: pyrolysis that uses a programmed temperature heating in an inert atmosphere (helium) of a small sample (~100 mg) to quantitatively and selectively determine (1) the free hydrocarbons contained in the sample and (2) the hydrocarbon- and oxygen-containing compounds (CO2) that are volatilized during the cracking of the unextractable organic matter in the sample (kerogen) (Credit: Ocean Drilling Program).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: pyrolysis
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

x-ray particle size analysis
type: Concept
definition: particle size analysis using an x-ray.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: particle size analysis
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

calendar kiloyear before present
type: Concept
definition: an age unit of 10^[3] years, calibrated to actual years if derived from radiocarbon dating, before present with present defined as 1950 Common Era. Times after 1950 CE are expressed as negative values.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: age unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

ampere per meter
type: Concept
definition: a magnetic field strength unit that is the strength of the field that is produced at the center of a single circular conductor with a one meter diameter carrying a steady current of 1 ampere.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: magnetic field strength unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

ampere square meter per kilogram
type: Concept
definition: a magnetic moment unit that is the magnetic moment, in ampere square meter, per unit mass, in kilograms.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: magnetic moment unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

volume unit
type: Concept
definition: a unit which is a standard measure of the amount of space occupied by any substance, whether solid, liquid, or gas (Credit: Units of measurement ontology).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: unit
narrower: acre foot
narrower: cubic centimeter
narrower: cubic kilometer
narrower: cubic meter
narrower: cubic micrometer
narrower: cubic millimeter
narrower: liter
narrower: megaliter
narrower: milliliter
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

cubic centimeter
type: Concept
definition: a volume unit which is equal to one millionth of a cubic meter or 10^[-6] m^[3], or to 1 ml (Credit: Units of measurement ontology).
alternative label: cc
alternative label: cm3
alternative label: cubic centimetre
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: volume unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

centimeter per year
type: Concept
definition: a length per time unit that is one hundredth of a meter, or 10^[-2] m, per one year.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: length per time unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

count per square centimeter per year
type: Concept
definition: a count per area per time unit that is a simple count of a substance per one ten-thousandth of a square meter, or 10^[-4] m2, and per one year.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: count per area per time unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

count per gram per year
type: Concept
definition: a count per mass per time unit that is a simple count of a substance per one thousandth of a kilogram, or 10^[-3] kg, of sample per year.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: count per mass per time unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

count per year
type: Concept
definition: a count per time unit that is a simple count of the occurrence of a substance per one year.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: count per time unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

count per second
type: Concept
definition: a count per time unit that is a simple count of the occurrence of a substance per one second.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: count per time unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

disintegration per minute per gram
type: Concept
definition: a specific activity unit which is equal to the activity of a gram of radioactive material in which one nucleus decays per minute or there is one atom disintegration per minute.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: specific activity unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

gram per square centimeter
type: Concept
definition: an area density unit which is equal to the mass of an object in grams, or 10^[-3] kilogram, per square centimeter, or 10^[-4] square meters.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: area density unit
created: 2018-03-26 00:00:00.0
modified: 2021-05-05 18:12:22.0

gram per square centimeter per kiloyear
type: Concept
definition: a mass per area per time unit that is one thousandth of a kilogram, or 10^[-3] kg, per one ten-thousandth of a square meter, or 10^[-4] m^[2], per one thousand years.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: mass per area per time unit
created: 2018-03-26 00:00:00.0
modified: 2020-08-24 12:29:41.0

gram per square centimeter per year
type: Concept
definition: a mass per area per time unit that is one thousandth of a kilogram, or 10^[-3] kg, per one ten-thousandth of a square meter, or 10^[-4] m^[2], per one year.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: mass per area per time unit
created: 2018-03-26 00:00:00.0
modified: 2020-08-24 12:30:35.0

gram per cubic centimeter
type: Concept
definition: a mass density unit which is equal to mass of an object in grams divided by the volume in cubic centimeters (Credit: Units of measurement ontology).
alternative label: g/cc
alternative label: g/cm3
alternative label: gram per cubic centimetre
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: mass density unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

gram per kilogram
type: Concept
definition: a mass fraction unit that measures the number of grams, or 10^[-3] kilogram, of one subcomponent of a sample relative to one kilogram of either another subcomponent or of the entire sample.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: mass fraction unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

gram per square meter per year
type: Concept
definition: a mass per area per time unit that is one thousandth of a kilogram, or 10^[-3] kg, per one square meter, per one year.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: mass per area per time unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

gram per cubic meter
type: Concept
definition: a mass density unit which is equal to mass of an object in grams divided by the volume in cubic meters.
alternative label: g/m3
alternative label: gram per cubic metre
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: mass density unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

kiloampere per meter
type: Concept
definition: a magnetic field strength unit that is one thousand amperes, or 10^[3] A, per meter.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: magnetic field strength unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

cubic meter per kilogram
type: Concept
definition: a specific volume unit which is equal to one cubic meter volume occupied by one kilogram of a particular substance (Credit: Units of measurement ontology).
alternative label: cubic metre per kilogram
alternative label: m3/kg
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: specific volume unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

milligram per square centimeter per year
type: Concept
definition: a mass per area per time unit that is one thousandth of a gram, or 10^[-3] g, per one ten-thousandth of a square meter, or 10^[-4] m^[2], per one year.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: mass per area per time unit
created: 2018-03-26 00:00:00.0
modified: 2020-08-24 12:29:52.0

milligram per gram
type: Concept
definition: a mass fraction unit that measures the number of milligrams, or 10^[-3] g, of one subcomponent of a sample relative to one gram of either another subcomponent or of the entire sample.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: mass fraction unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

microgram per gram
type: Concept
definition: a mass fraction unit that measures the number of micrograms, or 10^[-6] grams, of one subcomponent of a sample relative to one gram of either another subcomponent or of the entire sample.
alternative label: mcg/g
alternative label: ug/g
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: mass fraction unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

millimole per mole
type: Concept
definition: a mole fraction unit that measures the number of millimoles, or 10^[-3] mole, of one subcomponent of a sample relative to one mole of either another subcomponent or of the entire sample.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: mole fraction unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

millisiemens per centimeter
type: Concept
definition: an electrical conductivity unit that is one thousandth of a siemen, or 10^[-3] S, per one hundredeth of a meter, or 10^[-2] m.
alternative label: mS/cm
alternative label: millimho per centimeter
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: electrical conductivity unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

microsiemens per centimeter
type: Concept
definition: an electrical conductivity unit that is one millionth of a siemen, or 10^[-6] S, per one hundredeth of a meter, or 10^[-2] m.
alternative label: micromho per centimeter
alternative label: uS/cm
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: electrical conductivity unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

area unit
type: Concept
definition: a unit which is a standard measure of the amount of a 2-dimensional flat surface (Credit: Units of measurement ontology).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: unit
narrower: peak area integral
narrower: square angstrom per quanta
narrower: square kilometer
narrower: square meter
narrower: square micrometer
narrower: square millimeter
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

square micrometer
type: Concept
definition: an area unit which is equal to one trillionth of a square meter or 10^[-12] m^[2].
alternative label: square micrometre
alternative label: um2
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: area unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

milliliter
type: Concept
definition: a volume unit which is equal to one thousandth of a liter or 10^[-3] L, or to 1 cubic centimeter (Credit: Units of measurement ontology).
alternative label: millilitre
alternative label: ml
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: volume unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

mole percent
type: Concept
definition: a percent unit that denotes the moles of a substance in a mixture as a percentage of the moles of the entire mixture.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: percent
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

peak area integral
type: Concept
definition: an area unit that is calculated as the area under the curve of a measured spectrum and that generally gives relative information about the abundance of various sample sub-components.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: area unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

volume percent
type: Concept
definition: a percent unit that denotes the volume of the solute in mL per 100 mL of the resulting solution (Credit: Units of measurement ontology).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: percent
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

per mil seawater
type: Concept
definition: a per mil unit calculated using the isotopic concentration of standard seawater.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: per mil
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

radiocarbon kiloyear before present
type: Concept
definition: an age unit of 10^[3] years, derived from radiocarbon dating without calibration to actual years, before present with present defined as 1950 Common Era. Times after 1950 CE are expressed as negative values.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: age unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

carbonate
type: Concept
definition: an identified mineral characterized by a fundamental anionic structure of CO3(2-) (Credit: Dictionary of Geological Terms).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: identified mineral
narrower: calcium carbonate
narrower: dolomite
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

bivalve
type: Concept
definition: an identifiable organism including clams and mussels that belongs to the kingdom Animalia, phylum Mollusca, class Bivalvia.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: organism
narrower: Panopea generosa
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

foraminifer
type: Concept
definition: an identifiable organism that belongs to the kingdom Protozoa, order Foraminiferida.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: organism
narrower: benthic foraminifer
narrower: planktic foraminifer
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

cladoceran
type: Concept
definition: an identifiable organism commonly known as a water flea that belongs to the kingdom Animalia, phylum Arthropoda, class Branchiopoda, order Cladocera.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: organism
narrower: ephippia
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

ephippia
type: Concept
definition: the eggs of a cladoceran.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: cladoceran
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

anhysteretic remanent magnetization/isothermal remanent magnetization
type: Concept
definition: a magnetic ratio of the anhysteretic remanent magnetization to the isothermal remanent magnetization, which can yield a qualitative measure of magnetic grain size (higher values indicating finer grain sizes).
alternative label: ARM/IRM
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: magnetic ratios
related: loess and paleosol
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

anhysteretic remanent magnetization/saturation isothermal remanent magnetization
type: Concept
definition: a magnetic ratio of the anhysteretic remanent magnetization to the saturation isothermal remanent magnetization, which can yield a qualitative measure of magnetic grain size.
alternative label: ARM/SIRM
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: magnetic ratios
related: loess and paleosol
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

coercivity of remanence/coercivity
type: Concept
definition: a magnetic ratio of the coercivity of remanence to the coercivity, which can yield a qualitative measure of magnetic grain size.
alternative label: HCR/HC
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: magnetic ratios
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

magnetic susceptibility
type: Concept
definition: a magnetic moment that is the degree to which a material can be magnetized in an external magnetic field.
alternative label: K
alternative label: MS
alternative label: chi
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: magnetic moments
narrower: mass magnetic susceptibility
narrower: volume magnetic susceptibility
related: fire history
related: loess and paleosol
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

natural remanent magnetization/anhysteretic remanent magnetization
type: Concept
definition: a magnetic ratio of the natural remanent magnetization to the anhysteretic remanent magnetization, which can yield a qualitative measure of paleointensity of the geomagnetic field.
alternative label: NRM/ARM
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: magnetic ratios
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

saturation isothermal remanent magnetization/saturation isothermal magnetization
type: Concept
definition: a magnetic ratio of the saturation isothermal remanent magnetization to the saturation isothermal magnetization.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: magnetic ratios
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

saturation isothermal remanent magnetization/initial magnetization slope
type: Concept
definition: a magnetic ratio of the saturation isothermal remanent magnetization to the initial magnetization slope.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: magnetic ratios
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

total ostracods
type: Concept
definition: the count of total ostracod valves in a sample.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: ostracod index
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

total benthic diatoms
type: Concept
definition: the total count or percentage of diatoms in an assemblage who live free on or in sediments (motile) or attached to substrata (sessile).
alternative label: epontic diatoms
alternative label: periphytic diatoms
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: diatom habitat-based index
narrower: total epilithic diatoms
narrower: total epipelic diatoms
narrower: total epiphytic diatoms
narrower: total epipsammic diatoms
narrower: total epizoic diatoms
narrower: total tychoplanktic diatoms
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

total planktic diatoms
type: Concept
definition: the total count or percentage of diatoms in an assemblage whose habitat is floating in the water column.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: diatom habitat-based index
narrower: total pelagic diatoms
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

planktic:benthic diatom
type: Concept
definition: the ratio of planktic to benthic diatoms in a sample.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: diatom ratio
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

total tychoplanktic diatoms
type: Concept
definition: the total count or percentage of benthic diatoms in an assemblage that can often be found resuspended in the water column.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: total benthic diatoms
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

total centric diatoms
type: Concept
definition: the total count or percentage of diatoms in an assemblage that are radially symmetric.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: diatom morphology-based index
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

total saline diatoms
type: Concept
definition: the total count or percentage of diatoms in an assemblage tolerant of saline conditions.
alternative label: hypersaline diatoms
alternative label: hyposaline diatoms
alternative label: mesosaline diatoms
alternative label: subsaline diatoms
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: diatom tolerance-based index
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

total shallow water diatoms
type: Concept
definition: the total count or percentage of diatoms in an assemblage living in shallow water environments characterized by, eg, high turbulence and high light levels.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: diatom tolerance-based index
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

total pennate diatoms
type: Concept
definition: the total count or percentage of diatoms in an assemblage that are bilaterally, not radially, symmetric.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: diatom morphology-based index
narrower: total araphid diatoms
narrower: total raphid diatoms
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

carbon preference index
type: Concept
definition: an organic compound index that is based on n-alkanes to quantify preservation/degradation patterns in sediments and/or source material of organic matter.
alternative label: CPI
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: organic compound index
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

C4 plants
type: Concept
definition: an ecosystem quantity that measures the presence of plants using the Hatch-Slack photosynthetic pathway.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: ecosystem quantity
related: climate reconstructions
related: instrumental
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

humification index
type: Concept
definition: a measure of the extent to which a peat sample has undergone decomposition and humic acids have been produced.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: peat
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

hydrogen index
type: Concept
definition: an organic compound index that measures the amount of hydrogen relative to the amount of organic carbon present in a sample.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: organic compound index
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

oxygen index
type: Concept
definition: an organic compound index that measures the amount of oxygen relative to the amount of organic carbon present in a sample.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: organic compound index
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

lake level
type: Concept
definition: a geographic variable that quantifies the height of the lake water surface relative to some datum.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: geographic variable
related: instrumental
related: lake levels
related: paleoclimatic modeling
related: paleolimnology
related: tree ring
created: 2018-03-26 00:00:00.0
modified: 2020-08-14 16:22:21.0

pyrolysis
type: Concept
definition: a laboratory method that involves the chemical degradation of a sample by thermal energy in an inert environment (Credit: Chemical Methods Ontology).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: laboratory method
narrower: loss on ignition
narrower: rock eval pyrolysis
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

beta-particle detection
type: Concept
definition: spectroscopy in which the beta-particles spontaneously emitted from radioisotopes are detected (Credit: Chemical Methods Ontology).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: spectroscopy
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

trophic position index
type: Concept
definition: an ecosystem index that uses amino-acid-specific stable nitrogen isotopic compositions to measure trophic structure within an ecosystem.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: ecosystem index
related: corals and sclerosponges
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

collection date
type: Concept
definition: sampling metadata that identifies the date that the physical sample was collected.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: sampling metadata
related: borehole
related: climate forcing
related: corals and sclerosponges
related: fire history
related: historical
related: ice cores
related: instrumental
related: loess and paleosol
related: paleoceanography
related: paleolimnology
related: speleothems
related: tree ring
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

Desmophyllum sp.
type: Concept
definition: any coral that belongs to the genus Desmophyllum.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: coral
narrower: Desmophyllum dianthus
related: corals and sclerosponges
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

Desmophyllum dianthus
type: Concept
definition: a particular species of the genus Desmophyllum that is commonly known as cockscomb cup coral.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: Desmophyllum sp.
related: corals and sclerosponges
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

Porites evermanni
type: Concept
definition: a particular species of the genus Porites that is commonly known as the hump coral.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: Porites sp.
related: corals and sclerosponges
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

range
type: Concept
definition: an error estimate that is the difference between the highest and lowest possible values.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: error
narrower: range lower bound
narrower: range upper bound
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

green intensity
type: Concept
definition: a component of the RGB color system that measures the level of green light required to produce the color of a substance.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: RGB color system
related: ice cores
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

lightness
type: Concept
definition: an axis of the CIE L*a*b* color system, with the darkest black at 0 and the brightest white at 100.
alternative label: L*
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: CIE L*a*b* color system
related: loess and paleosol
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

unspecified margin of error
type: Concept
definition: the value, that when added to and subtracted from the mean estimate, creates a interval that is believed to capture the true value according to an unspecified calculation.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: unspecified error
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

unspecified error upper bound
type: Concept
definition: the upper (maximum) bound of the interval believed to capture the true value according to an unspecified calculation.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: unspecified error
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

unspecified error lower bound
type: Concept
definition: the lower (minimum) bound of the interval believed to capture the true value according to an unspecified calculation.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: unspecified error
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

delta 17O excess
type: Concept
definition: a measure of the deviation of a delta 17O value from the value calculated from delta 18O on the same sample assuming mass-independent fractionation, that is delta 17O - 0.52 delta 18O.
alternative label: Delta 17O
alternative label: d17O excess
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: delta 17O
related: ice cores
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

diffraction and scattering method
type: Concept
definition: a laboratory method that measures the change in direction or intensity of electromagnetic radiation applied to a sample.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: laboratory method
narrower: laser light scattering
narrower: x-ray diffraction
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

laser light scattering
type: Concept
definition: a scattering method for determining structure by measuring the change in direction or energy of scattered visible light. Light (from a laser source) is scattered by the electrons surrounding the atomic nuclei in the sample (Credit: Chemical Methods Ontology).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: diffraction and scattering method
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

gas chromatography - thermal conductivity detection
type: Concept
definition: gas chromatography that uses a device that measures the change in thermal conductivity caused by a sample (Credit: Chemical Methods Ontology).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: gas chromatography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

ice age
type: Concept
definition: the age, either directly measured or inferred, of ice at the midpoint of a sample within an ice core.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: age
related: ice cores
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

gas age
type: Concept
definition: the age, either directly measured or inferred, of trapped gas at the midpoint of a sample within an ice core.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: age
related: ice cores
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

ice age at sample start
type: Concept
definition: the age, either directly measured or inferred, of ice at the oldest end of a sample within an ice core.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: age
related: ice cores
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

ice age at sample end
type: Concept
definition: the age, either directly measured or inferred, of ice at the youngest end of a sample within an ice core.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: age
related: ice cores
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

gas age at sample start
type: Concept
definition: the age, either directly measured or inferred, of trapped gas at the oldest end of a sample within an ice core.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: age
related: ice cores
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

gas age at sample end
type: Concept
definition: the age, either directly measured or inferred, of trapped gas at the youngest end of a sample within an ice core.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: age
related: ice cores
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

sublimation
type: Concept
definition: a gas extraction method that liberates gas through the evaporation and recondensation of ice.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: gas extraction method
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

inductively-coupled plasma sector field mass spectrometry
type: Concept
definition: inductively-coupled plasma mass spectrometry in which the sample is ionized in a plasma (a partially ionized gas such as Ar containing free electrons) which has been generated by electromagnetic induction. The beam of ions is then directed into magnetic field, the orientation of which is perpendicular to the beam. The magnetic field forces the charged particles into different circular trajectories, the radii of which depend on the strength of the magnetic field, the accelerating voltage, and the mass of the ion (Credit: Chemical Methods Ontology).
alternative label: ICP-SF-MS
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: inductively-coupled plasma mass spectrometry
created: 2018-03-26 00:00:00.0
modified: 2020-07-10 10:49:50.0

barometric method
type: Concept
definition: a laboratory method of calculating air content of ice by measuring the pressure and temperature of air of a known volume.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: laboratory method
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

grain size mean
type: Concept
definition: the average grain size in a sample.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: grain size parameter
narrower: sortable silt mean grain size
related: loess and paleosol
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

event layer
type: Concept
definition: a formation property that describes or quantifies layers within a sample that formed due to unusual environmental or climatic events.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: formation property
narrower: frost ring
narrower: light ring
narrower: tree demographic and fire event code
narrower: tree demographic and injury and fire event code
related: paleoceanography
related: paleolimnology
related: speleothems
related: tree ring
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

sulfide mineral
type: Concept
definition: an identified mineral characterized by the linkage of sulfur with a metal.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: identified mineral
narrower: chalcocite
narrower: covellite
narrower: geocronite
narrower: proustite
narrower: pyrite
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

n-alkane
type: Concept
definition: an alkane that has a linear, or straight chain, structure.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: alkane
narrower: C10 n-alkane
narrower: C11 n-alkane
narrower: C12 n-alkane
narrower: C13 n-alkane
narrower: C14 n-alkane
narrower: C15 n-alkane
narrower: C16 n-alkane
narrower: C17 n-alkane
narrower: C18 n-alkane
narrower: C19 n-alkane
narrower: C20 n-alkane
narrower: C21 n-alkane
narrower: C22 n-alkane
narrower: C23 n-alkane
narrower: C24 n-alkane
narrower: C25 n-alkane
narrower: C26 n-alkane
narrower: C27 n-alkane
narrower: C28 n-alkane
narrower: C29 n-alkane
narrower: C30 n-alkane
narrower: C31 n-alkane
narrower: C32 n-alkane
narrower: C33 n-alkane
narrower: C34 n-alkane
narrower: C35 n-alkane
narrower: C36 n-alkane
narrower: C37 n-alkane
narrower: C38 n-alkane
narrower: C39 n-alkane
narrower: C40 n-alkane
narrower: methane
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

C21 n-alkane
type: Concept
definition: a n-alkane with the chemical formula C21H44.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: n-alkane
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

C22 n-alkane
type: Concept
definition: a n-alkane with the chemical formula C22H46.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: n-alkane
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

C23 n-alkane
type: Concept
definition: a n-alkane with the chemical formula C23H48.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: n-alkane
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

C24 n-alkane
type: Concept
definition: a n-alkane with the chemical formula C24H50.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: n-alkane
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

C25 n-alkane
type: Concept
definition: a n-alkane with the chemical formula C25H52.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: n-alkane
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

C26 n-alkane
type: Concept
definition: a n-alkane with the chemical formula C26H54.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: n-alkane
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

C27 n-alkane
type: Concept
definition: a n-alkane with the chemical formula C27H56.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: n-alkane
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

C28 n-alkane
type: Concept
definition: a n-alkane with the chemical formula C28H58.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: n-alkane
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

C29 n-alkane
type: Concept
definition: a n-alkane with the chemical formula C29H60.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: n-alkane
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

C30 n-alkane
type: Concept
definition: a n-alkane with the chemical formula C30H62.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: n-alkane
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

C31 n-alkane
type: Concept
definition: a n-alkane with the chemical formula C31H64.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: n-alkane
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

C33 n-alkane
type: Concept
definition: a n-alkane with the chemical formula C33H68.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: n-alkane
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

wavelength-dispersive x-ray fluorescence spectroscopy
type: Concept
definition: x-ray fluorescence spectroscopy in which the energy spectrum of the X-rays emitted due to core-to-core transitions is measured using a diffraction grating or crystal (Credit: Chemical Methods Ontology).
alternative label: WD-XRF
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: x-ray fluorescence spectroscopy
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

lake surface temperature
type: Concept
definition: the mean temperature of a lake surface.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: lake water temperature
related: climate reconstructions
related: historical
related: insect
related: instrumental
related: paleoclimatic modeling
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

circulation index
type: Concept
definition: a circulation variable that describes or quantifies a climate pattern with identifiable characteristics, specific regional effects, and often oscillatory behavior (Credit: Wikipedia).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: circulation variable
narrower: Arctic Oscillation Index
narrower: Atlantic Multidecadal Oscillation Index
narrower: Atlantic Multidecadal Variability Index
narrower: California Current Index
narrower: Dipole Mode Index
narrower: El Niño Southern Oscillation Index
narrower: Hadley circulation index
narrower: Interdecadal Pacific Oscillation Index
narrower: Intertropical Convergence Zone index
narrower: North Atlantic Oscillation Index
narrower: Northern Oscillation Index
narrower: Pacific Decadal Oscillation Index
narrower: Pacific-North American Pattern
narrower: South Asian Summer Monsoon Index
narrower: South Pacific Convergence Zone Index
narrower: Southern Annular Mode
narrower: Upwelling Index
narrower: jet stream position
narrower: storm variable
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

hydroclimatic variable
type: Concept
definition: an earth system variable that relates to the parts of climate influenced by water.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: earth system variable
narrower: hydroclimate index
narrower: hydroclimate quantity
narrower: hydroclimate rate
narrower: hydroclimate ratio
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

ecosystem variable
type: Concept
definition: an earth system variable that measures or describes quantities, properties, and processes within a community of living organisms and the nonliving components of their environment.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: earth system variable
narrower: ecosystem index
narrower: ecosystem phenomenon
narrower: ecosystem process
narrower: ecosystem quantity
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

high-performance liquid chromatography
type: Concept
definition: column chromatography where the mobile phase is a liquid, the stationary phase consists of very small particles and the inlet pressure is relatively high (Credit: Chemical Methods Ontology).
alternative label: HPLC
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: liquid chromatography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

n-alkanoic acid
type: Concept
definition: a saturated fatty acid with the general formula CnH(2n+1)COOH.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: saturated fatty acid
narrower: C16 n-alkanoic acid
narrower: C17 n-alkanoic acid
narrower: C18 n-alkanoic acid
narrower: C19 n-alkanoic acid
narrower: C20 n-alkanoic acid
narrower: C21 n-alkanoic acid
narrower: C22 n-alkanoic acid
narrower: C23 n-alkanoic acid
narrower: C24 n-alkanoic acid
narrower: C25 n-alkanoic acid
narrower: C26 n-alkanoic acid
narrower: C27 n-alkanoic acid
narrower: C28 n-alkanoic acid
narrower: C29 n-alkanoic acid
narrower: C30 n-alkanoic acid
narrower: C31 n-alkanoic acid
narrower: C32 n-alkanoic acid
narrower: C33 n-alkanoic acid
narrower: C34 n-alkanoic acid
narrower: formic acid
related: loess and paleosol
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

C22 n-alkanoic acid
type: Concept
definition: a n-alkanoic acid with the formula C21H43COOH.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: n-alkanoic acid
related: loess and paleosol
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

C24 n-alkanoic acid
type: Concept
definition: a n-alkanoic acid with the formula C23H47COOH.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: n-alkanoic acid
related: loess and paleosol
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

C26 n-alkanoic acid
type: Concept
definition: a n-alkanoic acid with the formula C25H51COOH.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: n-alkanoic acid
related: loess and paleosol
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

C28 n-alkanoic acid
type: Concept
definition: a n-alkanoic acid with the formula C27H55COOH.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: n-alkanoic acid
related: loess and paleosol
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

C30 n-alkanoic acid
type: Concept
definition: a n-alkanoic acid with the formula C29H59COOH.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: n-alkanoic acid
related: loess and paleosol
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

C32 n-alkanoic acid
type: Concept
definition: a n-alkanoic acid with the formula C31H63COOH.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: n-alkanoic acid
related: loess and paleosol
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

highly-branched isoprenoid alkene
type: Concept
definition: an alkene that is highly-branched and composed of a number of isoprene (C5H8) units and that is produced by a relatively small number of marine and freshwater diatoms belonging to the Haslea, Navicula, Pleurosigma, and Rhizosolenia genera (Credit: Belt et al. 2013, 10.1016/j.quascirev.2012.12.001).
alternative label: HBI
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: alkene
narrower: ice proxy with 25 carbon atoms
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

terrestrial to aquatic ratio
type: Concept
definition: an organic compound index of n-alkanes that is defined as (C27+C29+C31)/(C17+C19+C21) by Bourbonniere and Meyers 1997 to reflect the ratio of higher-order terrestrial plant material to aquatic plant material derived from algae, photosynthetic bacteria, and submerged and emergent aquatics.
alternative label: TAR
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: organic compound index
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

lake levels
type: Concept
definition: a data type that quantifies past changes in lake elevation or lake depth, either directly or using reconstruction methods, based on shoreline deposits or sediment cores.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: data type
related: lake level
related: precipitation minus evaporation
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

actual/potential evapotranspiration
type: Concept
definition: the hydroclimate ratio of the measured evapotranspiration to the amount of evaporation that would occur if a sufficient water source were available.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: hydroclimate ratio
related: climate reconstructions
related: instrumental
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

El Niño event
type: Concept
definition: an index of the El Niño Southern Oscillation that quantifies the occurrence of anomalously warm sea surface temperatures in the eastern tropical Pacific.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: El Niño Southern Oscillation Index
related: climate reconstructions
related: historical
related: instrumental
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

cryospheric quantity
type: Concept
definition: a cryospheric variable that quantifies some aspect of the components of the cryosphere.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: cryospheric variable
narrower: bedrock elevation
narrower: equilibrium line altitude
narrower: ice break-up date
narrower: ice sheet area
narrower: ice sheet elevation
narrower: ice sheet thickness
narrower: ice sheet volume
narrower: sea ice cover
narrower: sea ice thickness
narrower: sea ice volume
narrower: snow cover
narrower: snow depth
narrower: snow volume
narrower: snow water equivalent
related: climate reconstructions
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

equilibrium line altitude
type: Concept
definition: a cryospheric quantity that is the elevation at which the mass balance of an ice sheet or glacier is zero over the year, that is where ablation equals accumulation.
alternative label: ELA
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: cryospheric quantity
related: climate reconstructions
related: instrumental
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

intrinsic water use efficiency
type: Concept
definition: an ecosystem index that quantifies the ratio of the rate of carbon assimilaton (photosynthesis) to the rate of transpiration in plants.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: ecosystem index
related: climate reconstructions
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

surface temperature
type: Concept
definition: the mean temperature at the earth surface.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: temperature
related: climate reconstructions
related: historical
related: instrumental
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

land surface temperature
type: Concept
definition: the mean temperature of the land surface.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: land temperature
related: climate reconstructions
related: historical
related: instrumental
related: paleoclimatic modeling
related: tree ring
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

surface air temperature
type: Concept
definition: the mean temperature of air generally 1.25 to 2 meters above the earth surface.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: air temperature
related: climate reconstructions
related: historical
related: ice cores
related: insect
related: instrumental
related: paleoceanography
related: paleoclimatic modeling
related: paleolimnology
related: speleothems
related: tree ring
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

precipitation minus evaporation
type: Concept
definition: the hydroclimate rate that is the difference in rate between precipitation and evaporation at the earth's surface.
alternative label: P-E
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: hydroclimate rate
related: climate reconstructions
related: instrumental
related: lake levels
related: paleoclimatic modeling
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

relative humidity
type: Concept
definition: the hydroclimate ratio of water vapor present in air to the amount of water needed to achieve saturation at the local temperature.
alternative label: RH
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: hydroclimate ratio
related: climate reconstructions
related: instrumental
related: paleoclimatic modeling
related: tree ring
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

relative sea level
type: Concept
definition: sea level that is the result of the rising or falling of land relative to the ocean surface.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: sea level
related: climate reconstructions
related: corals and sclerosponges
related: paleoceanography
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

sea ice cover
type: Concept
definition: a cryospheric quantity that is a measure of the extent to which the ocean surface is covered by sea ice.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: cryospheric quantity
related: climate reconstructions
related: instrumental
related: paleoceanography
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

insoluble acetic acid
type: Concept
definition: acetic acid that is insoluble.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: acetic acid
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

soluble acetic acid
type: Concept
definition: acetic acid that is soluble.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: acetic acid
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

C25 n-alkane
type: Concept
definition: a n-alkane with the chemical formula C25H52.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: n-alkane
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

C32 n-alkanoic acid
type: Concept
definition: a n-alkanoic acid with the formula C31H63COOH.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: n-alkanoic acid
related: loess and paleosol
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

C34 n-alkanoic acid
type: Concept
definition: a n-alkanoic acid with the formula C33H67COOH.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: n-alkanoic acid
related: loess and paleosol
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

C27 n-alkanoic acid
type: Concept
definition: a n-alkanoic acid with the formula C26H53COOH.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: n-alkanoic acid
related: loess and paleosol
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

n-alkanol
type: Concept
definition: an alcohol with the general formula CnH(2n+2)O.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: alcohol
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

particles
type: Concept
definition: a bulk geological material that consists of a small quantity of a substance that is measurable in its size or composition.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: bulk geological material
related: ice cores
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

particles
type: Concept
definition: a bulk geological material that consists of a small quantity of a substance that is measurable in its size or composition.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: bulk geological material
related: ice cores
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

percentile
type: Concept
definition: the value below which a given percentage of observations in a group of observations fall.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: error
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

validation coefficient of efficiency
type: Concept
definition: A coefficient of determination that quantifies whether a statistical or physically-based model is a better predictor of validation period values than the mean climatology of the validation period and that is calculated as: 1 - (sum((observed-predicted)^2)/n)/(sum((observed-validation climatology)^2)/n).
alternative label: validation CE
alternative label: verification CE
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: coefficient of determination
created: 2018-03-26 00:00:00.0
modified: 2020-06-18 10:37:36.0

validation reduction of error
type: Concept
definition: a coefficient of determination that quantifies whether a statistical or physically-based model is a better predictor of validation period values than the mean climatology of the calibration period and that is calculated as: 1 - (sum((observed-predicted)^2)/n)/(sum((observed-calibration climatology)^2)/n).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: coefficient of determination
created: 2018-03-26 00:00:00.0
modified: 2020-06-18 10:36:55.0

calibration coefficient of determination
type: Concept
definition: a coefficient of determination that quantifies the percent of instrumental variable variance explained by a reconstruction of the the calibration period. It ranges from 0 (no calibrated variance) to 1.0 (perfect agreement between instrumental and reconstructed time series).
alternative label: calibration R-squared
alternative label: calibration R2
alternative label: calibration r2
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: coefficient of determination
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

validation coefficient of determination
type: Concept
definition: a coefficient of determination that quantifies the percent of instrumental variable variance explained by a reconstruction of the validation period (i.e., the period of the instrumental record not used for calibration). It ranges from 0 (no correlation) to 1.0 (perfect correlation).
alternative label: validation R squared
alternative label: validation R-squared
alternative label: validation R2
alternative label: validation r2
alternative label: verification R squared
alternative label: verification R-squared
alternative label: verification R2
alternative label: verification r2
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: coefficient of determination
created: 2018-03-26 00:00:00.0
modified: 2020-06-18 10:37:13.0

average correlation coefficient
type: Concept
definition: an extension of the correlation coefficent that measures the common variance between series in a tree ring chronology and that is calculated by taking the average of the correlations calculated between all series.
alternative label: RBAR
alternative label: r bar
alternative label: r-bar
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: correlation coefficient
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

expressed population signal
type: Concept
definition: an extension of the correlation coefficient that quantifies how well a chronology based on a finite number of samples represents the hypothetical perfect or true chronology and that is calculated as: (n*RBAR)/(n*RBAR + 1-RBAR) where n is the number of samples and RBAR is the mean intersample correlation coefficient.
alternative label: EPS
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: correlation coefficient
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

isotope dilution mass spectrometry
type: Concept
definition: isotope ratio mass spectrometry in which the relative abundance of isotopes in a sample is determined by using an isotope dilution standard (the sample labelled with a rare isotope) (Credit: Chemical Methods Ontology).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: isotope ratio mass spectrometry
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

watt per steradian
type: Concept
definition: a light unit which measures radiant intensity and which is equal to one kilogram meter squared per second cubed per steradian (Credit: Units of measurement ontology).
alternative label: W/sr
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: light unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

centimeter per kiloyear
type: Concept
definition: a length per time unit that is one hundredth of a meter, or 10^[-2] m, per one thousand years, or 10^[3] years.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: length per time unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

count per century
type: Concept
definition: a count per time unit that is a simple count of the occurrence of a substance per one hundred years.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: count per time unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

count per square centimeter per kiloyear
type: Concept
definition: a count per area per time unit that is a simple count of a substance per one ten-thousandth of a square meter, or 10^[-4] m2, and per thousand years, or 10^[3] years.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: count per area per time unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

epsilon unit
type: Concept
definition: a parts per notation unit that represents a one part per 10,000 deviation of a sample from the chondritic unifractionated reservoir (CHUR) standard (Credit: Wikipedia).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: parts per notation unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

gram per square meter per kiloyear
type: Concept
definition: a mass per area per time unit that is one thousandth of a kilogram, or 10^[-3] kg, per one square meter, per one thousand years.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: mass per area per time unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

meter per second
type: Concept
definition: a length per time unit that is one meter per one second.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: length per time unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

milligram per milligram
type: Concept
definition: a mass fraction unit that measures the number of milligrams, or 10^[-3] g, of one subcomponent of a sample relative to one milligram, or 10^[-3] g, of either another subcomponent or of the entire sample.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: mass fraction unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

milligram per cubic centimeter
type: Concept
definition: a mass density unit which is equal to mass of an object in milligrams, or 10^[-3] g, divided by the volume in cubic centimeters, or 10^[-6] cubic meters.
alternative label: mg/cc
alternative label: mg/cm3
alternative label: milligram per cubic centimetre
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: mass density unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

milligram per square centimeter per kiloyear
type: Concept
definition: a mass per area per time unit that is one thousandth of a gram, or 10^[-3] g, per one ten-thousandth of a square meter, or 10^[-4] m^[2], per one thousand years.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: mass per area per time unit
created: 2018-03-26 00:00:00.0
modified: 2020-08-24 12:29:27.0

milligram per kilogram
type: Concept
definition: a mass fraction unit that measures the number of milligrams, or 10^[-6] kg, of one subcomponent of a sample relative to one kilogram of either another subcomponent or of the entire sample.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: mass fraction unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

microgram per square centimeter per kiloyear
type: Concept
definition: a mass per area per time unit that is one millionth of a gram, or 10^[-6] g, per one ten-thousandth of a square meter, or 10^[-4] m^[2], per one thousand years.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: mass per area per time unit
created: 2018-03-26 00:00:00.0
modified: 2020-08-24 12:31:02.0

microgram per square meter per year
type: Concept
definition: a mass per area per time unit that is one millionth of a gram, or 10^[-6] g, per one square meter, per one year.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: mass per area per time unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

microgram per milligram
type: Concept
definition: a mass fraction unit that measures the number of micrograms, or 10^[-6] g, of one subcomponent of a sample relative to one milligram, or 10^[-3] g, of either another subcomponent or of the entire sample.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: mass fraction unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

millimole per gram
type: Concept
definition: a molality unit which expresses a concentration of a solution of one thousandth of a mole, or 10^[-3] mole, per one thousandth of a kilogram, or 10^[-3] kg, of solvent.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: molality unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

millimole per square centimeter per kiloyear
type: Concept
definition: a mole per area per time unit that is one thousandth of a mole, or 10^[-3] mole, per one ten-thousandth of a square meter, or 10^[-4] m, per one thousand years.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: mole per area per time unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

millivolt
type: Concept
definition: an electric potential difference unit which is equal to one thousandth of a volt or 10^[-3] V (Credit: Units of measurement ontology).
alternative label: mV
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: electric potential difference unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

nanogram per square centimeter per kiloyear
type: Concept
definition: a mass per area per time unit that is one billionth of a gram, or 10^[-9] g, per one ten-thousandth of a square meter, or 10^[-4] m^[2], per one thousand years.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: mass per area per time unit
created: 2018-03-26 00:00:00.0
modified: 2020-08-24 12:29:04.0

nanomole per gram
type: Concept
definition: a molality unit which expresses a concentration of a solution of one billionth of a mole, or 10^[-9] mole, per one thousandth of a kilogram, or 10^[-3] kg, of solvent.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: molality unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

ohm meter
type: Concept
definition: an electrical resistivity unit that is the resistivity of a material multiplied by the distance across which an electrical current is applied measured in meters.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: electrical resistivity unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

percent per nanometer
type: Concept
definition: a mathematical unit that is the first derivative of a spectrum, yielding the change in percent per change in nanometer.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: mathematical unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

micromole per square centimeter per kiloyear
type: Concept
definition: a mole per area per time unit that is one millionth of a mole, or 10^[-6] mole, per one ten-thousandth of a square meter, or 10^[-4] m, per one thousand years.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: mole per area per time unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

micromole per gram
type: Concept
definition: a molality unit which expresses a concentration of a solution of one millionth of a mole, or 10^[-6] mole, per one thousandth of a kilogram, or 10^[-3] kg, of solvent.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: molality unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

micromole per mole
type: Concept
definition: a mole fraction unit that measures the number of micromoles, or 10^[-6] mole, of one subcomponent of a sample relative to one mole of either another subcomponent or of the entire sample.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: mole fraction unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

aluminum/calcium
type: Concept
definition: the elemental ratio of aluminum to calcium.
alternative label: Al/Ca
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or compound ratio
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

barium/aluminum
type: Concept
definition: the elemental ratio of barium to aluminum.
alternative label: Ba/Al
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or compound ratio
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

barium/iron
type: Concept
definition: the elemental ratio of barium to iron.
alternative label: Ba/Fe
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or compound ratio
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

barium/titanium
type: Concept
definition: the elemental ratio of barium to titanium.
alternative label: Ba/Ti
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or compound ratio
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

bromine/silicon
type: Concept
definition: the elemental ratio of bromine to silicon.
alternative label: Br/Si
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or compound ratio
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

calcium/iron
type: Concept
definition: the elemental ratio of calcium to iron.
alternative label: Ca/Fe
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or compound ratio
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

germanium/silicon
type: Concept
definition: the elemental ratio of germanium to silicon.
alternative label: Ge/Si
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or compound ratio
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

iron/aluminum
type: Concept
definition: the elemental ratio of iron to aluminum.
alternative label: Fe/Al
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or compound ratio
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

magnesium/aluminum
type: Concept
definition: the elemental ratio of magnesium to aluminum.
alternative label: Mg/Al
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or compound ratio
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

manganese/aluminum
type: Concept
definition: the elemental ratio of manganese to aluminum.
alternative label: Mn/Al
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or compound ratio
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

molybdenum/aluminum
type: Concept
definition: the elemental ratio of molybdenum to aluminum.
alternative label: Mo/Al
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or compound ratio
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

osmium
type: Concept
definition: a chemical element with atomic number 76.
alternative label: Os
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or single-element molecule
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

phosphorus/aluminum
type: Concept
definition: the elemental ratio of phosphorus to aluminum.
alternative label: P/Al
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or compound ratio
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

potassium/aluminum
type: Concept
definition: the elemental ratio of potassium to aluminum.
alternative label: K/Al
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or compound ratio
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

rhenium
type: Concept
definition: a chemical element with atomic number 75.
alternative label: Re
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or single-element molecule
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

sodium/calcium
type: Concept
definition: the elemental ratio of sodium to calcium.
alternative label: Na/Ca
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or compound ratio
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

sulfur/organic carbon
type: Concept
definition: the elemental ratio of sulfur to organic carbon.
alternative label: S/organic C
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or compound ratio
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

titanium/calcium
type: Concept
definition: the elemental ratio of titanium to calcium.
alternative label: Ti/Ca
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or compound ratio
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

uranium/thorium
type: Concept
definition: the elemental ratio of uranium to thorium.
alternative label: U/Th
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or compound ratio
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

vanadium/aluminum
type: Concept
definition: the elemental ratio of vanadium to aluminum.
alternative label: V/Al
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or compound ratio
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

zinc/silicon
type: Concept
definition: the elemental ratio of zinc to silicon.
alternative label: Zn/Si
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or compound ratio
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

87Rb/86Sr
type: Concept
definition: the ratio of a radioactive isotope of rubidium with 50 neutrons and a stable isotope of strontium with 48 neutrons.
alternative label: rubidium-87/strontium-86
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: isotope ratio
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

147Sm/144Nd
type: Concept
definition: the ratio of a radioactive isotope of samarium with 85 neutrons and a radioactive isotope of neodymium with 84 neutrons.
alternative label: samarium-147/neodymium-144
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: isotope ratio
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

187Os/188Os
type: Concept
definition: the ratio of a stable isotope of osmium with 111 neutrons and a stable isotope of osmium with 112 neutrons.
alternative label: osmium-187/osmium-188
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: isotope ratio
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

187Re/188Os
type: Concept
definition: the ratio of a radioactive isotope of rhenium with 112 neutrons and a stable isotope of osmium with 112 neutrons.
alternative label: rhenium-187/osmium-188
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: isotope ratio
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

230Th
type: Concept
definition: the concentration of a radioactive isotope of thorium with 140 neutrons.
alternative label: thorium-230
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: single isotope concentration
narrower: 230Th excess
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

231Pa
type: Concept
definition: the concentration of a radioactive isotope of protactinium with 140 neutrons.
alternative label: protactinium-231
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: single isotope concentration
narrower: 231Pa excess
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

231Pa/230Th
type: Concept
definition: the ratio of a radioactive isotope of protactinium with 144 neutrons and a radioactive isotope of thorium with 141 neutrons.
alternative label: protactinium-231/thorium-230
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: isotope ratio
narrower: 231Pa/230Th excess
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

232Th
type: Concept
definition: the concentration of a radioactive isotope of thorium with 142 neutrons.
alternative label: thorium-232
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: single isotope concentration
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

234U
type: Concept
definition: the concentration of a radioactive isotope of uranium with 142 neutrons.
alternative label: uranium-234
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: single isotope concentration
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

238U
type: Concept
definition: the concentration of a radioactive isotope of uranium with 146 neutrons.
alternative label: uranium-238
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: single isotope concentration
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

238U/232Th
type: Concept
definition: the ratio of a radioactive isotope of uranium with 146 neutrons and a radioactive isotope of thorium with 142 neutrons.
alternative label: uranium-238/thorium-232
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: isotope ratio
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

albite
type: Concept
definition: a plagioclase feldspar mineral that has the general formula (Ca,Na)Al(Si,Al)Si2O8 with 90-100% Na and 0-10% Ca.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: plagioclase feldspar series
narrower: cleavelandite
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

amphibole
type: Concept
definition: a silicate mineral with the general formula A2B5(Si,Al,Ti)8O22(OH,F,Cl,O)2 where A is generally Mg, Fe, Ca, or Na and B is generally Mg, Fe(2+), Al, or Fe(3+).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: silicate mineral
narrower: kaersutite
narrower: leakeite
narrower: richterite
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

anorthite
type: Concept
definition: a plagioclase feldspar mineral that has the general formula (Ca,Na)Al(Si,Al)Si2O8 with 0-10% Na and 90-100% Ca.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: plagioclase feldspar series
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

anorthoclase
type: Concept
definition: an alkali feldspar mineral with the formula (Na,K)AlSi3O8.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: alkali feldspar series
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

biotite series
type: Concept
definition: a mica group mineral that belongs to the series between Annite-Phlogopite and Siderophyllite-Eastonite.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: mica group
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

muscovite
type: Concept
definition: a mica group mineral with the formula KAl2(AlSi3O10)(OH2).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: mica group
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

bytownite
type: Concept
definition: a plagioclase feldspar mineral that has the general formula (Ca,Na)Al(Si,Al)Si2O8 with 10-30% Na and 70-90% Ca.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: plagioclase feldspar series
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

cleavelandite
type: Concept
definition: albite with the formula NaAlSi3O8.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: albite
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

glauconite
type: Concept
definition: a mica group mineral with the formula (K,Na)(Mg,Fe2+,Fe3+)(Fe3+,Al)(Si,Al)4O10(OH)2.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: mica group
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

goethite
type: Concept
definition: a hydroxide mineral with the formula alpha-Fe3+O(OH).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: oxide and hydroxide minerals
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

halide mineral
type: Concept
definition: an identified mineral that is characterized by a halogen such as fluorine, chlorine, iodine, or bromine as the anion (Credit: Dictionary of Geological Terms).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: identified mineral
narrower: halite
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

halite
type: Concept
definition: a halide mineral with the formula NaCl.
alternative label: NaCl
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: halide mineral
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

hematite group
type: Concept
definition: an oxide mineral with the general formula X2O3, where X = Al, Fe, V, Cr, Ti.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: oxide and hydroxide minerals
narrower: karelianite
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

labradorite
type: Concept
definition: a plagioclase feldspar mineral that has the general formula (Ca,Na)Al(Si,Al)Si2O8 with 30-50% Na and 50-70% Ca.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: plagioclase feldspar series
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

maghemite
type: Concept
definition: an oxide mineral with the formula Fe3+2O3.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: oxide and hydroxide minerals
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

magnetite
type: Concept
definition: an oxide mineral with the formula: Fe(2+)Fe(3+)2O4.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: oxide and hydroxide minerals
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

microcline
type: Concept
definition: a potassium feldspar with the formula KAlSi3O8.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: potassium feldspar
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

oligoclase
type: Concept
definition: a plagioclase feldspar mineral that has the general formula (Ca,Na)Al(Si,Al)Si2O8 with 70-90% Na and 10-30% Ca.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: plagioclase feldspar series
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

orthoclase
type: Concept
definition: a potassium feldspar with the formula KAlSi3O8.
alternative label: adularia
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: potassium feldspar
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

pyrite
type: Concept
definition: a sulfide mineral with the formula FeS2.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: sulfide mineral
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

pyroxene
type: Concept
definition: a silicate mineral with the general formula ABSi2O6 where A is mainly Mg, Fe2+, Ca, or Na and B is mainly Mg, Fe2+, or Al.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: silicate mineral
narrower: clinoenstatite
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

saponite
type: Concept
definition: a smectite mineral with the formula Ca0.25(Mg,Fe)3((Si,Al)4O10)(OH)2·nH2O.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: smectite
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

serpentine
type: Concept
definition: a silicate mineral with the general formula D3[Si2O5](OH)4 where D is Mg, Fe, Ni, Mn, Al, Zn.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: silicate mineral
narrower: cronstedtite
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

siderite
type: Concept
definition: a carbonate with the formula FeCO3.
alternative label: FeCO3
alternative label: iron carbonate
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: carbonate
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

titanite
type: Concept
definition: a silicate mineral with the formula CaTiSiO5.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: silicate mineral
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

zircon
type: Concept
definition: a silicate mineral with the formula Zr(SiO4).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: silicate mineral
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

barium oxide
type: Concept
definition: an inorganic compound that has the chemical formula BaO.
alternative label: BaO
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: inorganic compound
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

calcium dioxide
type: Concept
definition: an inorganic compound that has the chemical formula CaO2.
alternative label: CaO2
alternative label: calcium peroxide
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: inorganic compound
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

phosphorus oxide
type: Concept
definition: an inorganic compound that is any one of a number of oxides of phosphorus, containing oxygen and phosphorus atoms.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: inorganic compound
narrower: phosphorus pentoxide
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

strontium oxide
type: Concept
definition: an inorganic compound that has the chemical formula SrO.
alternative label: SrO
alternative label: strontia
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: inorganic compound
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

titanium oxide
type: Concept
definition: an inorganic compound that is any of the oxides of titanium, containing oxygen and titanium atoms.
alternative label: TiO
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: inorganic compound
narrower: titanium dioxide
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

zirconium dioxide
type: Concept
definition: an inorganic compound that has the chemical formula ZrO2.
alternative label: ZiO2
alternative label: zirconia
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: inorganic compound
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

inorganic compound index
type: Concept
definition: a measurement of specific inorganic compounds, such as a ratio or count, that is derived from a series of observations and that is used as an indicator or measure of enviromental conditions.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: inorganic compound
related: instrumental
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

alkenone
type: Concept
definition: a ketone that is a long-chain unsaturated methyl and ethyl n-ketone produced by a few phytoplankton species of the class Prymnesiophyceae (Credit: Wikipedia).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: ketone
narrower: C37 alkenone
narrower: C38 alkenone
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

brassicasterol
type: Concept
definition: a sterol that has the chemical formula C28H46O and is synthesized by several unicellular algae (phytoplankton) and some terrestrial plants.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: sterol
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

fatty acid
type: Concept
definition: a carbonyl compound with the general formula CHO2R where R is a long aliphatic chain (i.e., lacking an especially stable ring of atoms).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: carbonyl compound
narrower: saturated fatty acid
narrower: unsaturated fatty acid
related: loess and paleosol
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2021-04-19 13:33:36.0

dinosterol ice proxy with 25 carbon atoms index
type: Concept
definition: an organic compound index that is calculated as the ratio of ice proxy with 25 carbon atoms (IP25) to dinosterol and that is a sea ice indicator.
alternative label: PDIP25
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: organic compound index
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

ice proxy with 25 carbon atoms
type: Concept
definition: a highly-branched isoprenoid alkene that contains 25 carbon atoms and that is produced selectively by sea ice diatoms (Credit: Belt et al. 2013, 10.1016/j.quascirev.2012.12.001).
alternative label: IP25
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: highly-branched isoprenoid alkene
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

lignin
type: Concept
definition: a class of cross-linked phenolic polymers found in vascular plants and some algae.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: phenol
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

anhysteretic remanent magnetization/magnetic susceptibility
type: Concept
definition: a magnetic ratio of the anhysteretic remanent magnetization to the magnetic susceptibility, which can yield a qualitative measure of magnetic grain size (higher values indicating finer grain sizes).
alternative label: ARM/K
alternative label: ARM/MS
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: magnetic ratios
related: loess and paleosol
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

characteristic remanent magnetization
type: Concept
definition: the natural remanent magnetization that a rock acquires during its formation.
alternative label: ChRM
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: natural remanent magnetization
narrower: characteristic remanent magnetization declination
narrower: characteristic remanent magnetization inclination
narrower: maximum angular deviation
narrower: paleointensity
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

natural remanent magnetization/isothermal remanent magnetization
type: Concept
definition: a magnetic ratio of the natural remanent magnetization to the isothermal remanent magnetization, which can yield a qualitative measure of paleointensity of the geomagnetic field.
alternative label: NRM/IRM
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: magnetic ratios
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

saturation magnetization
type: Concept
definition: a magnetic moment that is the maximum magnetization of a material within an applied magnetic field.
alternative label: Ms
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: magnetic moments
narrower: saturation isothermal magnetization
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

saturation remanent magnetization/saturation magnetization
type: Concept
definition: a magnetic ratio of the saturation remanent magnetization to the saturation magnetization, which can yield a qualitative measure of magnetic grain size.
alternative label: Mrs/Ms
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: magnetic ratios
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

foraminifer
type: Concept
definition: an identifiable organism that belongs to the kingdom Protozoa, order Foraminiferida.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: organism
narrower: foraminiferal index
narrower: identified foraminifer
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

identified foraminifer
type: Concept
definition: a foraminifer that has been identified taxonomically.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: foraminifer
narrower: Cibicidoides kullenbergi
narrower: Cibicidoides mundulus
narrower: Cibicidoides pachyderma
narrower: Cibicidoides wuellerstorfi
narrower: Globigerina bulloides
narrower: Globigerinella siphonifera
narrower: Globigerinoides ruber
narrower: Globorotalia crassaformis
narrower: Globorotalia hirsuta
narrower: Globorotalia inflata
narrower: Globorotalia menardii
narrower: Globorotalia truncatulinoides
narrower: Globorotalia tumida
narrower: Melonis affinis
narrower: Neogloboquadrina dutertrei
narrower: Neogloboquadrina incompta
narrower: Neogloboquadrina pachyderma
narrower: Nuttallides umbonifera
narrower: Orbulina universa
narrower: Oridorsalis umbonatus
narrower: Pulleniatina obliquiloculata
narrower: Trilobatus sacculifer
narrower: Uvigerina sp.
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

foraminiferal index
type: Concept
definition: a measurement of foraminifera, such as a ratio or count, that is derived from a series of observations and that is used as an indicator or measure.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: foraminifer
narrower: foraminifer fragmentation
narrower: planktic:benthic foraminifer
narrower: total agglutinated foraminifers
narrower: total benthic foraminifers
narrower: total calcareous foraminifers
narrower: total foraminifers
narrower: total planktic foraminifers
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

total agglutinated foraminifers
type: Concept
definition: the total count or percentage of foraminifers in an assemblage that have a test constructed from existing sedimentary grains as opposed to secreted by the organism.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: foraminiferal index
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

total benthic foraminifers
type: Concept
definition: the total count or percentage of foraminifers in an assemblage who live free on or in sediments or attached to substrata.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: foraminiferal index
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

total calcareous foraminifers
type: Concept
definition: the total count or percentage of foraminifers in an assemblage that secrete a rigid calcite or aragonite shell.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: foraminiferal index
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

Cibicidoides wuellerstorfi
type: Concept
definition: a particular species of the genus Cibicidoides.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: identified foraminifer
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

Globigerina bulloides
type: Concept
definition: a particular species of the genus Globigerina.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: identified foraminifer
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

Globigerinella siphonifera
type: Concept
definition: a particular species of the genus Globigerinella.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: identified foraminifer
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

Globigerinoides ruber
type: Concept
definition: a particular species of the genus Globigerinoides.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: identified foraminifer
narrower: Globigerinoides ruber pink
narrower: Globigerinoides ruber sensu lato
narrower: Globigerinoides ruber sensu stricto
narrower: Globigerinoides ruber white
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

Trilobatus sacculifer
type: Concept
definition: a particular species of the genus Trilobatus.
alternative label: Globigerinoides sacculifer
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: identified foraminifer
narrower: Trilobatus sacculifer with sac
narrower: Trilobatus sacculifer without sac
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

Globorotalia menardii
type: Concept
definition: a particular species of the genus Globorotalia.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: identified foraminifer
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

Globorotalia truncatulinoides
type: Concept
definition: a particular species of the genus Globorotalia.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: identified foraminifer
narrower: Globorotalia truncatulinoides encrusted
narrower: Globorotalia truncatulinoides non-encrusted
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

Neogloboquadrina dutertrei
type: Concept
definition: a particular species of the genus Neogloboquadrina.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: identified foraminifer
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

Neogloboquadrina pachyderma
type: Concept
definition: a particular species of the genus Neogloboquadrina.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: identified foraminifer
narrower: Neogloboquadrina pachyderma dextral
narrower: Neogloboquadrina pachyderma sinistral
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

Orbulina universa
type: Concept
definition: a particular species of the genus Orbulina.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: identified foraminifer
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

planktic:benthic foraminifer
type: Concept
definition: a foraminiferal index that is the ratio of planktic to benthic foraminifers (or benthic to planktic foraminifers) in a sample.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: foraminiferal index
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

total planktic foraminifers
type: Concept
definition: the total count or percentage of foraminifers in an assemblage whose habitat is floating in the water column.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: foraminiferal index
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

identified gastropod
type: Concept
definition: a gastropod that has been identified taxonomically.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: gastropod
related: loess and paleosol
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

brachiopod
type: Concept
definition: an identifiable organism that belongs to the kingdom Animalia, phylum Brachiopoda.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: organism
narrower: brachiopod index
narrower: identified brachiopod
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

identified brachiopod
type: Concept
definition: a brachiopod that has been identified taxonomically, with any information such as genus or species listed in the 'Additional Information' field.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: brachiopod
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

brachiopod index
type: Concept
definition: a measurement of brachiopods, such as a ratio or count, that is derived from a series of observations and that is used as an indicator or measure.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: brachiopod
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

fish
type: Concept
definition: an identifiable organism that belongs to the kingdom Animalia, phylum Chordata and that is a gill-bearing aquatic crainate animal that lacks limbs with digits.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: organism
narrower: fish index
narrower: identified fish
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

identified fish
type: Concept
definition: a fish that has been identified taxonomically.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: fish
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

fish index
type: Concept
definition: a measurement of fish, such as a ratio or count, that is derived from a series of observations and that is used as an indicator or measure.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: fish
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

radiolarian
type: Concept
definition: an identifiable organism that belongs to the kingdom Protozoa, order Radiolaria.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: organism
narrower: identified radiolarian
narrower: radiolarian index
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

radiolarian index
type: Concept
definition: a measurement of radiolarians, such as a ratio or count, that is derived from a series of observations and that is used as an indicator or measure.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: radiolarian
narrower: total radiolarians
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

total freshwater diatoms
type: Concept
definition: the total count or percentage of diatoms in an assemblage that are present in freshwater environments.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: diatom tolerance-based index
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

total ice diatoms
type: Concept
definition: the total count or percentage of diatoms in an assemblage whose habitat is near sea ice.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: diatom habitat-based index
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

total neritic diatoms
type: Concept
definition: the total count or percentage of planktic or benthic diatoms in an assemblage whose habitat is the marine near-coastal zone.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: diatom habitat-based index
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

total diatoms
type: Concept
definition: a diatom index that is the total number of diatoms in a sample.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: diatom index
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

total copiotrophic diatoms
type: Concept
definition: the total count or percentage of diatoms in an assemblage tolerant of plentiful nutrients, eg, as occur in upwelling zones.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: diatom tolerance-based index
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

total warm water diatoms
type: Concept
definition: the total count or percentage of diatoms in an assemblage tolerant of warm water.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: diatom tolerance-based index
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

silicoflagellate
type: Concept
definition: an identifiable organism that is a unicellular algae and that belongs to kingdom Chromista, order Dictyochales.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: organism
narrower: identified silicoflagellate
narrower: silicoflagellate index
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

silicoflagellate index
type: Concept
definition: a measurement of silicoflagellates, such as a ratio or count, that is derived from a series of observations and that is used as an indicator or measure.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: silicoflagellate
narrower: total silicoflagellates
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

benthic foraminifer
type: Concept
definition: a foraminifer who lives free on or in sediments (motile) or attached to substrata (sessile).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: foraminifer
narrower: agglutinated foraminifer
narrower: calcareous benthic foraminifer
related: paleoceanography
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

planktic foraminifer
type: Concept
definition: a foraminifer who lives floating in the water column.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: foraminifer
narrower: Acarinina sp.
narrower: Globigerina sp.
narrower: Globigerinella sp.
narrower: Globigerinoides sp.
narrower: Globorotalia sp.
narrower: Neogloboquadrina sp.
narrower: Orbulina sp.
narrower: Pulleniatina sp.
narrower: Trilobatus sp.
narrower: Turborotalita sp.
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

Cibicidoides sp.
type: Concept
definition: any foraminifer that belongs to the genus Cibicidoides.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: calcareous benthic foraminifer
narrower: Cibicidoides kullenbergi
narrower: Cibicidoides lobatulus
narrower: Cibicidoides mundulus
narrower: Cibicidoides pachyderma
narrower: Cibicidoides wuellerstorfi
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

Cibicidoides wuellerstorfi
type: Concept
definition: a particular species of the genus Cibicidoides.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: Cibicidoides sp.
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

coccolithophore
type: Concept
definition: an identifiable organism that is a unicellular phytoplankton and that belongs to the kingdom Chromista, phylum Haptophyta, class Prymnesiophyceae.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: organism
narrower: calcareous nannofossil
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

dolomite
type: Concept
definition: a carbonate with the formula CaMg(CO3)2.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: carbonate
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

fish
type: Concept
definition: an identifiable organism that belongs to the kingdom Animalia, phylum Chordata and that is a gill-bearing aquatic crainate animal that lacks limbs with digits.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: organism
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

Globigerina sp.
type: Concept
definition: any foraminifer that belongs to the genus Globigerina.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: planktic foraminifer
narrower: Globigerina bulloides
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

Globigerina bulloides
type: Concept
definition: a particular species of the genus Globigerina.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: Globigerina sp.
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

Globigerinoides sp.
type: Concept
definition: any foraminifer that belongs to the genus Globigerinoides.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: planktic foraminifer
narrower: Globigerinoides ruber
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

Globigerinoides ruber
type: Concept
definition: a particular species of the genus Globigerinoides.
alternative label: Globigerinoides rubra
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: Globigerinoides sp.
narrower: Globigerinoides ruber pink
narrower: Globigerinoides ruber sensu lato
narrower: Globigerinoides ruber sensu stricto
narrower: Globigerinoides ruber white
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

Trilobatus sacculifer
type: Concept
definition: a particular species of the genus Trilobatus.
alternative label: Globigerinoides sacculifer
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: Trilobatus sp.
narrower: Trilobatus sacculifer with sac
narrower: Trilobatus sacculifer without sac
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

Globorotalia sp.
type: Concept
definition: any foraminifer that belongs to the genus Globorotalia.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: planktic foraminifer
narrower: Globorotalia crassaformis
narrower: Globorotalia hirsuta
narrower: Globorotalia inflata
narrower: Globorotalia menardii
narrower: Globorotalia truncatulinoides
narrower: Globorotalia tumida
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

Globorotalia menardii
type: Concept
definition: a particular species of the genus Globorotalia.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: Globorotalia sp.
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

Globorotalia truncatulinoides
type: Concept
definition: a particular species of the genus Globorotalia.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: Globorotalia sp.
narrower: Globorotalia truncatulinoides encrusted
narrower: Globorotalia truncatulinoides non-encrusted
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

loess
type: Concept
definition: dust that is deposited on the land surface by winds.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: dust
related: loess and paleosol
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

Neogloboquadrina sp.
type: Concept
definition: any foraminifer that belongs to the genus Neogloboquadrina.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: planktic foraminifer
narrower: Neogloboquadrina dutertrei
narrower: Neogloboquadrina incompta
narrower: Neogloboquadrina pachyderma
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

Neogloboquadrina dutertrei
type: Concept
definition: a particular species of the genus Neogloboquadrina.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: Neogloboquadrina sp.
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

Neogloboquadrina pachyderma
type: Concept
definition: a particular species of the genus Neogloboquadrina.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: Neogloboquadrina sp.
narrower: Neogloboquadrina pachyderma dextral
narrower: Neogloboquadrina pachyderma sinistral
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

Orbulina sp.
type: Concept
definition: any foraminifer that belongs to the genus Orbulina.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: planktic foraminifer
narrower: Orbulina universa
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

Orbulina universa
type: Concept
definition: a particular species of the genus Orbulina.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: Orbulina sp.
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

sponge
type: Concept
definition: an identifiable organism that belongs to the kingdom Animalia, phylum Porifera.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: organism
narrower: sclerosponge
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

volcanic material
type: Concept
definition: a bulk geological material that that consists of mineral particles that originated from a volcano.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: mineral matter
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

Uvigerina sp.
type: Concept
definition: any foraminifer that belongs to the genus Uvigerina.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: calcareous benthic foraminifer
narrower: Uvigerina peregrina
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

Uvigerina peregrina
type: Concept
definition: a particular species of the genus Uvigerina.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: Uvigerina sp.
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

blue-yellow contrast
type: Concept
definition: an axis of the CIE L*a*b* color system, with negative values indicating blue and positive values indicating yellow.
alternative label: b*
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: CIE L*a*b* color system
related: loess and paleosol
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

chlorin
type: Concept
definition: an organic pigment with the formula C20H16N4.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: organic pigment
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

chroma
type: Concept
definition: a dimension of the Munsell color system that represents color purity or saturation, with lower values indicating less saturation.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: Munsell color system
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

coccolithophore
type: Concept
definition: an identifiable organism that is a unicellular phytoplankton and that belongs to the kingdom Chromista, phylum Haptophyta, class Prymnesiophyceae.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: organism
narrower: coccolithophore index
narrower: identified coccolithophore
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

characteristic remanent magnetization declination
type: Concept
definition: the angle of offset between the magnetic north of a sample's characteristic remanent magnetization and true north.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: characteristic remanent magnetization
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

delta 30Si
type: Concept
definition: the ratio of two isotopes of silicon, 30Si/28Si, in a sample compared to that of a standard, typically NBS 28, as in: ((30Si/28Si sample)/(30Si/28Si standard) - 1) x 1000.
alternative label: d30Si
alternative label: delta Si30
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: isotope ratio
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

echinoid
type: Concept
definition: an identifiable organism including urchins and sand dollars that belongs to the kingdom Animalia, phylum Echinodermata, class Echinoidea.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: organism
narrower: echinoid index
narrower: identified echinoid
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

total dinocysts
type: Concept
definition: the total count of dinocysts in a sample.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: dinoflagellate index
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

granule
type: Concept
definition: the abundance or concentration of particles with a diameter of 2 to 4 millimeters.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: grain size class
related: loess and paleosol
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

hue
type: Concept
definition: a dimension of the Munsell color system that represents the differentiation between red, yellow, green, blue and purple.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: Munsell color system
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

impedance
type: Concept
definition: an electrical property that quantifies the measure of opposition that a circuit presents to a current from an applied voltage.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: electrical property
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

characteristic remanent magnetization inclination
type: Concept
definition: the angle between a horizontal plane and the characteristic remanent magnetization field lines of a material. This quantity can be used to infer paleolatitude.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: characteristic remanent magnetization
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

diversity index
type: Concept
definition: an ecosystem index that quantitatively measures how many different types are in a community and how evenly individuals are distributed across the types.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: ecosystem index
narrower: Margalef diversity index
narrower: Shannon diversity index
narrower: Simpson diversity index
narrower: total species
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

Margalef diversity index
type: Concept
definition: a diversity index that measures species richness (biodiversity) as: (S-1)/ln N where S is the number of species observed and N is the total number of individuals in the sample.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: diversity index
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

red-green contrast
type: Concept
definition: an axis of the CIE L*a*b* color system, with negative values indicating green and positive values indicating red.
alternative label: a*
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: CIE L*a*b* color system
related: loess and paleosol
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

resistivity
type: Concept
definition: an electrical property that quantifies how strongly a specified material opposes the flow of an electric current.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: electrical property
related: instrumental
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

paleointensity
type: Concept
definition: a measure obtained from the characteristic remanent magnetization of a sample of the strength of the magnetic field in earth's past.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: characteristic remanent magnetization
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

productivity
type: Concept
definition: an ecosystem process variable that quantifies the rate of generation of biomass in an ecosystem.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: ecosystem process
narrower: primary productivity
related: climate reconstructions
related: instrumental
related: paleoceanography
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

primary productivity
type: Concept
definition: a measurement of productivity that quantifies the synthesis and storage of organic molecules during the growth and reproduction of photosynthetic organisms.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: productivity
related: climate reconstructions
related: instrumental
related: paleoceanography
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

Shannon diversity index
type: Concept
definition: a diversity index that combines the number of different types and the evenness of their proportional abundances as: -[SUM(pi ln pi)] where pi is the proportion of individuals belonging to a type and the summation is across all types.
alternative label: Shannon entropy
alternative label: Shannon-Weaver diversity index
alternative label: Shannon-Wiener diversity index
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: diversity index
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

Simpson diversity index
type: Concept
definition: a diversity index that measures how evenly individuals are distributed across types, as SUM[pi2] where pi is the proportional abundance of a type and the summation is across all types.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: diversity index
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

thickness
type: Concept
definition: a physical property that is the height of a layer or object from top to bottom.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: physical property
narrower: average cell wall thickness
narrower: layer thickness
narrower: varve thickness
created: 2018-03-26 00:00:00.0
modified: 2021-12-10 16:48:48.0

water content
type: Concept
definition: a measure of the amount of water that is contained within a material, often expressed as a weight percent.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: porosity
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

volcanic material
type: Concept
definition: a bulk geological material that that consists of mineral particles that originated from a volcano.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: mineral matter
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

5-month period
type: Concept
definition: a reconstructed seasonality that consists of five consecutive months of the calendar year.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: seasonality
narrower: Apr-Aug
narrower: Aug-Dec
narrower: Dec-Apr
narrower: Feb-Jun
narrower: Jan-May
narrower: Jul-Nov
narrower: Jun-Oct
narrower: Mar-Jul
narrower: May-Sep
narrower: Nov-Mar
narrower: Oct-Feb
narrower: Sep-Jan
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

Jan-May
type: Concept
definition: a five month period that spans the months of January to May.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 5-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

Feb-Jun
type: Concept
definition: a five month period that spans the months of February to June.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 5-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

Mar-Jul
type: Concept
definition: a five month period that spans the months of March to July.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 5-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

Apr-Aug
type: Concept
definition: a five month period that spans the months of April to August.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 5-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

May-Sep
type: Concept
definition: a five month period that spans the months of May to September.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 5-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

Jun-Oct
type: Concept
definition: a five month period that spans the months of June to October.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 5-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

Jul-Nov
type: Concept
definition: a five month period that spans the months of July to November.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 5-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

Aug-Dec
type: Concept
definition: a five month period that spans the months of August to December.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 5-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

Sep-Jan
type: Concept
definition: a five month period that spans the months of September to January.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 5-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

Oct-Feb
type: Concept
definition: a five month period that spans the months of October to February.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 5-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

Nov-Mar
type: Concept
definition: a five month period that spans the months of November to March.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 5-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

Dec-Apr
type: Concept
definition: a five month period that spans the months of December to April.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 5-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

7-month period
type: Concept
definition: a reconstructed seasonality that consists of seven consecutive months of the calendar year.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: seasonality
narrower: Apr-Oct
narrower: Aug-Feb
narrower: Dec-Jun
narrower: Feb-Aug
narrower: Jan-Jul
narrower: Jul-Jan
narrower: Jun-Dec
narrower: Mar-Sep
narrower: May-Nov
narrower: Nov-May
narrower: Oct-Apr
narrower: Sep-Mar
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

Jan-Jul
type: Concept
definition: a seven month period that spans the months of January to July.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 7-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

Feb-Aug
type: Concept
definition: a seven month period that spans the months of February to August.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 7-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

Mar-Sep
type: Concept
definition: a seven month period that spans the months of March to September.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 7-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

Apr-Oct
type: Concept
definition: a seven month period that spans the months of April to October.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 7-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

May-Nov
type: Concept
definition: a seven month period that spans the months of May to November.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 7-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

Jun-Dec
type: Concept
definition: a seven month period that spans the months of June to December.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 7-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

Jul-Jan
type: Concept
definition: a seven month period that spans the months of July to January.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 7-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

Aug-Feb
type: Concept
definition: a seven month period that spans the months of August to February.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 7-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

Sep-Mar
type: Concept
definition: a seven month period that spans the months of September to March.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 7-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

Oct-Apr
type: Concept
definition: a seven month period that spans the months of October to April.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 7-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

Nov-May
type: Concept
definition: a seven month period that spans the months of November to May.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 7-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

Dec-Jun
type: Concept
definition: a seven month period that spans the months of December to June.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 7-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

8-month period
type: Concept
definition: a reconstructed seasonality that consists of eight consecutive months of the calendar year.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: seasonality
narrower: Apr-Nov
narrower: Aug-Mar
narrower: Dec-Jul
narrower: Feb-Sep
narrower: Jan-Aug
narrower: Jul-Feb
narrower: Jun-Jan
narrower: Mar-Oct
narrower: May-Dec
narrower: Nov-Jun
narrower: Oct-May
narrower: Sep-Apr
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

9-month period
type: Concept
definition: a reconstructed seasonality that consists of nine consecutive months of the calendar year.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: seasonality
narrower: Apr-Dec
narrower: Aug-Apr
narrower: Dec-Aug
narrower: Feb-Oct
narrower: Jan-Sep
narrower: Jul-Mar
narrower: Jun-Feb
narrower: Mar-Nov
narrower: May-Jan
narrower: Nov-Jul
narrower: Oct-Jun
narrower: Sep-May
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

10-month period
type: Concept
definition: a reconstructed seasonality that consists of ten consecutive months of the calendar year.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: seasonality
narrower: Apr-Jan
narrower: Aug-May
narrower: Dec-Sep
narrower: Feb-Nov
narrower: Jan-Oct
narrower: Jul-Apr
narrower: Jun-Mar
narrower: Mar-Dec
narrower: May-Feb
narrower: Nov-Aug
narrower: Oct-Jul
narrower: Sep-Jun
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

11-month period
type: Concept
definition: a reconstructed seasonality that consists of eleven consecutive months of the calendar year.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: seasonality
narrower: Apr-Feb
narrower: Aug-Jun
narrower: Dec-Oct
narrower: Feb-Dec
narrower: Jan-Nov
narrower: Jul-May
narrower: Jun-Apr
narrower: Mar-Jan
narrower: May-Mar
narrower: Nov-Sep
narrower: Oct-Aug
narrower: Sep-Jul
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

Jan-Aug
type: Concept
definition: an eight month period that spans the months of January to August.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 8-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

Feb-Sep
type: Concept
definition: an eight month period that spans the months of February to September.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 8-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

Mar-Oct
type: Concept
definition: an eight month period that spans the months of March to October.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 8-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

Apr-Nov
type: Concept
definition: an eight month period that spans the months of April to November.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 8-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

May-Dec
type: Concept
definition: an eight month period that spans the months of May to December.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 8-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

Jun-Jan
type: Concept
definition: an eight month period that spans the months of June to January.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 8-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

Jul-Feb
type: Concept
definition: an eight month period that spans the months of July to February.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 8-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

Aug-Mar
type: Concept
definition: an eight month period that spans the months of August to March.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 8-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

Sep-Apr
type: Concept
definition: an eight month period that spans the months of September to April.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 8-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

Oct-May
type: Concept
definition: an eight month period that spans the months of October to May.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 8-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

Nov-Jun
type: Concept
definition: an eight month period that spans the months of November to June.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 8-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

Dec-Jul
type: Concept
definition: an eight month period that spans the months of December to July.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 8-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

Jan-Sep
type: Concept
definition: a nine month period that spans the months of January to September.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 9-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

Feb-Oct
type: Concept
definition: a nine month period that spans the months of February to October.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 9-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

Mar-Nov
type: Concept
definition: a nine month period that spans the months of March to November.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 9-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

Apr-Dec
type: Concept
definition: a nine month period that spans the months of April to December.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 9-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

May-Jan
type: Concept
definition: a nine month period that spans the months of May to January.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 9-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

Jun-Feb
type: Concept
definition: a nine month period that spans the months of June to February.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 9-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

Jul-Mar
type: Concept
definition: a nine month period that spans the months of July to March.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 9-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

Aug-Apr
type: Concept
definition: a nine month period that spans the months of August to April.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 9-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

Sep-May
type: Concept
definition: a nine month period that spans the months of September to May.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 9-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

Oct-Jun
type: Concept
definition: a nine month period that spans the months of October to June.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 9-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

Nov-Jul
type: Concept
definition: a nine month period that spans the months of November to July.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 9-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

Dec-Aug
type: Concept
definition: a nine month period that spans the months of December to August.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 9-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

Jan-Oct
type: Concept
definition: a ten month period that spans the months of January to October.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 10-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

Feb-Nov
type: Concept
definition: a ten month period that spans the months of February to November.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 10-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

Mar-Dec
type: Concept
definition: a ten month period that spans the months of March to December.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 10-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

Apr-Jan
type: Concept
definition: a ten month period that spans the months of April to January.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 10-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

May-Feb
type: Concept
definition: a ten month period that spans the months of May to February.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 10-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

Jun-Mar
type: Concept
definition: a ten month period that spans the months of June to March.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 10-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

Jul-Apr
type: Concept
definition: a ten month period that spans the months of July to April.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 10-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

Aug-May
type: Concept
definition: a ten month period that spans the months of August to May.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 10-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

Sep-Jun
type: Concept
definition: a ten month period that spans the months of September to June.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 10-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

Oct-Jul
type: Concept
definition: a ten month period that spans the months of October to July.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 10-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

Nov-Aug
type: Concept
definition: a ten month period that spans the months of November to August.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 10-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

Dec-Sep
type: Concept
definition: a ten month period that spans the months of December to September.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 10-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

Jan-Nov
type: Concept
definition: an eleven month period that spans the months of January to November.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 11-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

Feb-Dec
type: Concept
definition: an eleven month period that spans the months of February to December.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 11-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

Mar-Jan
type: Concept
definition: an eleven month period that spans the months of March to January.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 11-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

Apr-Feb
type: Concept
definition: an eleven month period that spans the months of April to February.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 11-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

May-Mar
type: Concept
definition: an eleven month period that spans the months of May to March.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 11-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

Jun-Apr
type: Concept
definition: an eleven month period that spans the months of June to April.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 11-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

Jul-May
type: Concept
definition: an eleven month period that spans the months of July to May.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 11-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

Aug-Jun
type: Concept
definition: an eleven month period that spans the months of August to June.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 11-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

Sep-Jul
type: Concept
definition: an eleven month period that spans the months of September to July.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 11-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

Oct-Aug
type: Concept
definition: an eleven month period that spans the months of October to August.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 11-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

Nov-Sep
type: Concept
definition: an eleven month period that spans the months of November to September.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 11-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

Dec-Oct
type: Concept
definition: an eleven month period that spans the months of December to October.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 11-month period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

growing season
type: Concept
definition: a non-calendric period that encompasses the period during which rainfall and temperature allow plants to grow, without specification of certain days or months.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: non-calendric period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

coldest month
type: Concept
definition: a non-calendric period that is defined as the coldest month of the year, with the actual calendar month being specific to a given geographic location and era.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: non-calendric period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

warmest month
type: Concept
definition: a non-calendric period that is defined as the warmest month of the year, with the actual calendar month being specific to a given geographic location and era.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: non-calendric period
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

Orbicella franksi
type: Concept
definition: a particular species of the genus Orbicella that is commonly known as the boulder star coral.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: Orbicella sp.
related: corals and sclerosponges
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

Goniopora sp.
type: Concept
definition: any coral that belongs to the genus Goniopora.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: coral
narrower: Goniopora hilli
related: corals and sclerosponges
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

Goniopora hilli
type: Concept
definition: a particular species of the genus Goniopora.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: Goniopora sp.
related: corals and sclerosponges
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

alanine
type: Concept
definition: an amino acid with the formula C3H7NO2.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: amino acid
related: corals and sclerosponges
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

arginine
type: Concept
definition: an amino acid with the formula C6H14N4O2.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: amino acid
related: corals and sclerosponges
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

Atlantic Multidecadal Oscillation Index
type: Concept
definition: a circulation index that is calculated from the detrended average anomalies of sea surface temperatures in the North Atlantic basin, usually from 0 to 80 degrees north and that represents internal (unforced variability).
alternative label: AMO
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: circulation index
related: climate reconstructions
related: instrumental
related: tree ring
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

La Niña event
type: Concept
definition: an index of the El Niño Southern Oscillation that quantifies the occurrence of anomalously cold sea surface temperatures in the eastern tropical Pacific.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: El Niño Southern Oscillation Index
related: climate reconstructions
related: historical
related: instrumental
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

ice sheet elevation
type: Concept
definition: a cryospheric quantity that is the elevation of the surface of a glacier, ice-cap or ice-sheet resting on bedrock or an ice-shelf, measured relative to some datum.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: cryospheric quantity
related: climate reconstructions
related: ice cores
related: instrumental
related: paleoclimatic modeling
related: speleothems
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

ice sheet volume
type: Concept
definition: a cryospheric quantity that is the volume of ice in a glacier, ice-cap or ice-sheet resting on bedrock or an ice-shelf.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: cryospheric quantity
related: instrumental
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

ice calving
type: Concept
definition: the ice mass loss from a glacier, ice-cap, ice-sheet, or ice-shelf through calving into the ocean or other body of water
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: ice mass loss
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-08-14 17:48:38.0

non-freezing days
type: Concept
definition: a temperature index that counts the number of days with minimum temperatures above 0 degrees Celsius.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: temperature index
related: climate reconstructions
related: instrumental
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

sea level pressure
type: Concept
definition: a pressure variable that is the atmospheric pressure at sea level at a given location and time. When observed at a reporting station that is not at sea level, which is nearly all stations, it is a correction of the station pressure to sea level.
alternative label: SLP
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: pressure variable
related: climate reconstructions
related: historical
related: instrumental
related: paleoclimatic modeling
related: tree ring
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

wind speed
type: Concept
definition: a velocity variable that is the velocity of wind at some height in the atmosphere.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: velocity variable
narrower: eastward wind speed
narrower: northward wind speed
related: climate reconstructions
related: corals and sclerosponges
related: historical
related: instrumental
related: paleoceanography
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

snow water equivalent
type: Concept
definition: the amount of water contained in snowpack, typically expressed as a depth.
alternative label: SWE
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: cryospheric quantity
related: climate reconstructions
related: instrumental
related: paleoclimatic modeling
related: tree ring
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

precipitation minus evapotranspiration
type: Concept
definition: the hydroclimatic rate that is the difference in rate between precipitation at the land surface and evaporation and transpiration from the land surface.
alternative label: P-ET
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: hydroclimate rate
related: climate reconstructions
related: instrumental
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

precipitation minus potential evapotranspiration
type: Concept
definition: the hydroclimatic rate that is the difference in rate between precipitation at the land surface and the evaporation that would occur from the land surface if a sufficient water source were available.
alternative label: P-PET
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: hydroclimate rate
related: climate reconstructions
related: instrumental
related: tree ring
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

squared chord distance
type: Concept
definition: a dissimilarity measure that is calculated as the proportional representation of a species P (Pij^1/2 - Pik^1/2)^2 summed across all species i for two samples j and k.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: dissimilarity measure
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

South Asian Summer Monsoon Index
type: Concept
definition: a circulation index that describes the South Asian monsoon circulation using the difference between 850 hPa and 200 hPa wind speeds averaged over the region 10-30N, 70-110 E.
alternative label: SASM
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: circulation index
related: climate reconstructions
related: instrumental
related: tree ring
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

California Current Index
type: Concept
definition: a circulation index that is calculated as the leading principal component of sea level at San Francisco, an upwelling index, and the Northern Oscillation Index (i.e., the difference in sea level pressure anomalies between the North Pacific High and Darwin, Australia).
alternative label: CCI
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: circulation index
related: climate reconstructions
related: instrumental
related: tree ring
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

Southern Annular Mode
type: Concept
definition: a circulation index that describes the low-frequency variability of the Southern Hemisphere extratropics and that is calculated from the difference of zonal mean sea level pressure between 40S and 65S latitude.
alternative label: AAO
alternative label: Antarctic oscillation
alternative label: SAM
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: circulation index
related: climate reconstructions
related: instrumental
related: tree ring
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

aragonite saturation state
type: Concept
definition: a solution property that is defined as the product of the concentrations of dissolved calcium and carbonate ions in seawater divided by the product of aragonite at equilibrium.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: solution property
related: climate reconstructions
related: instrumental
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

cloud cover
type: Concept
definition: the hydroclimate ratio of total sky obscured by clouds when measured from a particular location.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: hydroclimate ratio
related: climate reconstructions
related: historical
related: instrumental
related: paleoclimatic modeling
related: tree ring
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

surface downwelling shortwave radiation
type: Concept
definition: the radiative flux that is the amount of shortwave (solar) radiation from above that is measured at the lower boundary of the atmosphere.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: radiative flux variable
related: climate reconstructions
related: paleoclimatic modeling
related: tree ring
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

correlation coefficient
type: Concept
definition: a goodness-of-fit measure that quantifies the strength and direction of the linear relationship between two variables and that is defined as the (sample) covariance of the variables divided by the product of their (sample) standard deviations.
alternative label: R
alternative label: r
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: goodness-of-fit measure
narrower: average correlation coefficient
narrower: expressed population signal
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

Interdecadal Pacific Oscillation Index
type: Concept
definition: a circulation index that is calculated from modern observations as the second principal component of low-frequency filtered or smoothed sea surface temperatures generally between 60 degrees north and 40 degrees south latitude, either over the Pacific Basin or globally.
alternative label: IPO
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: circulation index
related: climate reconstructions
related: corals and sclerosponges
related: instrumental
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

plant available moisture
type: Concept
definition: an ecosystem quantity that measures the difference in water content in soil between field capacity and the permanent wilting point.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: ecosystem quantity
related: climate reconstructions
related: instrumental
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

eustatic sea level
type: Concept
definition: sea level that is the result of a change in the volume of water in the earth's oceans or of net changes in the volumes of the ocean basins.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: sea level
related: climate reconstructions
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

standardized precipitation evapotranspiration index
type: Concept
definition: a hydroclimate index that is based on the cumulative probability of a given rainfall event at a particular station in combination with the role of temperature on evapotranspiration.
alternative label: SPEI
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: hydroclimate index
related: climate reconstructions
related: instrumental
related: tree ring
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

Pacific-North American Pattern
type: Concept
definition: a circulation index that is calculated from 500 hPa geopotential height anomalies at four locations over the Pacific and North America or from the second principal component of Northern Hemisphere extratropical sea level pressure anomalies, and that relates to temperature and precipitation anomalies over North America.
alternative label: PNA
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: circulation index
related: climate reconstructions
related: instrumental
related: tree ring
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

Palmer Modified Drought Index
type: Concept
definition: a hydroclimate index that employs temperature and precipitation information, as an operational version of the Palmer Drought Severity Index, to estimate relative dryness taking into consideration the cumulative nature of long-term drought.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: hydroclimate index
related: climate reconstructions
related: instrumental
related: tree ring
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

standardized precipitation index
type: Concept
definition: a hydroclimate index that is based on the cumulative probability of a given rainfall event at a particular station.
alternative label: SPI
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: hydroclimate index
related: climate reconstructions
related: instrumental
related: tree ring
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

sulfur/calcium
type: Concept
definition: the elemental ratio of sulfur to calcium.
alternative label: S/Ca
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or compound ratio
related: speleothems
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

68% confidence interval margin of error
type: Concept
definition: the value, that when added to and subtracted from the mean estimate, creates a confidence interval that captures the true value 68% of the time.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: confidence interval
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

RGB color system
type: Concept
definition: reflectance that is quantified within an additive color model of the three primary colors.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: reflectance
narrower: blue intensity
narrower: green intensity
narrower: red intensity
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

CIE L*a*b* color system
type: Concept
definition: reflectance that is quantified according to the International Commission on Illumination (CIE) color space defined by one lightness axis and two chrominance axes, exceeding those colors visible to humans.
alternative label: CIELAB color system
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: reflectance
narrower: blue-yellow contrast
narrower: lightness
narrower: red-green contrast
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

CIEXYZ color system
type: Concept
definition: reflectance that is quantified according to the International Commission on Illumination (CIE) color space defined by three parameters that are mathematical extrapolations of the Red-Green-Blue (RGB) color space that is visible to humans.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: reflectance
narrower: CIE X
narrower: CIE Y
narrower: CIE Z
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

Munsell color system
type: Concept
definition: reflectance that is quantified according to three independent dimensions and based in human visual perception.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: reflectance
narrower: chroma
narrower: hue
narrower: value
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

value
type: Concept
definition: a dimension of the Munsell color system that represents lightness, with zero being black and 10 being white.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: Munsell color system
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

CIE X
type: Concept
definition: a parameter of the CIEXYZ color system that is a mix of cone response curves chosen to be non-negative (Credit: Wikipedia).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: CIEXYZ color system
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

CIE Y
type: Concept
definition: a parameter of the CIEXYZ color system that is a measure of luminance.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: CIEXYZ color system
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

CIE Z
type: Concept
definition: a parameter of the CIEXYZ color system that is a approximately equal to blue color.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: CIEXYZ color system
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

germanium
type: Concept
definition: a chemical element with atomic number 32.
alternative label: Ge
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or single-element molecule
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

platinum
type: Concept
definition: a chemical element with atomic number 78.
alternative label: Pt
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or single-element molecule
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

polonium
type: Concept
definition: a chemical element with atomic number 84.
alternative label: Po
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or single-element molecule
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

historical
type: Concept
definition: a data type that includes measurements of past climatic conditions and climate-dependent phenomena as observed and recorded by humans not using modern meteorological instruments.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: data type
related: El Niño event
related: International Geo Sample Number
related: La Niña event
related: North Atlantic Oscillation Index
related: Pacific Decadal Oscillation Index
related: age
related: age at sample end
related: age at sample start
related: air temperature
related: cloud cover
related: collection date
related: collection elevation
related: collection water depth
related: geopotential height
related: grain harvest date
related: grape harvest date
related: ice break-up date
related: lake surface temperature
related: land surface temperature
related: latitude
related: longitude
related: maximum air temperature
related: maximum surface temperature
related: maximum temperature
related: minimum air temperature
related: minimum surface temperature
related: minimum temperature
related: moisture index
related: notes
related: number of samples
related: phenological event
related: precipitation
related: sample identification
related: sea level pressure
related: sea surface temperature
related: snowfall
related: societal event
related: streamflow
related: surface air temperature
related: surface pressure
related: surface temperature
related: temperature
related: tropical cyclone
related: wind direction
related: wind speed
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

instrumental
type: Concept
definition: a data type that includes measurements of climate conditions and climate-dependent phenomena made by humans using modern meteorological instruments.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: data type
related: Arctic Oscillation Index
related: Atlantic Multidecadal Oscillation Index
related: Atlantic Multidecadal Variability Index
related: C3 plants
related: C37 alkenone
related: C37:2 alkenone
related: C37:3 alkenone
related: C37:4 alkenone
related: C4 plants
related: California Current Index
related: Delta 14C
related: Dipole Mode Index
related: El Niño Southern Oscillation Index
related: El Niño event
related: Hadley circulation index
related: Interdecadal Pacific Oscillation Index
related: International Geo Sample Number
related: La Niña event
related: Niño 1+2 sea surface temperature index
related: Niño 3 sea surface temperature index
related: Niño 3.4 sea surface temperature index
related: Niño 4 sea surface temperature index
related: North Atlantic Oscillation Index
related: Northern Oscillation Index
related: Pacific Decadal Oscillation Index
related: Pacific-North American Pattern
related: Palmer Drought Severity Index
related: Palmer Hydrologic Drought Index
related: Palmer Modified Drought Index
related: South Asian Summer Monsoon Index
related: South Pacific Convergence Zone Index
related: Southern Annular Mode
related: Southern Oscillation Index
related: Upwelling Index
related: actual/potential evapotranspiration
related: aerosol optical depth
related: air potential temperature
related: air temperature
related: alkalinity
related: alkenone unsaturation index
related: alkenone unsaturation index Uk37
related: alkenone unsaturation index Uk37 prime
related: ammonium
related: apparent oxygen utilization
related: aragonite saturation state
related: barium
related: bedrock elevation
related: biome
related: borate ion
related: boron
related: bulk atmosphere
related: burned area
related: calcite saturation state
related: calcium
related: carbon dioxide
related: carbonate ion
related: chlorofluorocarbon
related: chlorofluorocarbon-11
related: chlorofluorocarbon-12
related: cloud cover
related: collection date
related: collection elevation
related: collection water depth
related: delta 11B
related: delta 13C
related: delta 15N
related: delta 18O
related: delta 2H
related: delta 2H apparent fractionation factor
related: density
related: deuterium excess
related: dissociation constant
related: dissolved inorganic carbon
related: dissolved oxygen
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

grain size kurtosis
type: Concept
definition: a measure of the sharpness of the peak of the grain size frequency distribution. The kurtosis of a univariate normal distribution is 3; values less than this indicate a flatter distribution and values greater than this indicate a more peaked distribution.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: grain size parameter
related: loess and paleosol
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

grain size skewness
type: Concept
definition: a measure of the asymmetry of the grain size frequency distribution around the mean value. Negative values indicate that the left tail of the distribution is longer than the right tail (i.e., the mass of the distribution is concentrated on the right), and vice versa for positive values.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: grain size parameter
related: loess and paleosol
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

sulfate mineral
type: Concept
definition: an identified mineral with the sulfate radical SO4.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: identified mineral
narrower: amarillite
narrower: anglesite
narrower: blödite
narrower: butlerite
narrower: caracolite
narrower: glauberite
narrower: gypsum
narrower: letovicite
narrower: mercallite
narrower: thénardite
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

gypsum
type: Concept
definition: a sulfate mineral with the formula CaSO4·2(H2O).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: sulfate mineral
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

andesine
type: Concept
definition: a plagioclase feldspar mineral that has the general formula (Ca,Na)Al(Si,Al)Si2O8 with 50-70% Na and 30-50% Ca.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: plagioclase feldspar series
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

phosphate mineral
type: Concept
definition: an identified mineral that contains tetrahedral PO43- groups (Credit: Dictionary of Geological Terms).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: identified mineral
narrower: anapaite
narrower: bearsite
narrower: brushite
narrower: chalcosiderite
narrower: vivianite
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

anapaite
type: Concept
definition: a phosphate mineral with the formula Ca2Fe(2+)(PO4)2·4H2O.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: phosphate mineral
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

mercallite
type: Concept
definition: a sulfate mineral with the formula KHSO4.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: sulfate mineral
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

gaultite
type: Concept
definition: a silicate mineral with the formula Na4Zn2Si7O18·5H2O.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: silicate mineral
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

birnessite
type: Concept
definition: an oxide mineral with the formula (Na,Ca)0.5(Mn4+,Mn3+)2O4·1.5H2O.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: oxide and hydroxide minerals
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

almandine
type: Concept
definition: a silicate mineral with the formula Fe3(2+)Al2(SiO4)3.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: silicate mineral
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

geocronite
type: Concept
definition: a sulfide mineral with the formula Pb14(Sb,As)6S23.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: sulfide mineral
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

nitrogen/sulfur
type: Concept
definition: the elemental ratio of nitrogen to sulfur.
alternative label: N/S
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or compound ratio
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

leakeite
type: Concept
definition: an amphibole with the formula NaNa2(Mg2Al2Li)(Si8O22)(OH2).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: amphibole
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

glauberite
type: Concept
definition: a sulfate mineral with the formula Na2Ca(SO4)2.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: sulfate mineral
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

thénardite
type: Concept
definition: a sulfate mineral with the formula Na2SO4.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: sulfate mineral
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

cordierite
type: Concept
definition: a silicate mineral with the formula Mg2Al4Si5O18.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: silicate mineral
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

cebaite
type: Concept
definition: a carbonate with the formula Ba3Ce2(CO3)5F2.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: carbonate
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

dickite
type: Concept
definition: a kaolinite mineral with the formula Al2Si2O5(OH)4.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: kaolinite
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

pyrope
type: Concept
definition: a silicate mineral with the formula Mg3Al2(SiO4)3.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: silicate mineral
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

ankerite
type: Concept
definition: a carbonate with the formula CaFe(2+)(CO3)2.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: carbonate
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

cristobalite
type: Concept
definition: a silicate mineral with the formula SiO2.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: silicate mineral
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

clinochlore
type: Concept
definition: a chlorite mineral with the formula Mg5Al(AlSi3O10)(OH)8.
alternative label: leuchtenbergite
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: chlorite
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

blödite
type: Concept
definition: a sulfate mineral with the formula Na2Mg(SO4)2·4H2O.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: sulfate mineral
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

covellite
type: Concept
definition: a sulfide mineral with the formula CuS.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: sulfide mineral
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

bearsite
type: Concept
definition: an arsenate mineral with the formula Be2AsO4(OH)·4H2O.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: phosphate mineral
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

chamosite
type: Concept
definition: a chlorite mineral with the formula (Fe2+,Mg,Al,Fe3+)6(Si,Al)4O10(OH,O)8.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: chlorite
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

andradite
type: Concept
definition: a silicate mineral with the formula Ca3Fe2(3+)(SiO4)3.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: silicate mineral
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

amarillite
type: Concept
definition: a sulfate mineral with the formula NaFe(3+)(SO4)2·6H2O.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: sulfate mineral
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

organic compound mineral
type: Concept
definition: an identified mineral that is a hydrocarbon, a salt of an organic acid, or has some other source from a biological material.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: identified mineral
narrower: kafehydrocyanite
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

kafehydrocyanite
type: Concept
definition: an organic compound mineral with the formula K4[Fe(CN)6]·H2O.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: organic compound mineral
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

letovicite
type: Concept
definition: a sulfate mineral with the formula (NH4)3H(SO4)2.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: sulfate mineral
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

butlerite
type: Concept
definition: a sulfate mineral with the formula Fe(3+)SO4(OH)·2H2O.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: sulfate mineral
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

richterite
type: Concept
definition: an amphibole with the formula Na2CaMg5Si8O22(OH)2.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: amphibole
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

chrysoberyl
type: Concept
definition: an oxide mineral with the formula BeAl2O4.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: oxide and hydroxide minerals
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

cronstedtite
type: Concept
definition: a serpentine mineral with the formula (Fe2+,Fe3+)3(Si,Fe3+)2 O5(OH)4.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: serpentine
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

clinoenstatite
type: Concept
definition: a pyroxene mineral with the formula MgSiO3.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: pyroxene
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

proustite
type: Concept
definition: a sulfide mineral with the formula Ag3AsS3.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: sulfide mineral
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

karelianite
type: Concept
definition: a hematite group mineral with the formula: V2O3.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: hematite group
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

chalcocite
type: Concept
definition: a sulfide mineral with the formula Cu2S.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: sulfide mineral
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

bismite
type: Concept
definition: an oxide mineral with the formula Bi2O3.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: oxide and hydroxide minerals
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

billietite
type: Concept
definition: a hydroxide mineral with the formula Ba(UO2)6O4(OH)6·8H2O.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: oxide and hydroxide minerals
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

polylithionite
type: Concept
definition: a mica group mineral with the formula: KLi2AlSi4O10F2.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: mica group
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

brushite
type: Concept
definition: a phosphate mineral with the formula Ca(PO3OH)·2H2O.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: phosphate mineral
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

caracolite
type: Concept
definition: a sulfate mineral with the formula Na2(Pb2Na)(SO4)3Cl).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: sulfate mineral
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

anglesite
type: Concept
definition: a sulfate mineral with the formula PbSO4.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: sulfate mineral
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

chkalovite
type: Concept
definition: a silicate mineral with the formula Na2BeSi2O6.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: silicate mineral
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

kaersutite
type: Concept
definition: an amphibole with the formula NaCa2(Mg3Ti(4+)Al)(Si6Al2)O22O2.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: amphibole
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

chalcosiderite
type: Concept
definition: a phosphate mineral with the formula CuFe6(3+)(PO4)4(OH)8·4H2O.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: phosphate mineral
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

elpidite
type: Concept
definition: a silicate mineral with the formula Na2ZrSi6O15·3H2O.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: silicate mineral
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

magnetic ratios
type: Concept
definition: ratios of two magnetic properties, commonly used as indicators of past environmental conditions.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: magnetic property
narrower: S-ratio
narrower: anhysteretic remanent magnetization/isothermal remanent magnetization
narrower: anhysteretic remanent magnetization/magnetic susceptibility
narrower: anhysteretic remanent magnetization/saturation isothermal remanent magnetization
narrower: coercivity of remanence/coercivity
narrower: initial magnetization slope
narrower: natural remanent magnetization/anhysteretic remanent magnetization
narrower: natural remanent magnetization/isothermal remanent magnetization
narrower: saturation isothermal remanent magnetization/initial magnetization slope
narrower: saturation isothermal remanent magnetization/magnetic susceptibility
narrower: saturation isothermal remanent magnetization/saturation isothermal magnetization
narrower: saturation remanent magnetization/saturation magnetization
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

remanent magnetization
type: Concept
definition: a magnetic moment that is the magnetization remaining in a sample after exposure to an external magnetic field.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: magnetic moments
narrower: anhysteretic remanent magnetization
narrower: isothermal remanent magnetization
narrower: natural remanent magnetization
narrower: saturation remanent magnetization
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

magnetic field properties
type: Concept
definition: a magnetic property that measures the direction and/or strength of a magnetic field.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: magnetic property
narrower: coercivity
narrower: median destructive field
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

magnetic moments
type: Concept
definition: a magnetic property that measures the tendency of a material to interact with an external magnetic field.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: magnetic property
narrower: magnetic susceptibility
narrower: remanent magnetization
narrower: saturation magnetization
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

atomic spectroscopy
type: Concept
definition: electronic spectroscopy that is based upon the ability of atoms to absorb or emit electromagnetic radiation. In atomic spectroscopy the sample is vaporized and then atomized (Credit: Chemical Methods Ontology).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: electronic spectroscopy
narrower: atomic absorption spectroscopy
narrower: cold vapor atomic fluorescence spectroscopy
narrower: inductively-coupled plasma atomic emission spectroscopy
narrower: laser-induced breakdown spectroscopy
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

vibrational spectroscopy
type: Concept
definition: spectroscopy which probes the vibrational degrees of freedom of a molecule (Credit: Chemical Methods Ontology).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: spectroscopy
narrower: fourier transform infrared spectroscopy
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

diatom morphology-based index
type: Concept
definition: a diatom index that indicates environmental conditions based on the morphological types of diatoms in a sample.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: diatom index
narrower: total centric diatoms
narrower: total pennate diatoms
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

diatom habitat-based index
type: Concept
definition: a diatom index that indicates environmental conditions based on the habitat preferences of diatoms in a sample.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: diatom index
narrower: total aerophilic diatoms
narrower: total benthic diatoms
narrower: total edaphic diatoms
narrower: total ice diatoms
narrower: total meroplanktic diatoms
narrower: total neritic diatoms
narrower: total planktic diatoms
narrower: total rheophilic diatoms
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

identified diatom
type: Concept
definition: a diatom that has been identified taxonomically.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: diatom
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

diatom tolerance-based index
type: Concept
definition: a diatom index that indicates environmental conditions based on the environmental tolerances of diatoms in a sample.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: diatom index
narrower: total acidiphilic diatoms
narrower: total alkaliphilic diatoms
narrower: total cold water diatoms
narrower: total copiotrophic diatoms
narrower: total deep water diatoms
narrower: total freshwater diatoms
narrower: total oligotrophic diatoms
narrower: total saline diatoms
narrower: total salinity indifferent diatoms
narrower: total shallow water diatoms
narrower: total warm water diatoms
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

diatom ratio
type: Concept
definition: a diatom index that indicates environmental conditions based on the ratio of two different groups of diatoms in a sample.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: diatom index
narrower: araphid:raphid diatom
narrower: centric:pennate diatom
narrower: neritic:pelagic diatom
narrower: planktic:benthic diatom
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

total rheophilic diatoms
type: Concept
definition: the total count or percentage of diatoms in an assemblage whose habitats include flowing water and waves.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: diatom habitat-based index
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

total aerophilic diatoms
type: Concept
definition: the total count or percentage of diatoms in an assemblage whose habitats include air, shorelines, and wet walls.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: diatom habitat-based index
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

total edaphic diatoms
type: Concept
definition: the total count or percentage of diatoms in an assemblage whose habitats include soil.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: diatom habitat-based index
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

total meroplanktic diatoms
type: Concept
definition: the total count or percentage of diatoms in an assemblage that spend some of their lifecycle resting on the sediment and some floating in the water column.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: diatom habitat-based index
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

total epizoic diatoms
type: Concept
definition: the total count or percentage of benthic diatoms in an assemblage whose habitat is attached to a biotic host.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: total benthic diatoms
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

total epilithic diatoms
type: Concept
definition: the total count or percentage of benthic diatoms in an assemblage whose habitat is attached to rocks.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: total benthic diatoms
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

total epipelic diatoms
type: Concept
definition: the total count or percentage of benthic diatoms in an assemblage whose habitat is attached to mud.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: total benthic diatoms
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

total epiphytic diatoms
type: Concept
definition: the total count or percentage of benthic diatoms in an assemblage whose habitat is attached to plants.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: total benthic diatoms
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

total epipsammic diatoms
type: Concept
definition: the total count or percentage of benthic diatoms in an assemblage whose habitat is attached to sand.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: total benthic diatoms
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

total pelagic diatoms
type: Concept
definition: the total count or percentage of planktic diatoms in an assemblage whose habitat is the open ocean, away from coastal zones.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: total planktic diatoms
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

total raphid diatoms
type: Concept
definition: the total count or percentage of diatoms in an assemblage that are pennate and that have a raphe, or fissure in the valve that allows for movement.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: total pennate diatoms
narrower: total asymmetrical biraphid diatoms
narrower: total epithemioid diatoms
narrower: total eunotioid diatoms
narrower: total monoraphid diatoms
narrower: total nitzschioid diatoms
narrower: total surirelloid diatoms
narrower: total symmetrical biraphid diatoms
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

total araphid diatoms
type: Concept
definition: the total count or percentage of diatoms in an assemblage that are pennate and that lack a raphe, or fissure in the valve that allows for movement.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: total pennate diatoms
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

total symmetrical biraphid diatoms
type: Concept
definition: the total count or percentage of diatoms in an assemblage for which each valve has a raphe, or fissure in the valve that allows for movement, and are symmetrical to both the apical (long) and transapical (short) axes.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: total raphid diatoms
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

total asymmetrical biraphid diatoms
type: Concept
definition: the total count or percentage of diatoms in an assemblage for which each valve has a raphe, or fissure in the valve that allows for movement, and are asymmetrical in the apical (long), transapical (short) or both axes.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: total raphid diatoms
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

total monoraphid diatoms
type: Concept
definition: the total count or percentage of diatoms in an assemblage that have one valve with a raphe, or fissure in the valve that allows for movement, and one valve without a raphe.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: total raphid diatoms
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

total epithemioid diatoms
type: Concept
definition: the total count or percentage of diatoms in an assemblage that are asymmetrical to apical (long) axis and that have raphes, or fissures in the valves that allow movement, that are well developed and enclosed within a canal near the valve margin.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: total raphid diatoms
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

total surirelloid diatoms
type: Concept
definition: the total count or percentage of diatoms in an assemblage that have raphes, or fissures in the valves that allow movement, that are extremely well developed and enclosed within a canal around the entire valve margin and raised onto a keel.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: total raphid diatoms
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

total eunotioid diatoms
type: Concept
definition: the total count or percentage of diatoms in an assemblage that are often asymmetrical to the apical (long) axis and have short raphes, or fissures in the valve that allow movement.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: total raphid diatoms
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

total nitzschioid diatoms
type: Concept
definition: the total count or percentage of diatoms in an assemblage that a usuarelly symmetrical to both apical (long) and transapical (short) axes and that have raphes, or fissures in the valves that allow movement, that are well developed, and positioned near the valve margin within a canal and may be raised onto a keel.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: total raphid diatoms
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

centric:pennate diatom
type: Concept
definition: the ratio of centric to pennate diatoms in a sample.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: diatom ratio
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

neritic:pelagic diatom
type: Concept
definition: the ratio of neritic to pelagic diatoms in a sample.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: diatom ratio
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

araphid:raphid diatom
type: Concept
definition: the ratio of araphid to raphid diatoms in a sample.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: diatom ratio
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

total cold water diatoms
type: Concept
definition: the total count or percentage of diatoms in an assemblage tolerant of cold water.
alternative label: dicothermal diatoms
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: diatom tolerance-based index
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

total oligotrophic diatoms
type: Concept
definition: the total count or percentage of diatoms in an assemblage that are present in environments with low nutrient levels.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: diatom tolerance-based index
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

total acidiphilic diatoms
type: Concept
definition: the total count or percentage of diatoms in an assemblage tolerant of low pH environments.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: diatom tolerance-based index
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

total alkaliphilic diatoms
type: Concept
definition: the total count or percentage of diatoms in an assemblage tolerant of high pH environments.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: diatom tolerance-based index
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

total deep water diatoms
type: Concept
definition: the total count or percentage of diatoms in an assemblage living in deep water environments characterized by, eg, low turbulence and low light levels.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: diatom tolerance-based index
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

identified midge
type: Concept
definition: an organism that belongs to one of several families in the Order Diptera and that has been identified taxonomically.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: identified insect
related: insect
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

total gastropods
type: Concept
definition: the count of total gastropod shells in a sample.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: gastropod index
related: loess and paleosol
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

scattering
type: Concept
definition: a measure of reflectance that is the amount of light in a unidirectional beam that is deflected in multiple directions by a material.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: reflectance
narrower: coherent scattering
narrower: incoherent scattering
narrower: incoherent:coherent scattering
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

coherent scattering
type: Concept
definition: a measure of scattering in x-ray fluorescence analysis, that together with incoherent scattering can be used as a proxy for the amount of organic matter in a sample.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: scattering
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

incoherent scattering
type: Concept
definition: a measure of scattering in x-ray fluorescence analysis, that together with coherent scattering can be used as a proxy for the amount of organic matter in a sample.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: scattering
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

grain size standard deviation
type: Concept
definition: the standard deviation of a grain size frequency distribution. This is a commonly-used measure of the degree of sorting (i.e., high values indicate poorer sorting).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: grain size parameter
related: loess and paleosol
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

testate amoeba
type: Concept
definition: an identifiable organism that is an ameboid protist with a test and that belongs to the kingdom Protozoa. Traditionally, those species that form large networks of anastomosing pseudopodia, despite of some of them having tests e.g. Foraminifera, are not counted amongst testate amoebae (Credit: Wikipedia).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: organism
narrower: identified testate amoeba
narrower: testate amoeba index
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

total testate amoebae
type: Concept
definition: the total count of testate amoebae in a sample.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: testate amoeba index
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

identified testate amoeba
type: Concept
definition: a testate amoeba that has been identified taxonomically.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: testate amoeba
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

chrysophyte
type: Concept
definition: an identifiable organism commonly known as golden or golden-brown algae that belongs to the kingdom Chromista, class Chrysophyceae.
alternative label: Chrysophyceae
alternative label: chrysomonads
alternative label: golden algae
alternative label: golden-brown algae
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: organism
narrower: total chrysophyte cysts
narrower: total chrysophyte scales
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

total chrysophyte cysts
type: Concept
definition: the total count of siliceous stomatocysts (resistant spores) of Chrysophyte algae.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: chrysophyte
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

total chrysophyte scales
type: Concept
definition: the total count of siliceous scales (produced by vegetative planktonic cells) of chrysophyte algae.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: chrysophyte
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

cladoceran
type: Concept
definition: an identifiable organism commonly known as a water flea that belongs to the kingdom Animalia, phylum Arthropoda, class Branchiopoda, order Cladocera.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: organism
narrower: cladoceran index
narrower: identified cladoceran
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

total ephippia
type: Concept
definition: the total count of eggs of cladocerans in a sample.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: cladoceran index
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

sponge
type: Concept
definition: an identifiable organism that belongs to the kingdom Animalia, phylum Porifera.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: organism
narrower: identified sponge
narrower: sponge index
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

total sponge spicules
type: Concept
definition: the total count of spicules, structural elements of sponges.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: sponge index
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

phytoliths
type: Concept
definition: a bulk biological material that consists of any element, such as calcium or silica, deposited within various structures and tissues of plants (Credit: Smol et al. 2001 Tracking Environmental Change Using Lake Sediments).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: bulk biological material
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

total species
type: Concept
definition: a diversity index that is a count of the total number of species in a sample.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: diversity index
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

potassium feldspar
type: Concept
definition: alkali feldspar minerals of the chemical composition KAlSi3O8 but with varying crystal structures.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: alkali feldspar series
narrower: microcline
narrower: orthoclase
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

transmittance
type: Concept
definition: an electromagnetic property that measures the amount of light transmitted by a material.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: electromagnetic property
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

range upper bound
type: Concept
definition: the maximum value from which the range is calculated.
alternative label: maximum
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: range
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

range lower bound
type: Concept
definition: the minimum value from which the range is calculated.
alternative label: minimum
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: range
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

whitened
type: Concept
definition: a data transformation that involves processing data to make it behave statistically like white noise.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: detail
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

compositing method
type: Concept
definition: a statistical analysis method that combines multiple time series into one, for example by normalizing each and taking a simple average.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: statistical analysis method
narrower: composite plus regression
narrower: composite plus scale
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

composite plus scale
type: Concept
definition: a compositing method of combining multiple proxy records into one by first standardizing each, next averaging all, and last centering and scaling the resultant time series to match the variance of a target calibration time series.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: compositing method
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

composite plus regression
type: Concept
definition: a compositing method that combines multiple proxy records into one by first standardizing each, next averaging all, and last using regression to calibrate the composite time series to a calibration time series.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: compositing method
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

artificial neural network
type: Concept
definition: a statistical analysis method that uses an iterative learning or training process to model the relationship between predictor and predictand variables while minimizing error. The goal of this method is to identify and represent complex and often nonlinear relationships directly from the data being modeled.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: statistical analysis method
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

Isidella sp.
type: Concept
definition: any coral that belongs to the genus Isidella.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: coral
related: corals and sclerosponges
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

Isopora sp.
type: Concept
definition: any coral that belongs to the genus Isopora.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: coral
related: corals and sclerosponges
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

laser ablation
type: Concept
definition: a sampling method in which material is removed from a specimen by illuminating it with a laser beam (Credit: Chemical Methods Ontology).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: sampling method
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

yttrium/calcium
type: Concept
definition: the elemental ratio of yttrium to calcium.
alternative label: Y/Ca
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or compound ratio
related: corals and sclerosponges
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

tissue
type: Concept
definition: a biological material that consists of an ensemble of similar cells from the same origin that together carry out a similar function.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: biological material
narrower: wood
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

bulk biological material
type: Concept
definition: a biological material that consists of undifferentiated components, often from different sources.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: biological material
narrower: black carbon
narrower: charcoal
narrower: organic matter
narrower: peat
narrower: phytoliths
narrower: pollen
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

bulk biological material
type: Concept
definition: a biological material that consists of undifferentiated components, often from different sources.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: biological material
narrower: organic matter
narrower: peat
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

tissue
type: Concept
definition: a biological material that consists of an ensemble of similar cells from the same origin that together carry out a similar function.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: biological material
narrower: wood
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

dinosterol
type: Concept
definition: a sterol that has the chemical formula C30H52O and that is synthesized by several genera of dinoflagellates.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: sterol
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

physical measurement
type: Concept
definition: a material used to create a climate reconstruction that is a measurement of a physical characteristic (e.g., electromagnetic property, formation property, other physical property) of a substance.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: reconstruction material
narrower: blue intensity
narrower: extension rate
narrower: growth rate
narrower: luminescence
narrower: ring density
narrower: ring width
narrower: varve thickness
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

extension rate
type: Concept
definition: a physical measurement of the rate of linear growth in corals and related species, usually calculated from the width of an annual growth band.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: physical measurement
related: climate reconstructions
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

luminescence
type: Concept
definition: an electromagnetic property that measures the emission of light by a substance not resulting from heat.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: physical measurement
related: climate reconstructions
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

multiple proxies
type: Concept
definition: a material used to create a climate reconstruction that consists of proxies from more than two proxy data types.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: reconstruction material
related: climate reconstructions
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

growth rate
type: Concept
definition: a physical measurement of the rate of linear growth of a deposit (e.g., speleothem, mollusk shell), sometimes calculated from the width of an annual growth band.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: physical measurement
related: climate reconstructions
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

ring width
type: Concept
definition: a physical measurement of the width of all or of some subcomponent of one annual ring from a tree.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: physical measurement
related: climate reconstructions
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

delta 13C
type: Concept
definition: the ratio of two isotopes of carbon, 13C/12C, in a sample compared to that of a standard, typically the Pee Dee Belemnite, as in: ((13C/12C sample)/(13C/12C standard) - 1) x 1000.
alternative label: d13C
alternative label: delta C13
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: isotope ratio
related: climate reconstructions
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

ring density
type: Concept
definition: a physical measurement of the density of all or of some subcomponent of wood within one annual ring from a tree.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: physical measurement
related: climate reconstructions
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

delta 15N excess
type: Concept
definition: a measure of the deviation of a delta 15N value from the value calculated from delta 40Ar measured on the same sample assuming that differences between the two isotopic ratios are caused only by differences in gravitational settling, that is delta 15N - delta 40Ar/4. This quantity is used to reconstruct temperature.
alternative label: d15N excess
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: isotope ratio
related: climate reconstructions
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

varve thickness
type: Concept
definition: a physical measurement of the thickness of a sublayer of or an entire annually-resolved varve in a sediment sequence.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: physical measurement
related: climate reconstructions
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

diatom assemblage
type: Concept
definition: an assemblage of unicellular phytoplankton that belong to the kingdom Chromista, phylum Ochrophyta, class Bacillariophyceae.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: biological assemblage
related: climate reconstructions
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

midge assemblage
type: Concept
definition: an assemblage of organisms that belong to one of several families in the kingdom Animalia, phylum Arthropoda, class Insecta, order Diptera.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: biological assemblage
related: climate reconstructions
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

foraminifer assemblage
type: Concept
definition: an assemblage of organisms that belong to the kingdom Protozoa, order Foraminiferida.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: biological assemblage
related: climate reconstructions
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

radiolarian assemblage
type: Concept
definition: an assemblage of organisms that belong to the kingdom Protozoa, order Radiolaria.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: biological assemblage
related: climate reconstructions
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

delta 18O
type: Concept
definition: the ratio of two isotopes of oxygen, 18O/16O, in a sample compared to that of a standard, typically either Pee Dee Belemnite or standard mean ocean water, as in: ((18O/16O sample)/(18O/16O standard) - 1) x 1000.
alternative label: d18O
alternative label: delta O18
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: isotope ratio
related: climate reconstructions
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

loess and paleosol
type: Concept
definition: a data type that includes measurements made on silt-sized material that is deposited on the land surface by winds.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: data type
related: C16 n-alkanoic acid
related: C17 n-alkanoic acid
related: C18 n-alkanoic acid
related: C19 n-alkanoic acid
related: C20 n-alkanoic acid
related: C21 n-alkanoic acid
related: C22 n-alkanoic acid
related: C23 n-alkanoic acid
related: C24 n-alkanoic acid
related: C25 n-alkanoic acid
related: C26 n-alkanoic acid
related: C27 n-alkanoic acid
related: C28 n-alkanoic acid
related: C29 n-alkanoic acid
related: C30 n-alkanoic acid
related: C31 n-alkanoic acid
related: C32 n-alkanoic acid
related: C33 n-alkanoic acid
related: C34 n-alkanoic acid
related: International Geo Sample Number
related: accumulation rate
related: age
related: age at sample end
related: age at sample start
related: anhysteretic remanent magnetization/isothermal remanent magnetization
related: anhysteretic remanent magnetization/magnetic susceptibility
related: anhysteretic remanent magnetization/saturation isothermal remanent magnetization
related: blue-yellow contrast
related: branched glycerol dialkyl glycerol tetraether
related: calcium carbonate
related: carbon
related: carbon/nitrogen
related: clay
related: coercivity
related: coercivity of remanence
related: collection date
related: collection elevation
related: delta 13C
related: delta 18O
related: delta 2H
related: density
related: depth
related: depth at sample end
related: depth at sample start
related: dry sediment
related: fatty acid
related: gastropod
related: glycerol dialkyl glycerol tetraether
related: grain size class
related: grain size kurtosis
related: grain size mean
related: grain size median
related: grain size skewness
related: grain size standard deviation
related: granule
related: identified gastropod
related: illite
related: initial magnetization slope
related: inorganic carbon
related: iron(III) oxide
related: isoprenoid glycerol dialkyl glycerol tetraether
related: latitude
related: lightness
related: loess
related: longitude
related: magnetic susceptibility
related: mass magnetic susceptibility
related: maximum angular deviation
related: mineral matter
related: n-alkanoic acid
related: nitrogen
related: notes
related: number of samples
related: organic carbon
created: 2018-03-26 00:00:00.0
modified: 2021-02-03 11:07:28.0

delta 29Si
type: Concept
definition: the ratio of two isotopes of silicon, 29Si/28Si, in a sample compared to that of a standard, typically NBS 28, as in: ((29Si/28Si sample)/(29Si/28Si standard) - 1) x 1000.
alternative label: d29Si
alternative label: delta Si29
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: isotope ratio
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

saturation isothermal remanent magnetization/magnetic susceptibility
type: Concept
definition: a magnetic ratio of the saturation isothermal remanent magnetization to the magnetic susceptibility, which can yield a qualitative measure of magnetic grain size if the magnetic mineralogy is dominantly magnetite.
alternative label: SIRM/K
alternative label: SIRM/MS
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: magnetic ratios
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

median destructive field
type: Concept
definition: a magnetic field property that is the peak alternating field strength at which 50% of a remanent magnetization is demagnetized (Credit: Encyclopedia of Geomagnetism and Paleomagnetism).
alternative label: MDF
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: magnetic field properties
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

count per microgram
type: Concept
definition: a count per mass unit that applies to one microgram, or 10^[-6] grams.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: count per mass unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

nanomole per square centimeter per kiloyear
type: Concept
definition: a mole per area per time unit that is one billionth of a mole, or 10^[-9] mole, per one ten-thousandth of a square meter, or 10^[-4] m, per one thousand years.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: mole per area per time unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

calcium/strontium
type: Concept
definition: the elemental ratio of calcium to strontium.
alternative label: Ca/Sr
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or compound ratio
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

silicon/aluminum
type: Concept
definition: the elemental ratio of silicon to aluminum.
alternative label: Si/Al
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or compound ratio
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

silicon/strontium
type: Concept
definition: the elemental ratio of silicon to strontium.
alternative label: Si/Sr
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or compound ratio
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

titanium/aluminum
type: Concept
definition: the elemental ratio of titanium to aluminum.
alternative label: Ti/Al
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or compound ratio
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

thorium/uranium
type: Concept
definition: the elemental ratio of thorium to uranium.
alternative label: Th/U
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or compound ratio
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

zirconium/aluminum
type: Concept
definition: the elemental ratio of zirconium to aluminum.
alternative label: Zr/Al
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or compound ratio
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

zirconium/strontium
type: Concept
definition: the elemental ratio of zirconium to strontium.
alternative label: Zr/Sr
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or compound ratio
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

phytol
type: Concept
definition: an alcohol with the formula C20H40O.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: alcohol
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

sterol
type: Concept
definition: an organic hydroxy compound that has a hydroxyl group at the 3-position of the A-ring.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: organic hydroxy compound
narrower: brassicasterol
narrower: cholestanol
narrower: cholesterol
narrower: coprostanol
narrower: dinosterol
narrower: epicoprostanol
narrower: sitosterol
narrower: stigmastanol
narrower: taraxerol
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

calcareous nannofossil
type: Concept
definition: remains of coccolithophores or their likely relatives consisting primarily of coccoliths but additionally small calcite nannoliths of uncertain origin.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: coccolithophore
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

alkenone
type: Concept
definition: a ketone that is a long-chain unsaturated methyl and ethyl n-ketone produced by a few phytoplankton species of the class Prymnesiophyceae (Credit: Wikipedia).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: ketone
narrower: C37 alkenone
narrower: C38 alkenone
related: climate reconstructions
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

Clathromorphum nereostratum
type: Concept
definition: a particular species of the genus Clathromorphum.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: Clathromorphum sp.
related: corals and sclerosponges
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

agglutinated foraminifer
type: Concept
definition: a benthic foraminifer whose test, or shell, consists of foreign particles from the environment cemented together.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: benthic foraminifer
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

calcareous benthic foraminifer
type: Concept
definition: a benthic foraminifer that secretes a rigid calcite or aragonite test, or shell.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: benthic foraminifer
narrower: Cibicides sp.
narrower: Cibicidoides sp.
narrower: Melonis sp.
narrower: Nuttallides sp.
narrower: Oridorsalis sp.
narrower: Planulina sp.
narrower: Uvigerina sp.
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

fatty acid
type: Concept
definition: an organooxygen compound with the general formula CHO2R where R is a long aliphatic chain (i.e., lacking an especially stable ring of atoms).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: lipid
narrower: n-alkanoic acid
narrower: palmitic acid
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

ensemble member
type: Concept
definition: one of a series of realizations that are all equally probable and that together specify the likeliness of certain values being the true value.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: error
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

Bayesian hierarchical modeling
type: Concept
definition: a Bayesian inference method that uses a model written in multiple levels (hierarchical form) that estimates the parameters of the posterior distribution using the Bayesian method (Credit: Wikipedia).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: Bayesian inference
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

analogue method
type: Concept
definition: a statistical analysis method that uses a dissimilarity measure between a sample and a set of standards to identify the environmental conditions likely present at the time of the sample.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: statistical analysis method
narrower: modern analogue technique
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

incoherent:coherent scattering
type: Concept
definition: a ratio of scattering in x-ray fluorescence analysis, that can be used as a proxy for the amount of organic matter in a sample.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: scattering
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

Clathromorphum sp.
type: Concept
definition: any coralline algae that belongs to the genus Clathromorphum.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: coralline algae
narrower: Clathromorphum compactum
narrower: Clathromorphum nereostratum
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

gastropod index
type: Concept
definition: a measurement of gastropods, such as a ratio or count, that is derived from a series of observations and that is used as an indicator or measure.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: gastropod
narrower: total gastropods
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

midge index
type: Concept
definition: a measurement of organisms belonging to several families of the Order Diptera, such as a ratio or count, that is derived from a series of observations and that is used as an indicator or measure.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: insect index
narrower: total head capsules
related: insect
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

ostracod index
type: Concept
definition: a measurement of ostracods, such as a ratio or count, that is derived from a series of observations and that is used as an indicator or measure.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: ostracod
narrower: total ostracods
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

sponge index
type: Concept
definition: a measurement of sponges, such as a ratio or count, that is derived from a series of observations and that is used as an indicator or measure.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: sponge
narrower: total sponge spicules
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

cladoceran index
type: Concept
definition: a measurement of cladocerans, such as a ratio or count, that is derived from a series of observations and that is used as an indicator or measure.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: cladoceran
narrower: total ephippia
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

testate amoeba index
type: Concept
definition: a measurement of testate amoebae, such as a ratio or count, that is derived from a series of observations and that is used as an indicator or measure.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: testate amoeba
narrower: total testate amoebae
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

provenance
type: Concept
definition: a formation property that describes or quantifies the location or nature of sediment source areas.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: formation property
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

P-wave velocity
type: Concept
definition: a wave property that is a measure of the rate of movement of a compressional (P) wave.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: wave property
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

P-wave amplitude
type: Concept
definition: a wave property that is a measure of the magnitude of a compressional (P) wave.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: wave property
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

wave property
type: Concept
definition: a physical property relating to the characteristics of waves.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: physical property
narrower: P-wave amplitude
narrower: P-wave velocity
narrower: wavelength
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

communality
type: Concept
definition: a goodness-of-fit measure that quantifies the proportion of a variable's total variance that is accounted for by certain factors or principal components.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: goodness-of-fit measure
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

collection water depth
type: Concept
definition: sampling metadata that identifies the depth of water above the sampling site.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: sampling metadata
related: corals and sclerosponges
related: fire history
related: historical
related: instrumental
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

land temperature
type: Concept
definition: the mean temperature at or below the land surface.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: temperature
narrower: land surface temperature
related: climate reconstructions
related: instrumental
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

sea water temperature
type: Concept
definition: the mean temperature at or below the surface of the ocean.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: temperature
narrower: sea surface temperature
related: climate reconstructions
related: instrumental
related: paleoceanography
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

ice temperature
type: Concept
definition: the mean temperature at or below the surface of an ice sheet or glacier.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: temperature
related: climate reconstructions
related: ice cores
related: instrumental
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

lake water temperature
type: Concept
definition: the mean temperature at or below the surface of a lake.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: temperature
narrower: lake surface temperature
related: climate reconstructions
related: instrumental
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

radiative flux variable
type: Concept
definition: an energy flux variable that is a measurement of fluxes of radiation within the Earth's atmosphere, at any levels ranging from the top of the atmosphere to the Earth surface.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: energy flux variable
narrower: aerosol optical depth
narrower: effective aerosol radius
narrower: longwave cloud radiative effect
narrower: photosynthetically active radiation
narrower: planetary albedo
narrower: shortwave cloud radiative effect
narrower: surface downwelling clear-sky longwave radiation
narrower: surface downwelling clear-sky shortwave radiation
narrower: surface downwelling longwave radiation
narrower: surface downwelling shortwave radiation
narrower: surface net downward clear-sky longwave radiation
narrower: surface net downward clear-sky shortwave radiation
narrower: surface net downward longwave radiation
narrower: surface net downward radiation
narrower: surface net downward shortwave radiation
narrower: surface net upward clear-sky longwave radiation
narrower: surface net upward longwave radiation
narrower: surface upwelling clear-sky longwave radiation
narrower: surface upwelling clear-sky shortwave radiation
narrower: surface upwelling longwave radiation
narrower: surface upwelling shortwave radiation
narrower: top-of-atmosphere net downward clear-sky longwave radiation
narrower: top-of-atmosphere net downward clear-sky shortwave radiation
narrower: top-of-atmosphere net downward longwave radiation
narrower: top-of-atmosphere net downward radiation
narrower: top-of-atmosphere net downward shortwave radiation
narrower: top-of-atmosphere net upward clear-sky longwave radiation
narrower: top-of-atmosphere net upward longwave radiation
narrower: top-of-atmosphere net upward shortwave radiation
narrower: top-of-atmosphere outgoing clear-sky longwave radiation
narrower: top-of-atmosphere outgoing clear-sky shortwave radiation
narrower: top-of-atmosphere outgoing longwave radiation
narrower: top-of-atmosphere outgoing shortwave radiation
related: climate reconstructions
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

insolation
type: Concept
definition: a forcing variable that is a measurement of incoming solar radiation at the top of the atmosphere. This quantity varies latitudinally and seasonally.
alternative label: top-of-atmosphere downwelling shortwave radiation
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: forcing variable
related: climate forcing
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

moisture index
type: Concept
definition: a hydroclimate index that describes conditions on a scale ranging from 'wetter' to 'drier.'
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: hydroclimate index
narrower: monsoon index
related: climate reconstructions
related: historical
related: tree ring
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

testate amoebae assemblage
type: Concept
definition: an assemblage of organisms that are an ameboid protist with a test and that belong to the kingdom Protozoa.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: biological assemblage
related: climate reconstructions
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

cross-validation reduction of error
type: Concept
definition: a coefficient of determination that quantifies whether a statistical or physically-based model is a better predictor of observed values than the mean climatology of the calibration period and that is calculated as: 1 - (sum((observed-predicted)^2)/n)/(sum((observed-calibration climatology)^2)/n), where each of the n data points is used to both train (calibrate) and test (validate) the model but never at the same time and the the measure is an average of the reduction of error over the n trials.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: coefficient of determination
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

t-statistic
type: Concept
definition: a hypothesis testing variable that is the ratio of the departure of the estimated value of a parameter from its hypothesized value relative to its standard error.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: hypothesis testing variable
related: climate reconstructions
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

coccolithophore index
type: Concept
definition: a measurement of coccolithophores, such as a ratio or count, that is derived from a series of observations and that is used as an indicator or measure.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: coccolithophore
narrower: total calcareous nannofossils
narrower: total coccoliths
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

diatom index
type: Concept
definition: a measurement of diatoms, such as a ratio or count, that is derived from a series of observations and that is used as an indicator or measure.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: diatom
narrower: diatom habitat-based index
narrower: diatom morphology-based index
narrower: diatom ratio
narrower: diatom tolerance-based index
narrower: total diatoms
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

bulk geological material
type: Concept
definition: a geological material that consists of undifferentiated components, often from different sources.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: geological material
narrower: dust
narrower: mineral matter
narrower: particles
narrower: rock
narrower: sediment
narrower: soil
created: 2018-03-26 00:00:00.0
modified: 2021-11-14 12:13:15.0

identified mineral
type: Concept
definition: a geological material that has been identified based on composition and crystal structure as a specific mineral or as belonging to a certain mineral class.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: geological material
narrower: barite
narrower: carbonate
narrower: gypsum
narrower: oxide and hydroxide minerals
narrower: quartz
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

saturation isothermal magnetization
type: Concept
definition: the saturation magnetization under constant temperature conditions.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: saturation magnetization
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

calcium/potassium
type: Concept
definition: the elemental ratio of calcium to potassium.
alternative label: Ca/K
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or compound ratio
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

chlorine/potassium
type: Concept
definition: the elemental ratio of chlorine to potassium.
alternative label: Cl/K
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or compound ratio
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

iron/potassium
type: Concept
definition: the elemental ratio of iron to potassium.
alternative label: Fe/K
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or compound ratio
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

silicon/potassium
type: Concept
definition: the elemental ratio of silicon to potassium.
alternative label: Si/K
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or compound ratio
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

strontium/potassium
type: Concept
definition: the elemental ratio of strontium to potassium.
alternative label: Sr/K
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or compound ratio
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

sulfur/potassium
type: Concept
definition: the elemental ratio of sulfur to potassium.
alternative label: S/K
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or compound ratio
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

titanium/potassium
type: Concept
definition: the elemental ratio of titanium to potassium.
alternative label: Ti/K
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or compound ratio
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

technetium
type: Concept
definition: a chemical element with atomic number 43.
alternative label: Tc
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or single-element molecule
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

kelvin per century
type: Concept
definition: a temperature per time unit that is the change of one degree kelvin per one hundred years.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: temperature per time unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

tree demographic and injury and fire event code
type: Concept
definition: an event layer that relates to tree growth, tree injury, or wildfire.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: event layer
related: fire history
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

tree demographic and fire event code
type: Concept
definition: an event layer that relates to tree growth or wildfires.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: event layer
related: fire history
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

ampere per meter per kilogram
type: Concept
definition: a magnetic field strength unit that is per unit mass of one kilogram.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: magnetic field strength unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

count per gram
type: Concept
definition: a count per mass unit that applies to one gram.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: count per mass unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

cubic centimeter per square centimeter per kiloyear
type: Concept
definition: a volume per area per time unit that is one millionth of a mole, or 10^[-6] m3, per one ten-thousandth of a square meter, or 10^[-4] m, per one thousand years.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: volume per area per time unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

cubic centimeter per gram
type: Concept
definition: a specific volume unit which is equal to a thousandth of a cubic meter per kilogram or 10^[-3] m^[3]/kg.
alternative label: cm3/g
alternative label: cubic centimetre per gram
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: specific volume unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

milligram per square meter per year
type: Concept
definition: a mass per area per time unit that is one thousandth of a gram, or 10^[-3] g, per one square meter, per one year.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: mass per area per time unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

acre foot
type: Concept
definition: a volume unit that is one acre of surface area to a depth of one foot. This is approximately 1233 cubic meters.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: volume unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

count per milliliter
type: Concept
definition: a count per volume unit that applies to one milliliter, or 10^[-3] liters.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: count per volume unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

square kilometer
type: Concept
definition: an area unit which is equal to one million square meters or 10^[6] m^[2].
alternative label: km2
alternative label: square kilometre
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: area unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

cubic meter
type: Concept
definition: a volume unit which is equal to the volume of a cube with edges one meter in length. One cubic meter equals to 1000 liters (Credit: Units of measurement ontology).
alternative label: cubic metre
alternative label: m3
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: volume unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

cubic meter per second
type: Concept
definition: a volume per time unit that is one cubic meter per one second.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: volume per time unit
narrower: sverdrup
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

count per square centimeter per second
type: Concept
definition: a count per area per time unit that is a simple count of a substance per one ten-thousandth of a square meter, or 10^[-4] m2, and per one second.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: count per area per time unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

count per square meter per second
type: Concept
definition: a count per area per time unit that is a simple count of a substance per one square meter and per one second.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: count per area per time unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

square centimeter per milliliter
type: Concept
definition: a volume area unit that is one ten-thousandth of a square meter, or 10^[-4] m2, per one thousandth of a liter, or 10^[-3] L.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: volume area unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

cubic centimeter per kilogram
type: Concept
definition: a specific volume unit which is equal to a millionth of a cubic meter per kilogram or 10^[-6] m^[3]/kg.
alternative label: cm3/kg
alternative label: cubic centimetre per kilogram
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: specific volume unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

cubic centimeter per liter
type: Concept
definition: a volume fraction unit that measures the number of cubic centimeters of one subcomponent of a sample relative to one liter of either another subcomponent or of the entire sample.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: volume fraction unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

count per kilogram per hour
type: Concept
definition: a count per mass per time unit that is a simple count of a substance per kilogram of sample per hour.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: count per mass per time unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

count per square centimeter
type: Concept
definition: a count per area unit that applies to an area of one square centimeter, or 10^[-4] square meters.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: count per area unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

count per cubic centimeter
type: Concept
definition: a count per volume unit that applies to one cubic centimeter, or 10^[-6] cubic meters.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: count per volume unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

count per kilogram
type: Concept
definition: a count per mass unit that applies to one kilogram.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: count per mass unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

count per liter
type: Concept
definition: a count per volume unit that applies to one liter.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: count per volume unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

count per minute
type: Concept
definition: a count per time unit that is a simple count of the occurrence of a substance per one one minute.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: count per time unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

disintegration per minute per kilogram
type: Concept
definition: a specific activity unit which is equal to the activity of a kilogram of radioactive material in which one nucleus decays per minute or there is one atom disintegration per minute.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: specific activity unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

fraction
type: Concept
definition: a dimensionless unit that relates the part (the numerator) to the whole (the denominator) and that, by definition, ranges from 0 to 1 (Credit: Units of measurement ontology).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: dimensionless
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

cubic foot per second
type: Concept
definition: a volume per time unit that is a cubic foot, or approximately 0.283 cubic meters, per one second.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: volume per time unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

gram per decimeter
type: Concept
definition: a linear density unit which is equal to the mass of an object in grams per one decimeter, or 10^[-1] m.
alternative label: g/dm
alternative label: gram per decimetre
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: linear density unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

gram per liter
type: Concept
definition: a mass density unit which is equal to mass of an object in grams divided by the volume in liters (Credit: Units of measurement ontology).
alternative label: g/L
alternative label: gram per litre
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: mass density unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

gigaton per year
type: Concept
definition: a mass per time unit that is one billion tons, or 10^[9] tons, per one year.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: mass per time unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

pressure unit
type: Concept
definition: a unit which is a standard measure of the force applied to a given area, with SI units being pascals (Credit: Units of measurement ontology).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: unit
narrower: atmosphere
narrower: hectopascal
narrower: microatmosphere
narrower: pascal
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

hectopascal
type: Concept
definition: a pressure unit which is equal to one hundred pascals, or 10^[-2] Pa.
alternative label: hPa
alternative label: mbar
alternative label: millibar
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: pressure unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

inch
type: Concept
definition: a length unit that is equal to 2.54 centimeters.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: length unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

kelvin day
type: Concept
definition: a temperature unit for accumulated temperature.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: temperature unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

kilogram per square meter per year
type: Concept
definition: a mass per area per time unit that is one kilogram per one square meter, per one year.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: mass per area per time unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

kilogram per square kilometer
type: Concept
definition: an area density unit which is equal to the mass of an object in kilograms per square kilometer, or 10^[6] m^[2].
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: area density unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

kilogram per cubic meter
type: Concept
definition: a mass density unit which is equal to mass of an object in kilograms divided by the volume in cubic meters (Credit: Units of measurement ontology).
alternative label: kg/m3
alternative label: kilogram per cubic metre
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: mass density unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

cubic kilometer
type: Concept
definition: a volume unit which is equal to one billion cubic meters or 10^[9] m^[3].
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: volume unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

meter per kiloyear
type: Concept
definition: a length per time unit that is one meter per one thousand years, or 10^[3] years.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: length per time unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

meter per year
type: Concept
definition: a length per time unit that is one meter per one year.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: length per time unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

cubic meter per year
type: Concept
definition: a volume per time unit that is one cubic meter per one year.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: volume per time unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

milliampere square meter per kilogram
type: Concept
definition: a magnetic moment unit that is one thousandth of an ampere square meter, or 10^[-3] Am2, per unit mass in kilograms.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: magnetic moment unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

milligram per liter
type: Concept
definition: a mass density unit which is equal to mass of an object in milligrams, or 10^[-3] g, divided by the volume in liters (Credit: Units of measurement ontology).
alternative label: mg/L
alternative label: milligram per litre
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: mass density unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

milligram per cubic meter
type: Concept
definition: a mass density unit which is equal to mass of an object in milligrams, or 10^[-3] g, divided by the volume in cubic meters.
alternative label: mg/m3
alternative label: milligram per cubic metre
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: mass density unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

milliliter per gram
type: Concept
definition: a specific volume unit which is equal to one liter volume occupied by one kilogram of a particular substance.
alternative label: millilitre per gram
alternative label: ml/g
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: specific volume unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

milliliter per kilogram
type: Concept
definition: a specific volume unit which is equal to a thousandth of a liter per kilogram or 10^[-3] l/kg (Credit: Units of measurement ontology).
alternative label: millilitre per kilogram
alternative label: ml/kg
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: specific volume unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

millimeter per day
type: Concept
definition: a length per time unit that is one thousandth of a meter, or 10^[-3] m, per one day.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: length per time unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

millimeter per month
type: Concept
definition: a length per time unit that is one thousandth of a meter, or 10^[-3] m, per one month.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: length per time unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

millimeter per year
type: Concept
definition: a length per time unit that is one thousandth of a meter, or 10^[-3] m, per one year.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: length per time unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

square millimeter per square centimeter per year
type: Concept
definition: an area per area per time unit that is one millionth of a square meter, or 10^[-6] m2, per one ten-thousandth of a square meter, or 10^[-4] m2, per year.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: area per area per time unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

square millimeter per milliliter
type: Concept
definition: a volume area unit that is one millionth of a square meter, or 10^[-6] m2, per one thousandth of a liter, or 10^[-3] L.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: volume area unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

mole per mole
type: Concept
definition: a mole fraction unit that measures the number of moles of one subcomponent of a sample relative to one mole of either another subcomponent or of the entire sample.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: mole fraction unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

molecule per gram
type: Concept
definition: a molality unit which expresses a concentration of a solution of one molecule per one thousandth of a kilogram, or 10^[-3] kg, of solvent.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: molality unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

megaton
type: Concept
definition: a mass unit which is equal to one billion kilograms or 10^[9] kg.
alternative label: Mt
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: mass unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

nanoampere
type: Concept
definition: an electric current unit which is equal to one billionth of an ampere or 10^[-9] A.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: electric current unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

nanogram per square centimeter per year
type: Concept
definition: a mass per area per time unit that is one billionth of a gram, or 10^[-9] g, per one ten-thousandth of a square meter, or 10^[-4] m^[2], per one year.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: mass per area per time unit
created: 2018-03-26 00:00:00.0
modified: 2020-08-24 12:30:50.0

nanogram per liter
type: Concept
definition: a mass density unit which is equal to mass of an object in nanograms, or 10^[-9] g, divided by the volume in liters.
alternative label: nanogram per litre
alternative label: ng/L
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: mass density unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

nanomole per cubic meter
type: Concept
definition: a molarity unit which expresses a concentration of a solution of one billionth of a mole, or 10^[-9] mole, per one cubic meter of solvent.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: molarity unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

nanomole per mole
type: Concept
definition: a mole fraction unit that measures the number of nanomoles, or 10^[-9] mole, of one subcomponent of a sample relative to one mole of either another subcomponent or of the entire sample.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: mole fraction unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

nanosiemens
type: Concept
definition: an electrical conduction unit which is equal to one billionth of a siemens, or 10^[-9] siemens.
alternative label: nS
alternative label: nmho
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: electrical conduction unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

siemens
type: Concept
definition: an electrical conduction unit which is equal to ampere/volt (Credit: Units of measurement ontology).
alternative label: S
alternative label: mho
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: electrical conduction unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

parts per quadrillion
type: Concept
definition: a parts per notation unit which denotes the amount of a given substance in a total amount of 1,000,000,000,000 regardless of the units of measure used as long as they are the same or 1 part in 10^[15] (Credit: Units of measurement ontology).
alternative label: ppq
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: parts per notation unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

picoCurie per kilogram
type: Concept
definition: a specific activity unit which is equal to 3.7 x 10^[-2] atom disintegrations per second in a mass of one kilogram.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: specific activity unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

per meg AIR
type: Concept
definition: a parts per million unit calculated using the isotopic concentration of standard air.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: parts per million
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

picogram per square centimeter per year
type: Concept
definition: a mass per area per time unit that is one trillionth of a gram, or 10^[-12] g, per one ten-thousandth of a square meter, or 10^[-4] m^[2], per one year.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: mass per area per time unit
created: 2018-03-26 00:00:00.0
modified: 2020-08-24 12:30:23.0

picogram per liter
type: Concept
definition: a mass density unit which is equal to mass of an object in picograms, or 10^[-12] g, divided by the volume in liters.
alternative label: pg/L
alternative label: picogram per litre
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: mass density unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

siemens per meter
type: Concept
definition: an electrical conductivity unit that is the electrical current strength between two electrodes with an applied constant voltage placed in a solution a specified distance apart.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: electrical conductivity unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

teragram
type: Concept
definition: a mass unit which is equal to one trillion grams or 10^[12] g.
alternative label: Tg
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: mass unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

teramole
type: Concept
definition: a substance unit equal to one trillion moles or 10^[12] mol.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: substance unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

tritium unit
type: Concept
definition: a relative unit that is the ratio of 1 tritium atom to 1018 hydrogen atoms.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: relative unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

microampere
type: Concept
definition: an electric current unit which is equal to one millionth of an ampere or 10^[-6] A.
alternative label: uA
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: electric current unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

microequivalent per kilogram
type: Concept
definition: an equivalent per mass unit that is one millionth of an equivalent, or 10^[-6] equivalents, per kilogram.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: equivalent per mass unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

microequivalent per liter
type: Concept
definition: an equivalent per mass unit that is one millionth of an equivalent, or 10^[-6] equivalents, per liter.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: equivalent per volume unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

microgram per kilogram
type: Concept
definition: a mass fraction unit that measures the number of micrograms, or 10^[-9] kilograms, of one subcomponent of a sample relative to one kilogram of either another subcomponent or of the entire sample.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: mass fraction unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

microgram per liter
type: Concept
definition: a mass density unit which is equal to mass of an object in micrograms, or 10^[-6] g, divided by the volume in liters (Credit: Units of measurement ontology).
alternative label: microgram per litre
alternative label: ug/L
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: mass density unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

micrometer per year
type: Concept
definition: a length per time unit that is one millionth of a meter, or 10^[-6] m, per one year.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: length per time unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

square micrometer per square centimeter per year
type: Concept
definition: an area per area per time unit that is one trillionth of a square meter, or 10^[-12] m2, per one ten-thousandth of a square meter, or 10^[-4] m2, per year.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: area per area per time unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

square micrometer per milliliter
type: Concept
definition: a volume area unit that is one trillionth of a square meter, or 10^[-12] m2, per one thousandth of a liter, or 10^[-3] L.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: volume area unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

micromole per kilogram
type: Concept
definition: a molality unit which expresses a concentration of a solution of one millionth of a mole, or 10^[-6] mole, per kilogram of solvent.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: molality unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

micromole per liter
type: Concept
definition: a molarity unit which expresses a concentration of a solution of one millionth of a mole, or 10^[-6] mole, per one liter of solvent.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: molarity unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

year per centimeter
type: Concept
definition: a reciprocal length per time unit that is one year per one hundredth of a meter, or 10^[-2] m.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: length per time unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

microsiemens per meter
type: Concept
definition: an electrical conductivity unit that is one millionth of a siemen, or 10^[-6] S, per meter.
alternative label: micromho per meter
alternative label: uS/m
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: electrical conductivity unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

volt
type: Concept
definition: an electric potential difference unit which is equal to the work per unit charge. One volt is the potential difference required to move one coulomb of charge between two points in a circuit while using one joule of energy (Credit: Units of measurement ontology).
alternative label: V
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: electric potential difference unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

International Geo Sample Number
type: Concept
definition: a sample identification that is an alphanumeric code generated by the System for Earth Science Registration for a physical sample.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: sample identification
related: borehole
related: climate forcing
related: climate reconstructions
related: corals and sclerosponges
related: fire history
related: historical
related: ice cores
related: instrumental
related: loess and paleosol
related: paleoceanography
related: paleolimnology
related: speleothems
related: tree ring
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

practical salinity unit
type: Concept
definition: a relative unit for the salinity of water that is defined in terms of the ratio of the electrical conductivity of a water sample at 15 degrees Celsius and the pressure of one standard atmosphere, to that of a solution of 32.4356 grams of potassium chloride (KCl) in 1 kilogram of water at the same temperature and pressure. By definition, a ratio that is exactly equal to one corresponds to a practical salinity of 35.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: relative unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

nanogram per gram
type: Concept
definition: a mass fraction unit that measures the number of nanograms, or 10^[-9] g, of one subcomponent of a sample relative to one gram of either another subcomponent or of the entire sample.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: mass fraction unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

picogram per gram
type: Concept
definition: a mass fraction unit that measures the number of picograms, or 10^[-12] g, of one subcomponent of a sample relative to one gram of either another subcomponent or of the entire sample.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: mass fraction unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

calendar kiloyear
type: Concept
definition: a duration unit of 10^[3] years, calibrated to actual years if derived from radiocarbon dating.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: duration unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

calendar year
type: Concept
definition: a duration unit of years, calibrated to actual years if derived from radiocarbon dating.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: duration unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

rate unit
type: Concept
definition: a unit which represents a standard measurement occurrence of a process per unit time (Credit: Units of measurement ontology).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: unit
narrower: area per area per time unit
narrower: concentration per time unit
narrower: count per area per time unit
narrower: count per mass per time unit
narrower: count per time unit
narrower: dimensionless per time unit
narrower: length per time unit
narrower: mass fraction per area per time unit
narrower: mass per area per time unit
narrower: mass per length per time unit
narrower: mass per time unit
narrower: mass per volume per time unit
narrower: mole per area per time unit
narrower: mole per time unit
narrower: mole per volume per time unit
narrower: pressure per time unit
narrower: salinity per time unit
narrower: temperature per time unit
narrower: volume per area per time unit
narrower: volume per time per length unit
narrower: volume per time unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

concentration unit
type: Concept
definition: a unit which represents a standard measurement of how much of a given substance there is mixed with another substance (Credit: Units of measurement ontology).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: unit
narrower: count per area unit
narrower: count per mass unit
narrower: count per volume unit
narrower: equivalent per mass unit
narrower: equivalent per volume unit
narrower: mass fraction unit
narrower: molality unit
narrower: molarity unit
narrower: mole fraction unit
narrower: mole per area unit
narrower: parts per notation unit
narrower: percent
narrower: volume area unit
narrower: volume fraction unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

proxy composite
type: Concept
definition: a statistical variable that results from compositing multiple, usually normalized, proxy time series.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: statistical variable
narrower: tree ring standardized growth index
related: climate forcing
related: climate reconstructions
related: corals and sclerosponges
related: loess and paleosol
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

ostracod assemblage
type: Concept
definition: an assemblage of organisms that belong to the kingdom Animalia, phylum Arthropoda, class Ostracoda.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: biological assemblage
related: climate reconstructions
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

total dissolved solids
type: Concept
definition: a solution property that is the combined content of all inorganic and organic substances contained in a liquid in molecular, ionized or micro-granular (colloidal sol) suspended form (Credit: Wikipedia).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: solution property
related: climate reconstructions
related: instrumental
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

strontium/calcium
type: Concept
definition: the elemental ratio of strontium to calcium.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or compound ratio
related: climate reconstructions
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

radiocarbon year
type: Concept
definition: an duration unit of years, derived from radiocarbon dating without calibration to actual years.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: duration unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

radiocarbon kiloyear
type: Concept
definition: an duration unit of 10^[3] years, derived from radiocarbon dating without calibration to actual years.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: duration unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

basal area mass increment
type: Concept
definition: the mass of the cross-sectional area of one year of tree growth.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: mass
related: tree ring
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

area
type: Concept
definition: a physical property that is the spatial extent of a two-dimensional figure or shape.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: physical property
narrower: basal area increment
narrower: resin duct area
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

basal area increment
type: Concept
definition: the cross-sectional area of one year of tree growth.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: area
related: tree ring
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

earlywood tracheid diameter
type: Concept
definition: the diameter of tracheid cells in wood that formed in the beginning of the growing season and that tend to be large and thin-walled.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: tracheid diameter
related: tree ring
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

taraxerol
type: Concept
definition: a sterol that has the chemical formula C30H50O.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: sterol
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

cholesterol
type: Concept
definition: a sterol that has the chemical formula C27H46O.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: sterol
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

alkane
type: Concept
definition: a hydrocarbon that is an acyclic and saturated with the general chemical formula CnH(2n+2).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: hydrocarbon
narrower: branched alkane
narrower: cyclic alkane
narrower: n-alkane
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

phenol
type: Concept
definition: an aromatic compound having one or more hydroxyl (OH) groups attached to a carbon atom of an aromatic ring.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: aromatic compound
narrower: lignin
narrower: vanillic acid
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

alkene
type: Concept
definition: a hydrocarbon that is unsaturated with at least one carbon-carbon double bond and the general formula CnH2n.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: hydrocarbon
narrower: botryococcene
narrower: highly-branched isoprenoid alkene
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

aromatic compound
type: Concept
definition: an organic compound that is highly-stable, cyclic, and planar with a ring of resonance bonds.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: organic compound
narrower: phenol
narrower: polycyclic aromatic hydrocarbon
narrower: sedimentary ancient DNA
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

pristane
type: Concept
definition: a branched alkane that has the formula C19H40.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: branched alkane
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

phytane
type: Concept
definition: a branched alkane that has the formula C20H42.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: branched alkane
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

botryococcene
type: Concept
definition: an unbranched isoprenoid triterpene having the formula CnH2n-10 and that is a product of the green algae Botryococcus braunii (Credit: Wikipedia).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: alkene
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

square millimeter
type: Concept
definition: an area unit which is equal to one millionth of a square meter or 10^[-6] m^[2] (Credit: Units of measurement ontology).
alternative label: mm2
alternative label: square millimetre
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: area unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

polycyclic aromatic hydrocarbon
type: Concept
definition: an aromatic compound that is a hydrocarbon and that is composed of multiple aromatic rings and no branching structures.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: aromatic compound
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

unsaturated fatty acid
type: Concept
definition: a fatty acid that contains at least one carbon to carbon double or triple bond.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: fatty acid
related: loess and paleosol
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

saturated fatty acid
type: Concept
definition: a fatty acid that contains no carbon to carbon multiple bonds.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: fatty acid
narrower: n-alkanoic acid
related: loess and paleosol
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

C34 n-alkane
type: Concept
definition: a n-alkane with the chemical formula C34H70.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: n-alkane
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

C35 n-alkane
type: Concept
definition: a n-alkane with the chemical formula C35H72.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: n-alkane
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

C32 n-alkane
type: Concept
definition: a n-alkane with the chemical formula C32H66.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: n-alkane
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

organic compound index
type: Concept
definition: a measurement of specific organic compounds, such as a ratio or count, that is derived from a series of observations and that is used as an indicator or measure of environmental conditions.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: organic compound
narrower: P-aqueous
narrower: alkenone unsaturation index
narrower: archeol caldarcheol ecometric
narrower: branched and isoprenoid tetraether index
narrower: carbon preference index
narrower: chain length index
narrower: cyclization index of branched tetraethers
narrower: dinosterol ice proxy with 25 carbon atoms index
narrower: diol index
narrower: hydrogen index
narrower: isomer ratio
narrower: long-chain diol index
narrower: methane index
narrower: methylation index of branched tetraethers
narrower: oxygen index
narrower: ratio of isomeric ketones
narrower: ring index
narrower: terrestrial to aquatic ratio
narrower: tetraether index of 86 carbon atoms
narrower: vegetation change index
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

octacosanol
type: Concept
definition: an n-alkanol with the chemical formula C28H58O that is a biomarker of terrestrial plants.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: n-alkanol
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

organic pigment
type: Concept
definition: an organic compound that changes the color of reflected or transmitted light as the result of wavelength-selective absorption (Credit: Wikipedia).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: organic compound
narrower: carotenoid
narrower: chlorin
narrower: chlorophyll
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

C16 n-alkanoic acid
type: Concept
definition: a n-alkanoic acid with the formula C15H31COOH.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: n-alkanoic acid
related: loess and paleosol
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

C17 n-alkanoic acid
type: Concept
definition: a n-alkanoic acid with the formula C16H33COOH.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: n-alkanoic acid
related: loess and paleosol
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

C18 n-alkanoic acid
type: Concept
definition: a n-alkanoic acid with the formula C17H35COOH.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: n-alkanoic acid
related: loess and paleosol
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

C19 n-alkanoic acid
type: Concept
definition: a n-alkanoic acid with the formula C18H37COOH.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: n-alkanoic acid
related: loess and paleosol
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

C20 n-alkanoic acid
type: Concept
definition: a n-alkanoic acid with the formula C19H39COOH.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: n-alkanoic acid
related: loess and paleosol
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

C21 n-alkanoic acid
type: Concept
definition: a n-alkanoic acid with the formula C20H41COOH.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: n-alkanoic acid
related: loess and paleosol
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

C23 n-alkanoic acid
type: Concept
definition: a n-alkanoic acid with the formula C22H45COOH.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: n-alkanoic acid
related: loess and paleosol
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

C25 n-alkanoic acid
type: Concept
definition: a n-alkanoic acid with the formula C24H49COOH.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: n-alkanoic acid
related: loess and paleosol
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

C29 n-alkanoic acid
type: Concept
definition: a n-alkanoic acid with the formula C28H57COOH.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: n-alkanoic acid
related: loess and paleosol
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

C31 n-alkanoic acid
type: Concept
definition: a n-alkanoic acid with the formula C30H61COOH.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: n-alkanoic acid
related: loess and paleosol
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

C33 n-alkanoic acid
type: Concept
definition: a n-alkanoic acid with the formula C32H65COOH.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: n-alkanoic acid
related: loess and paleosol
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

C27 n-alkanoic acid
type: Concept
definition: a n-alkanoic acid with the formula C26H53COOH.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: n-alkanoic acid
related: loess and paleosol
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

C34 n-alkanoic acid
type: Concept
definition: a n-alkanoic acid with the formula C33H67COOH.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: n-alkanoic acid
related: loess and paleosol
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

alcohol
type: Concept
definition: an organic hydroxy compound that has a hydroxyl functional group bound to a saturated carbon atom.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: organic hydroxy compound
narrower: arborinol
narrower: long-chain alkyl diol
narrower: n-alkanol
narrower: phytol
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

C29 n-alkanoic acid
type: Concept
definition: a n-alkanoic acid with the formula C28H57COOH.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: n-alkanoic acid
related: loess and paleosol
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

alkane
type: Concept
definition: a hydrocarbon that is an acyclic and saturated with the general chemical formula CnH(2n+2).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: hydrocarbon
narrower: n-alkane
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

sterol
type: Concept
definition: an organic hydroxy compound that has a hydroxyl group at the 3-position of the A-ring.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: organic hydroxy compound
narrower: brassicasterol
narrower: cholesterol
narrower: dinosterol
narrower: taraxerol
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

ketone
type: Concept
definition: a carbonyl compound that has the general formula RC(=O)R'.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: carbonyl compound
narrower: alkenone
created: 2018-03-26 00:00:00.0
modified: 2021-04-19 13:34:15.0

ketone
type: Concept
definition: an organooxygen compound that has the general formula RC(=O)R'.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: organooxygen compound
narrower: alkenone
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

230Th excess
type: Concept
definition: the concentration of 230Th that is produced by the decay of dissolved 234U in the water column, that is measured sedimentary 230Th with any contributions from detrital material or decay of sedimentary 234U removed.
alternative label: thorium-230 excess
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 230Th
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

barium excess
type: Concept
definition: the amount of total barium minus the fraction associated with terrigenous material.
alternative label: Ba excess
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: barium
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

231Pa excess
type: Concept
definition: the concentration of 231Pa that is produced by the decay of dissolved 235U in the water column, that is measured sedimentary 231Pa with any contributions from detrital material or decay of sedimentary 235U removed.
alternative label: protactinium-231 excess
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 231Pa
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

231Pa/230Th excess
type: Concept
definition: the ratio of 231Pa to 230Th that is produced by the decay of dissolved uranium in the water column, that is measured sedimentary 231Pa/230Th with any contributions from detrital material or decay of sedimentary uranium removed.
alternative label: protactinium-231/thorium-230 excess
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: 231Pa/230Th
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

alkene
type: Concept
definition: a hydrocarbon that is unsaturated with at least one carbon-carbon double bond and the general formula CnH2n.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: hydrocarbon
narrower: botryococcene
narrower: highly-branched isoprenoid alkene
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

aromatic compound
type: Concept
definition: an organic compound that is highly-stable, cyclic, and planar with a ring of resonance bonds.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: organic compound
narrower: fulvic acid
narrower: lignin
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

Globigerinoides ruber white
type: Concept
definition: a chromotype of Globigerinoides ruber that produces unpigmented, or white, tests.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: Globigerinoides ruber
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

Globigerinoides ruber pink
type: Concept
definition: a chromotype of Globigerinoides ruber that produces pink-pigmented tests.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: Globigerinoides ruber
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

Globigerinoides ruber sensu stricto
type: Concept
definition: a morphotype of Globigerinoides ruber that is symmetrical with spherical chambers.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: Globigerinoides ruber
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

Globigerinoides ruber sensu lato
type: Concept
definition: a morphotype of Globigerinoides ruber that forms compact, non-spherical chambers.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: Globigerinoides ruber
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

Trilobatus sacculifer with sac
type: Concept
definition: a morphotype of Trilobatus sacculifer that has a sac-like terminal chamber.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: Trilobatus sacculifer
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

Trilobatus sacculifer without sac
type: Concept
definition: a morphotype of Trilobatus sacculifer that lacks a sac-like terminal chamber.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: Trilobatus sacculifer
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

Neogloboquadrina pachyderma sinistral
type: Concept
definition: the left-coiling morphotype of Neogloboquadrina pachyderma.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: Neogloboquadrina pachyderma
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

Neogloboquadrina pachyderma dextral
type: Concept
definition: the right-coiling morphotype of Neogloboquadrina pachyderma.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: Neogloboquadrina pachyderma
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

Globorotalia truncatulinoides encrusted
type: Concept
definition: the encrusted variant of Globorotalia truncatulinoides.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: Globorotalia truncatulinoides
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

Globorotalia truncatulinoides non-encrusted
type: Concept
definition: the non-encrusted variant of Globorotalia truncatulinoides.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: Globorotalia truncatulinoides
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

biogenic silica
type: Concept
definition: a hydrated, amorphous form of silicon dioxide with the formula SiO2•nH20 that is biogenically precipitated by a variety of organisms including chrysophytes, diatoms, radiolarians, silicoflagellates, and sponges (Credit: Last et al. 2001 Tracking Environmental Change Using Lake Sediments).
alternative label: biogenic opal
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: silicon dioxide
related: paleoceanography
related: paleolimnology
related: speleothems
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

Uvigerina peregrina
type: Concept
definition: a particular species of the genus Uvigerina.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: Uvigerina sp.
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

brassicasterol
type: Concept
definition: a sterol that has the chemical formula C28H46O and is synthesized by several unicellular algae (phytoplankton) and some terrestrial plants.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: sterol
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

taraxerol
type: Concept
definition: a sterol that has the chemical formula C30H50O.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: sterol
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

cholesterol
type: Concept
definition: a sterol that has the chemical formula C27H46O.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: sterol
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

alkenone unsaturation index Uk37
type: Concept
definition: an alkenone unsaturation index that compares the amounts of C37:2, C37:3, and C37:4 alkenones, as (C37:2-C37:4)/(C37:2+C37:3+C37:4).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: alkenone unsaturation index
related: instrumental
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

alkenone unsaturation index Uk37 prime
type: Concept
definition: an alkenone unsaturation index that compares the amounts of C37:2 and C37:3 alkenones, as C37:2/(C37:2+C37:3).
alternative label: Uk37 prime
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: alkenone unsaturation index
related: instrumental
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

Globigerinoides ruber white
type: Concept
definition: a chromotype of Globigerinoides ruber that produces unpigmented, or white, tests.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: Globigerinoides ruber
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

Globigerinoides ruber pink
type: Concept
definition: a chromotype of Globigerinoides ruber that produces pink-pigmented tests.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: Globigerinoides ruber
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

Globigerinoides ruber sensu lato
type: Concept
definition: a morphotype of Globigerinoides ruber that forms compact, non-spherical chambers.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: Globigerinoides ruber
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

Globigerinoides ruber sensu stricto
type: Concept
definition: a morphotype of Globigerinoides ruber that is symmetrical with spherical chambers.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: Globigerinoides ruber
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

Neogloboquadrina pachyderma dextral
type: Concept
definition: the right-coiling morphotype of Neogloboquadrina pachyderma.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: Neogloboquadrina pachyderma
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

Neogloboquadrina pachyderma sinistral
type: Concept
definition: the left-coiling morphotype of Neogloboquadrina pachyderma.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: Neogloboquadrina pachyderma
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

Trilobatus sacculifer with sac
type: Concept
definition: a morphotype of Trilobatus sacculifer that has a sac-like terminal chamber.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: Trilobatus sacculifer
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

Trilobatus sacculifer without sac
type: Concept
definition: a morphotype of Trilobatus sacculifer that lacks a sac-like terminal chamber.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: Trilobatus sacculifer
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

Globorotalia truncatulinoides encrusted
type: Concept
definition: the encrusted variant of Globorotalia truncatulinoides.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: Globorotalia truncatulinoides
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

Globorotalia truncatulinoides non-encrusted
type: Concept
definition: the non-encrusted variant of Globorotalia truncatulinoides.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: Globorotalia truncatulinoides
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

delta 34S
type: Concept
definition: the ratio of two isotopes of sulfur, 34S/32S, in a sample compared to that of a standard, typically Vienna-CDT, as in: ((34S/32S sample)/(34S/32S standard) - 1) x 1000.
alternative label: d34S
alternative label: delta S34
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: isotope ratio
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

32S
type: Concept
definition: the concentration of a stable isotope of sulfur with 16 neutrons.
alternative label: sulfur-32
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: single isotope concentration
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

delta 33S
type: Concept
definition: the ratio of two isotopes of sulfur, 33S/32S, in a sample compared to that of a standard, typically Vienna-CDT, as in: ((33S/32S sample)/(33S/32S standard) - 1) x 1000.
alternative label: d33S
alternative label: delta S33
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: isotope ratio
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

delta 36S
type: Concept
definition: the ratio of two isotopes of sulfur, 36S/32S, in a sample compared to that of a standard, typically Vienna-CDT, as in: ((36S/32S sample)/(36S/32S standard) - 1) x 1000.
alternative label: d36S
alternative label: delta S36
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: isotope ratio
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

lake area
type: Concept
definition: a geographic variable that quantifies the surface area of one or multiple lakes.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: geographic variable
related: climate reconstructions
related: instrumental
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-08-14 16:22:41.0

wetland area
type: Concept
definition: a geographic variable that quantifies the surface area of wetlands over specified geographic bounds.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: geographic variable
related: climate reconstructions
related: instrumental
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-08-14 16:22:31.0

paleodrainage direction
type: Concept
definition: a geographic variable that describes the direction of streamflow in the past.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: geographic variable
related: climate reconstructions
created: 2018-03-26 00:00:00.0
modified: 2020-08-14 16:23:25.0

ocean area
type: Concept
definition: a geographic variable that quantifies the surface area of the ocean over specified geographic bounds.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: geographic variable
related: climate reconstructions
created: 2018-03-26 00:00:00.0
modified: 2020-08-14 16:23:11.0

goodness-of-fit measure
type: Concept
definition: an error measure that quantifies how well a statistical or physically-based model fits a set of observations.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: error
narrower: bias
narrower: chi-square
narrower: coefficient of determination
narrower: communality
narrower: correlation coefficient
narrower: dissimilarity measure
narrower: root mean square error
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

dissimilarity measure
type: Concept
definition: a goodness-of-fit measure that quantifies the relative similarity between a sample and its modern analogue for an analogue method calculation.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: goodness-of-fit measure
narrower: squared chord distance
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

validation root mean square error
type: Concept
definition: the root mean square error applied to the validation period, defined as the sample standard deviation of the differences between predicted values and observed values over the validation period, or sqrt (sum(predicted-observed)^2/sample size).
alternative label: validation RMSE
alternative label: verification RMSE
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: root mean square error
related: climate reconstructions
created: 2018-03-26 00:00:00.0
modified: 2020-06-18 10:38:09.0

multivariate eigenvector-based variable
type: Concept
definition: a statistical variable that is calculated using eigenvector-based methods to combine multiple data variables for data compression and dimensionality reduction.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: statistical variable
narrower: correspondence analysis axis
narrower: empirical orthogonal function
narrower: factor score
narrower: principal component
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

hydroclimate ratio
type: Concept
definition: a hydroclimate variable that measures a hydroclimatic quantity or rate relative to another.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: hydroclimatic variable
narrower: actual/potential evapotranspiration
narrower: cloud cover
narrower: cloud ice mixing ratio
narrower: cloud liquid water mixing ratio
narrower: relative humidity
narrower: runoff coefficient
narrower: specific humidity
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

hydroclimate rate
type: Concept
definition: a hydroclimate variable that measures a quantity per time.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: hydroclimatic variable
narrower: evaporation
narrower: evapotranspiration
narrower: precipitation
narrower: precipitation minus evaporation
narrower: precipitation minus evapotranspiration
narrower: precipitation minus potential evapotranspiration
narrower: runoff
narrower: streamflow
narrower: transpiration
narrower: virtual salt flux
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

hydroclimate index
type: Concept
definition: a hydroclimate variable that measures a quantity on a relative scale.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: hydroclimatic variable
narrower: Palmer Drought Severity Index
narrower: Palmer Hydrologic Drought Index
narrower: Palmer Modified Drought Index
narrower: moisture index
narrower: standardized precipitation evapotranspiration index
narrower: standardized precipitation index
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

temperature
type: Concept
definition: the mean temperature over a particular time period.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: temperature variable
narrower: air temperature
narrower: ice temperature
narrower: lake water temperature
narrower: land temperature
narrower: sea water temperature
narrower: snow temperature
narrower: soil temperature
narrower: surface temperature
related: climate reconstructions
related: corals and sclerosponges
related: historical
related: ice cores
related: insect
related: instrumental
related: paleoceanography
related: paleoclimatic modeling
related: paleolimnology
related: speleothems
related: tree ring
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

maximum temperature
type: Concept
definition: the highest temperature over a particular time period.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: temperature variable
narrower: maximum air temperature
narrower: maximum surface temperature
related: climate reconstructions
related: historical
related: instrumental
related: paleoclimatic modeling
related: tree ring
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

minimum temperature
type: Concept
definition: the lowest temperature over a particular time period.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: temperature variable
narrower: minimum air temperature
narrower: minimum surface temperature
related: climate reconstructions
related: historical
related: instrumental
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

minimum surface temperature
type: Concept
definition: the minimum temperature at the earth surface over a particular time period in a given location.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: minimum temperature
related: climate reconstructions
related: historical
related: instrumental
related: paleoclimatic modeling
related: tree ring
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

minimum air temperature
type: Concept
definition: the minimum temperature of air at a level of the atmosphere.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: minimum temperature
related: climate reconstructions
related: historical
related: instrumental
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

maximum surface temperature
type: Concept
definition: the maximum temperature at the earth surface over a particular time period in a given location.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: maximum temperature
related: climate reconstructions
related: historical
related: instrumental
related: paleoclimatic modeling
related: tree ring
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

maximum air temperature
type: Concept
definition: the maximum temperature of air at a level of the atmosphere.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: maximum temperature
related: climate reconstructions
related: historical
related: instrumental
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

storm track
type: Concept
definition: a storm variable that quantifies aspects of storms that travel in relatively narrow zones driven by the prevailing winds, including their location or their strength.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: storm variable
related: climate reconstructions
related: instrumental
related: tree ring
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

Atlantic Multidecadal Variability Index
type: Concept
definition: a circulation index that is calculated from the average anomalies of sea surface temperatures in the North Atlantic basin, usually from 0 to 80 degrees north and that represents the combined externally forced climate signal along with internal variability.
alternative label: AMV
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: circulation index
related: instrumental
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

runoff coefficient
type: Concept
definition: the hydroclimate ratio of catchment runoff to catchment precipitation.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: hydroclimate ratio
related: climate reconstructions
related: instrumental
related: tree ring
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

chrysophyte assemblage
type: Concept
definition: an assemblage of golden or golden-brown algae that belong to the kingdom Chromista, class Chrysophyceae.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: biological assemblage
related: climate reconstructions
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

dinoflagellate assemblage
type: Concept
definition: an assemblage of organisms that belong to the kingdom Chromista, division Pyrrophycophyta.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: biological assemblage
related: climate reconstructions
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

boron/calcium
type: Concept
definition: the elemental ratio of boron to calcium.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or compound ratio
related: climate reconstructions
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

parts per thousand
type: Concept
definition: a parts per notation unit which denotes the amount of a given substance in a total amount of 1000 regardless of the units of measure as long as they are the same (Credit: Units of measurement ontology).
alternative label: ppt
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: parts per notation unit
narrower: per mil
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

nanomole per kilogram
type: Concept
definition: a molality unit which expresses a concentration of a solution of one billionth of a mole, or 10^[-9] mole, per kilogram of solvent.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: molality unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

infilled
type: Concept
definition: a data transformation that involves replacing missing values with data values estimated using some statistical technique.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: detail
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

inverse model
type: Concept
definition: a numerical model in which observations are combined with physical laws to produce estimates of parameters.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: numerical simulation
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

forward model
type: Concept
definition: a numerical simulation in which the current state is used to predict the next state, with adjustment of parameters to improve fit to observations.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: numerical simulation
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

square meter per square second
type: Concept
definition: a specific energy unit that is typically a measure of kinetic energy per unit mass.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: specific energy unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

mass density unit
type: Concept
definition: a density unit which is a standard measure of the mass of a substance in a given volume (Credit: Units of measurement ontology).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: unit
narrower: gram per cubic centimeter
narrower: gram per cubic meter
narrower: gram per liter
narrower: kilogram per cubic meter
narrower: microgram per cubic micrometer
narrower: microgram per liter
narrower: milligram per cubic centimeter
narrower: milligram per cubic meter
narrower: milligram per liter
narrower: nanogram per liter
narrower: picogram per liter
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

hypothesis testing variable
type: Concept
definition: a statistical variable that is calculated for hypothesis testing.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: statistical variable
narrower: p-value
narrower: t-statistic
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

p-value
type: Concept
definition: a hypothesis testing variable that is the probability of finding either the observed or more extreme results when the null hypothesis (H0) of a study question is true.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: hypothesis testing variable
related: climate reconstructions
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

coefficient of determination
type: Concept
definition: a goodness-of-fit measure that is is the proportion of the variance in the dependent variable that is predictable from the independent variable(s).
alternative label: R squared
alternative label: R-squared
alternative label: R2
alternative label: r2
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: goodness-of-fit measure
narrower: calibration coefficient of determination
narrower: cross-validation coefficient of efficiency
narrower: cross-validation reduction of error
narrower: validation coefficient of determination
narrower: validation coefficient of efficiency
narrower: validation reduction of error
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

bias
type: Concept
definition: a goodness-of-fit measure that measures a systematic difference between the predictand and the predictor and is calculated as the difference between the average prediction and the average observed value.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: goodness-of-fit measure
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

root mean square error
type: Concept
definition: a goodness-of-fit measure that measures the differences between values predicted by a model or an estimator and the values actually observed.
alternative label: RMSE
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: goodness-of-fit measure
narrower: calibration root mean square error
narrower: one root mean square error
narrower: one root mean square error lower bound
narrower: one root mean square error upper bound
narrower: two root mean square error
narrower: two root mean square error lower bound
narrower: two root mean square error upper bound
narrower: validation root mean square error
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

geographic variable
type: Concept
definition: an earth system variable that quantifies the distribution or location of physical features.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: earth system variable
narrower: lake area
narrower: lake level
narrower: land area
narrower: ocean area
narrower: paleodrainage direction
narrower: sea level
narrower: water table depth
narrower: wetland area
created: 2018-03-26 00:00:00.0
modified: 2020-08-14 16:21:58.0

identified radiolarian
type: Concept
definition: a radiolarian that has been identified taxonomically.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: radiolarian
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

identified coccolithophore
type: Concept
definition: a coccolithophore that has been identified taxonomically.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: coccolithophore
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

identified sponge
type: Concept
definition: a sponge that has been identified taxonomically.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: sponge
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

Globigerinella sp.
type: Concept
definition: any foraminifer that belongs to the genus Globigerinella.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: planktic foraminifer
narrower: Globigerinella siphonifera
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

Globigerinella siphonifera
type: Concept
definition: a particular species of the genus Globigerinella.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: Globigerinella sp.
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

alcohol
type: Concept
definition: an organic hydroxy compound that has a hydroxyl functional group bound to a saturated carbon atom.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: organic hydroxy compound
narrower: n-alkanol
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

highly-branched isoprenoid alkene
type: Concept
definition: an alkene that is highly-branched and composed of a number of isoprene (C5H8) units and that is produced by a relatively small number of marine and freshwater diatoms belonging to the Haslea, Navicula, Pleurosigma, and Rhizosolenia genera (Credit: Belt et al. 2013, 10.1016/j.quascirev.2012.12.001).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: alkene
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

lignin
type: Concept
definition: a class of cross-linked phenolic polymers found in vascular plants and some algae.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: aromatic compound
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

specific volume unit
type: Concept
definition: a unit which is a standard measure of the volume of a given mass of substance (the reciprocal of density) (Credit: Units of measurement ontology).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: unit
narrower: cubic centimeter per gram
narrower: cubic centimeter per kilogram
narrower: cubic meter per kilogram
narrower: milliliter per gram
narrower: milliliter per kilogram
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

electrical conductivity unit
type: Concept
definition: an electromagnetic unit which represents a standard measurement of the movement of electrically charged particles per unit shape of the transmission medium (electrical conductor). The electrical conductivity is related to electrical conductance by G = sigma * A / l where G is conductance, sigma is conductivity, A is area of conductor and l is length of the conductor.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: electromagnetic unit
narrower: microsiemens per centimeter
narrower: microsiemens per meter
narrower: millisiemens per centimeter
narrower: siemens per meter
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

molality unit
type: Concept
definition: a concentration unit which is a standard measure of the number of moles of a given substance per kilogram of solvent (Credit: Units of measurement ontology).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: concentration unit
narrower: micromole per gram
narrower: micromole per kilogram
narrower: millimole per gram
narrower: millimole per kilogram
narrower: mole per kilogram
narrower: molecule per gram
narrower: nanomole per gram
narrower: nanomole per kilogram
narrower: nanomole per milligram
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

molarity unit
type: Concept
definition: a concentration unit which is a standard measure of the number of moles of a given substance per liter of solution (Credit: Units of measurement ontology).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: concentration unit
narrower: micromole per cubic meter
narrower: micromole per liter
narrower: millimole per cubic meter
narrower: millimole per liter
narrower: mole per cubic meter
narrower: nanomole per cubic meter
narrower: nanomole per liter
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

unspecified unit
type: Concept
definition: units unknown.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

mass fraction unit
type: Concept
definition: a concentration unit that denotes the mass of one subcomponent of a sample as a proportion the mass of either another subcomponent or of the entire sample.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: concentration unit
narrower: gram per kilogram
narrower: kilogram per kilogram
narrower: microgram per gram
narrower: microgram per kilogram
narrower: microgram per milligram
narrower: milligram per gram
narrower: milligram per kilogram
narrower: milligram per milligram
narrower: nanogram per gram
narrower: picogram per gram
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

mole fraction unit
type: Concept
definition: a concentration unit which denotes the number of moles of solute as a proportion of the total number of moles in a solution (Credit: Units of measurement ontology).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: concentration unit
narrower: micromole per mole
narrower: millimole per mole
narrower: mole per millimole
narrower: mole per mole
narrower: nanomole per micromole
narrower: nanomole per mole
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

specific activity unit
type: Concept
definition: a unit which is a standard measure of the radioactivity of a given mass of substance.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: unit
narrower: disintegration per minute per cubic centimeter
narrower: disintegration per minute per gram
narrower: disintegration per minute per kilogram
narrower: picoCurie per kilogram
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

volume area unit
type: Concept
definition: a concentration unit that is a standard measurement of area per unit volume.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: concentration unit
narrower: square centimeter per milliliter
narrower: square micrometer per milliliter
narrower: square millimeter per milliliter
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

lithium/magnesium
type: Concept
definition: the elemental ratio of lithium to magnesium.
alternative label: Li/Mg
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or compound ratio
related: corals and sclerosponges
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

identified silicoflagellate
type: Concept
definition: a silicoflagellate that has been identified taxonomically.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: silicoflagellate
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

total coccoliths
type: Concept
definition: a coccolithophore index that is the total number of coccoliths, the individual plates of calcium carbonate produced by coccolithophores, in a sample.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: coccolithophore index
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

relative unit
type: Concept
definition: a dimensionless unit that is a ratio of a measurement to some arbitrarily or non-arbitrarily chosen reference value.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: dimensionless
narrower: Hounsfield unit
narrower: practical salinity unit
narrower: tritium unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

volume fraction unit
type: Concept
definition: a concentration unit that denotes the volume of one subcomponent of a sample as a proportion of the volume of either another subcomponent or of the entire sample.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: concentration unit
narrower: cubic centimeter per liter
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

identified echinoid
type: Concept
definition: an echinoid that has been identified taxonomically.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: echinoid
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

echinoid index
type: Concept
definition: a measurement of echinoids, such as a ratio or count, that is derived from a series of observations and that is used as an indicator or measure.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: echinoid
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

identified cladoceran
type: Concept
definition: a cladoceran that has been identified taxonomically.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: cladoceran
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

C32 n-alkane
type: Concept
definition: a n-alkane with the chemical formula C32H66.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: n-alkane
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

chemical composition
type: Concept
definition: the amounts or relative amounts of the elements, or isotopes of the elements, that constitute a substance.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: what
narrower: compound
narrower: element or compound ratio
narrower: element or single-element molecule
narrower: isotope
narrower: solution property
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

compound
type: Concept
definition: a chemical that is composed of two or more elements.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: chemical composition
narrower: inorganic compound
narrower: organic compound
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

non-calendric period
type: Concept
definition: a reconstructed seasonality that does not strictly adhere to specified months of the calendar year.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: seasonality
narrower: coldest month
narrower: fall
narrower: growing season
narrower: spring
narrower: summer
narrower: warmest month
narrower: winter
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

organosulfur compound
type: Concept
definition: an organic compound that contains at least one carbon-sulfur bond.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: organic compound
narrower: methanesulfonate
narrower: methanesulfonic acid
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

organooxygen compound
type: Concept
definition: an organic compound that contains at least one carbon-oxygen bond.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: organic compound
narrower: carbonyl compound
narrower: ether
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

wood
type: Concept
definition: a porous and fibrous structural tissue that is found in the stems and roots of trees and other woody plants (Credit: Wikipedia).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: tissue
narrower: earlywood
narrower: latewood
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

identified ostracod
type: Concept
definition: an ostracod that has been identified taxonomically.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: ostracod
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

earlywood
type: Concept
definition: wood that formed early in the growing season and that tends to consist of large and thin-walled cells.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: wood
related: tree ring
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

branched alkane
type: Concept
definition: an alkane that has a branched structure, in which the carbon backbone splits off in one or more directions.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: alkane
narrower: phytane
narrower: pristane
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

cyclic alkane
type: Concept
definition: an alkane with one or more rings or loops.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: alkane
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

hydrocarbon
type: Concept
definition: an organic compound that consists of carbon and hydrogen only.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: organic compound
narrower: alkane
narrower: alkene
narrower: hopane
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

organic hydroxy compound
type: Concept
definition: an organic compound having at least one hydroxy group attached to a carbon atom.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: organic compound
narrower: alcohol
narrower: sterol
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

chain length index
type: Concept
definition: an organic compound index that is a measure of the number of carbon atoms in a organic compound chain.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: organic compound index
narrower: average chain length
narrower: modal chain length
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

average chain length
type: Concept
definition: a chain length index that is the average number of carbon atoms within organic compound chains in a sample.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: chain length index
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

modal chain length
type: Concept
definition: a chain length index that is the most frequently measured value of the number of carbon atoms in organic compound chains within a sample.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: chain length index
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

arborinol
type: Concept
definition: an alcohol that has the formula C30H50O and that are organic compounds produced by higher-order terrestrial vegetation.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: alcohol
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

long-chain alkyl diol
type: Concept
definition: an alcohol that consists of a long hydrocarbon chain and two hydroxy groups.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: alcohol
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

neon
type: Concept
definition: a chemical element with atomic number 10.
alternative label: Ne
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or single-element molecule
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

krypton
type: Concept
definition: a chemical element with atomic number 36.
alternative label: Kr
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or single-element molecule
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

xenon
type: Concept
definition: a chemical element with atomic number 54.
alternative label: Xe
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or single-element molecule
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

protactinium
type: Concept
definition: a chemical element with atomic number 91.
alternative label: Pa
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or single-element molecule
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

storm variable
type: Concept
definition: a circulation index that relates to the frequency or strength of tropical or extratropical storms.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: circulation index
narrower: storm track
narrower: tropical cyclone
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

relative standard deviation
type: Concept
definition: a standard deviation that is calculated as 100 multiplied by the sample standard deviation divided by the sample mean. It describes whether the standard deviation is large or small compared to the mean.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: standard deviation
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

solar irradiance
type: Concept
definition: a forcing variable that is the radiation from the sun integrated over the whole electromagnetic spectrum and over the entire solar disk. The quantity applies outside the atmosphere, by default at a distance of one astronomical unit from the sun.
alternative label: TSI
alternative label: solar constant
alternative label: total solar irradiance
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: forcing variable
related: climate forcing
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

Clathromorphum compactum
type: Concept
definition: a particular species of the genus Clathromorphum.
alternative label: Lithothamniom compactum
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: Clathromorphum sp.
related: corals and sclerosponges
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

alkenone unsaturation index Ume36
type: Concept
definition: an alkenone unsaturation index that compares the amounts of C36:2 and C36:3 alkenones, as C36:2/(C36:2+C36:3).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: alkenone unsaturation index
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

quartz
type: Concept
definition: a silicate mineral with the formula SiO2.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: identified mineral
related: loess and paleosol
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

millimole per kilogram
type: Concept
definition: a molality unit which expresses a concentration of a solution of one thousandth of a mole, or 10^[-3] mole, per kilogram of solvent.
alternative label: mmol/kg
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: molality unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

chemical composition
type: Concept
definition: a material used to create a climate reconstruction that is based on a measurement of chemical composition.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: material
narrower: compound
narrower: element or single-element molecule
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

biological assemblage
type: Concept
definition: the collection of organisms that occur together in space and time.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: reconstruction material
narrower: chrysophyte assemblage
narrower: coccolithophore assemblage
narrower: diatom assemblage
narrower: dinoflagellate assemblage
narrower: foraminifer assemblage
narrower: midge assemblage
narrower: ostracod assemblage
narrower: radiolarian assemblage
narrower: testate amoebae assemblage
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

isotope ratio
type: Concept
definition: the ratio of one isotope compared to another isotope.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: reconstruction material
narrower: Delta 47
narrower: Delta 48
narrower: delta 11B
narrower: delta 13C
narrower: delta 15N excess
narrower: delta 18O
narrower: delta 2H
created: 2018-03-26 00:00:00.0
modified: 2021-04-09 18:09:29.0

element or compound ratio
type: Concept
definition: a reconstruction material that is the ratio of elements or of compounds.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: reconstruction material
narrower: boron/calcium
narrower: cadmium/calcium
narrower: lithium/magnesium
narrower: magnesium/calcium
narrower: magnesium/lithium
narrower: manganese/calcium
narrower: strontium/calcium
narrower: uranium/calcium
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

delta 11B
type: Concept
definition: the ratio of two isotopes of boron, 11B/10B, in a sample compared to that of a standard, typically NIST SRM 951, as in: ((11B/10B sample)/(11B/10B standard) - 1) x 1000.
alternative label: d11B
alternative label: delta B11
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: isotope ratio
related: climate reconstructions
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

delta 2H
type: Concept
definition: the ratio of two isotopes of hydrogen, 2H/1H, in a sample compared to that of a standard, typically standard mean ocean water, as in: ((2H/1H sample)/(2H/1H standard) - 1) x 1000.
alternative label: d2H
alternative label: dD
alternative label: delta D
alternative label: delta H2
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: isotope ratio
related: climate reconstructions
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

cadmium/calcium
type: Concept
definition: the elemental ratio of cadmium to calcium.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or compound ratio
related: climate reconstructions
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

manganese/calcium
type: Concept
definition: the elemental ratio of manganese to calcium.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or compound ratio
related: climate reconstructions
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

uranium/calcium
type: Concept
definition: the elemental ratio of uranium to calcium.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or compound ratio
related: climate reconstructions
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

magnesium/calcium
type: Concept
definition: the elemental ratio of magnesium to calcium.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or compound ratio
related: climate reconstructions
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

variance
type: Concept
definition: a measure that is defined as the sum of the square difference of individual observations from the mean divided by the total number of observations.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: error
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

chemical variable
type: Concept
definition: an earth system variable that relates to the chemical composition or properties of a component of the earth system.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: earth system variable
narrower: calcium carbonate compensation depth
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

calcium carbonate compensation depth
type: Concept
definition: the depth in the oceans below which the rate of supply of calcium carbonate is equal to its dissolution and no calcium carbonate is preserved.
alternative label: calcite compensation depth
alternative label: lysocline depth
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: chemical variable
related: climate reconstructions
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

salinity
type: Concept
definition: a solution property that is the amount of salt dissolved in a body of water.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: solution property
related: climate reconstructions
related: corals and sclerosponges
related: instrumental
related: paleoceanography
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

carbonate ion
type: Concept
definition: an inorganic compound that has the chemical formula CO3(2-).
alternative label: CO3(2-)
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: inorganic compound
related: climate reconstructions
related: instrumental
related: paleoceanography
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

microgram per square centimeter per year
type: Concept
definition: a mass per area per time unit that is one millionth of a gram, or 10^[-6] g, per one ten-thousandth of a square meter, or 10^[-4] m^[2], per one year.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: mass per area per time unit
created: 2018-03-26 00:00:00.0
modified: 2020-08-24 12:30:05.0

foraminifer fragmentation
type: Concept
definition: a foraminiferal index that measure the degree to which foraminifers have been broken or fragmented.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: foraminiferal index
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

sortable silt mean grain size
type: Concept
definition: the mean diameter of particles in generally the 10-63 micrometer fraction of terrigenous material.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: grain size mean
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

microgram per square meter per day
type: Concept
definition: a mass per area per time unit that is one millionth of a gram, or 10^[-6] g, per one square meter, per one day.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: mass per area per time unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

count per cubic meter
type: Concept
definition: a count per volume unit that applies to one cubic meter.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: count per volume unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

Globorotalia inflata
type: Concept
definition: a particular species of the genus Globorotalia.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: identified foraminifer
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

amino acid
type: Concept
definition: a carbonyl compound that contains one or more amino groups of NH2.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: carbonyl compound
narrower: alanine
narrower: aspartic acid
narrower: aspartic acid and asparagine
narrower: glutamic acid
narrower: glutamic acid and glutamine
narrower: glycine
narrower: hydroxyproline
narrower: isoleucine
narrower: leucine
narrower: lysine
narrower: methionine
narrower: phenylalanine
narrower: proline
narrower: serine
narrower: threonine
narrower: tyrosine
narrower: valine
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2021-04-19 13:33:07.0

alanine
type: Concept
definition: an amino acid with the formula C3H7NO2.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: amino acid
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

glycine
type: Concept
definition: an amino acid with the formula C2H5NO2.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: amino acid
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

threonine
type: Concept
definition: an amino acid with the formula C4H9NO3.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: amino acid
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

serine
type: Concept
definition: an amino acid with the formula C3H7NO3.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: amino acid
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

valine
type: Concept
definition: an amino acid with the formula C5H11NO2.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: amino acid
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

leucine
type: Concept
definition: an amino acid with the formula C6H13NO2.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: amino acid
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

isoleucine
type: Concept
definition: an amino acid with the formula C6H13NO2 and a different chemical structure than leucine.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: amino acid
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

proline
type: Concept
definition: an amino acid with the formula C5H9NO2.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: amino acid
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

phenylalanine
type: Concept
definition: an amino acid with the formula C9H11NO2.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: amino acid
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

tyrosine
type: Concept
definition: an amino acid with the formula C9H11NO3.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: amino acid
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

lysine
type: Concept
definition: an amino acid with the formula C6H14N2O2.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: amino acid
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

aspartic acid and asparagine
type: Concept
definition: amino acids with the formulas C4H7NO4 or C4H8N2O3, that are often measured together because they easily convert from one to the other.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: amino acid
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

glutamic acid and glutamine
type: Concept
definition: amino acids with the formulas C5H9NO4 or C5H10N2O3, that are often measured together because they easily convert from one to the other.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: amino acid
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

microgram per day
type: Concept
definition: a mass per time unit that is one millionth of a gram, or 10^[-6] g, per one day.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: mass per time unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

mole per square meter per second
type: Concept
definition: a mole per area per time unit that is one mole, per one square meter, per one second.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: mole per area per time unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

day of year
type: Concept
definition: an age unit of day position in the year, starting with January 1.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: age unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

Globorotalia crassaformis
type: Concept
definition: a particular species of the genus Globorotalia.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: Globorotalia sp.
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

Globorotalia inflata
type: Concept
definition: a particular species of the genus Globorotalia.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: Globorotalia sp.
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

gravel
type: Concept
definition: the abundance or concentration of particles with a diameter between 2 and 63 millimeters.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: grain size class
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

age variable
type: Concept
definition: measurements relating to the age of a sample.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: what
narrower: age
narrower: reservoir age
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

reservoir age
type: Concept
definition: the age offset caused by a disequilibrium between atmospheric 14C and the 14C of water in a lake or in the global ocean.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: age variable
narrower: delta reservoir age
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

delta reservoir age
type: Concept
definition: an adjustment to ocean reservoir age that accounts for local disequilibrium between atmospheric and surface ocean 14C.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: reservoir age
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

depth variable
type: Concept
definition: measurements of the location of a sample within a core, usually relative to either the core top or core bottom.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: what
narrower: depth
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

square meter
type: Concept
definition: an area unit which is equal to an area enclosed by a square with sides each 1 meter long (Credit: Units of measurement ontology).
alternative label: m2
alternative label: square metre
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: area unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

pascal
type: Concept
definition: a pressure unit which is equal to the pressure or stress on a surface caused by a force of 1 newton spread over a surface of 1 m^[2] (Credit: Units of measurement ontology).
alternative label: Pa
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: pressure unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

liter
type: Concept
definition: a volume unit which is equal to one thousandth of a cubic meter or 10^[-3] m^[3], or to 1 decimeter (Credit: Units of measurement ontology).
alternative label: L
alternative label: l
alternative label: litre
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: volume unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

linear density unit
type: Concept
definition: a density unit which is a standard measure of the mass exerting an influence on a one-dimensional object (Credit: Units of measurement ontology).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: unit
narrower: gram per decimeter
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

electric current unit
type: Concept
definition: an electromagnetic unit which is a standard measure of the flow of electric charge (Credit: Units of measurement ontology).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: electromagnetic unit
narrower: ampere
narrower: kiloampere
narrower: microampere
narrower: milliampere
narrower: nanoampere
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

electric potential difference unit
type: Concept
definition: an electromagnetic unit which is a standard measure of the work done per unit charge as a charge is moved between two points in an electric field (Credit: Units of measurement ontology).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: electromagnetic unit
narrower: megavolt
narrower: millivolt
narrower: volt
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

magnetic flux density unit
type: Concept
definition: an electromagnetic unit that is a standard measure of the strength of a magnetic field and that can be thought of as the concentration of field lines through an area perpendicular to their direction.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: electromagnetic unit
narrower: millitesla
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

electrical conduction unit
type: Concept
definition: a unit which represents a standard measurement of the movement of electrically charged particles through a transmission medium (electrical conductor) (Credit: Units of measurement ontology).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: electromagnetic unit
narrower: microsiemens
narrower: nanosiemens
narrower: siemens
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

total radiolarians
type: Concept
definition: the count of total radiolarians in a sample.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: radiolarian index
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

total silicoflagellates
type: Concept
definition: the count of total silicoflagellates in a sample.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: silicoflagellate index
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

dinoflagellate
type: Concept
definition: an identifiable organism that belongs to the kingdom Chromista, division Pyrrophycophyta.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: organism
narrower: dinoflagellate index
narrower: identified dinoflagellate
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

identified dinoflagellate
type: Concept
definition: a dinoflagellate that has been identified taxonomically.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: dinoflagellate
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

dinoflagellate index
type: Concept
definition: a measurement of dinoflagellates, such as a ratio or count, that is derived from a series of observations and that is used as an indicator or measure.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: dinoflagellate
narrower: total dinocysts
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

total calcareous nannofossils
type: Concept
definition: a coccolithophore index that is the total number of calcareous nannofossils, primarily coccoliths but additionally small calcite nannoliths of uncertain origin, in a sample.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: coccolithophore index
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

Globorotalia hirsuta
type: Concept
definition: a particular species of the genus Globorotalia.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: Globorotalia sp.
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

Globorotalia tumida
type: Concept
definition: a particular species of the genus Globorotalia.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: Globorotalia sp.
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

paleoclimatic modeling
type: Concept
definition: a data type that includes output from numerical models such as global climate models or proxy system models.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: data type
related: 10Be
related: 13C
related: 14C
related: 210Pb
related: 36Cl
related: 7Be
related: Antarctic Bottom Water
related: Delta 14C
related: Hadley circulation index
related: Intertropical Convergence Zone index
related: Niño 1+2 sea surface temperature index
related: Niño 3 sea surface temperature index
related: Niño 3.4 sea surface temperature index
related: Niño 4 sea surface temperature index
related: North Atlantic Deep Water
related: North Pacific Intermediate Water
related: aerosol optical depth
related: air potential temperature
related: air temperature
related: alkalinity
related: alpha cellulose
related: aragonite
related: aragonite saturation state
related: atmospheric boundary layer thickness
related: barosteric sea level change
related: barotropic streamfunction
related: bedrock elevation
related: benthic foraminifer
related: biomass burning
related: biome
related: bulk atmosphere
related: bulk ice
related: burned area
related: calcite
related: calcite saturation state
related: calcium
related: calcium carbonate
related: canopy height
related: carbon
related: carbon dioxide
related: carbon/phosphorus
related: carbonate ion
related: cloud condensed water content
related: cloud cover
related: cloud ice content
related: cloud ice mixing ratio
related: cloud liquid water content
related: cloud liquid water mixing ratio
related: collection elevation
related: convective precipitation
related: convective snowfall
related: delta 13C
related: delta 15N
related: delta 18O
related: denitrification
related: diazotroph
related: dissolved inorganic carbon
related: dissolved iron
related: dissolved organic carbon
related: dissolved organic nitrogen
related: dissolved organic phosphorus
related: dissolved oxygen
related: dissolved phosphate
related: eastward wind speed
related: eustatic sea level
related: evaporation
related: evapotranspiration
related: excretion
related: export
related: foliage projective cover
related: geopotential height
related: grazing
related: halosteric sea level change
related: hydrogen carbonate
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

climate forcing
type: Concept
definition: a data type that includes measurements of factors, generally originating from outside the climate system, that influence or change climate.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: data type
related: International Geo Sample Number
related: aerosol optical depth
related: age
related: age at sample end
related: age at sample start
related: anthropogenic aerosol forcing
related: carbon dioxide
related: collection date
related: collection elevation
related: cosmic ray flux
related: cosmic ray-induced ionization
related: depth
related: depth at sample end
related: depth at sample start
related: effective aerosol radius
related: greenhouse gas forcing
related: insolation
related: latitude
related: longitude
related: methane
related: nitrous oxide
related: notes
related: number of samples
related: orbital parameter
related: proxy composite
related: sample identification
related: sample thickness
related: solar irradiance
related: solar modulation potential
related: sunspot number
related: volcanic forcing
related: volcanic sulfate
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

one root mean square error lower bound
type: Concept
definition: the root mean square error subtracted from the predicted value, which yields a lower (minimum) bound of an interval that captures actual values 68% of the time.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: root mean square error
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

one root mean square error upper bound
type: Concept
definition: the root mean square error added to the predicted value, which yields an upper (maximum) bound of an interval that captures actual values 68% of the time.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: root mean square error
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

two root mean square error
type: Concept
definition: two times the root mean square error. Actual values are within two root mean square error of the predicted value 95% of the time.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: root mean square error
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

two root mean square error lower bound
type: Concept
definition: two times the root mean square error subtracted from the predicted value, which yields a lower (minimum) bound of an interval that captures actual values 95% of the time.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: root mean square error
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

two root mean square error upper bound
type: Concept
definition: two times the root mean square error added to the predicted value, which yields an upper (maximum) bound of an interval that captures actual values 95% of the time.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: root mean square error
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

one root mean square error
type: Concept
definition: a goodness-of-fit measure that is defined as the sample standard deviation of the differences between predicted values and observed values, or sqrt (sum(predicted-observed)^2/sample size). Actual values are within one root mean square error of the predicted value 68% of the time.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: root mean square error
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

pollen
type: Concept
definition: a data type that includes measurements of plant pollen and spores.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: data type
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

total foraminifers
type: Concept
definition: the total count of foraminifers in a sample.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: foraminiferal index
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

insect
type: Concept
definition: a data type that includes measurements made on insect remains.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: data type
related: electrical conductivity
related: identified beetle
related: identified insect
related: identified midge
related: insect index
related: lake surface temperature
related: midge index
related: surface air temperature
related: temperature
related: total head capsules
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

other collections
type: Concept
definition: a data type that includes measurements from a number of novel paleoclimate proxy types and methods.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: data type
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

Pulleniatina obliquiloculata
type: Concept
definition: a particular species of the genus Pulleniatina.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: Pulleniatina sp.
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

Cibicidoides mundulus
type: Concept
definition: a particular species of the genus Cibicidoides.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: Cibicidoides sp.
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

Cibicides sp.
type: Concept
definition: any foraminifer that belongs to the genus Cibicides.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: calcareous benthic foraminifer
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

Cibicidoides kullenbergi
type: Concept
definition: a particular species of the genus Cibicidoides.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: Cibicidoides sp.
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

Cibicidoides pachyderma
type: Concept
definition: a particular species of the genus Cibicidoides.
alternative label: Cibicides pachyderma
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: Cibicidoides sp.
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

Nuttallides sp.
type: Concept
definition: any foraminifer that belongs to the genus Nuttallides.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: calcareous benthic foraminifer
narrower: Nuttallides umbonifera
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

Nuttallides umbonifera
type: Concept
definition: a particular species of the genus Nuttallides.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: Nuttallides sp.
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

Oridorsalis sp.
type: Concept
definition: any foraminifer that belongs to the genus Oridorsalis.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: calcareous benthic foraminifer
narrower: Oridorsalis umbonatus
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

Oridorsalis umbonatus
type: Concept
definition: a particular species of the genus Oridorsalis.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: Oridorsalis sp.
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

Melonis sp.
type: Concept
definition: any foraminifer that belongs to the genus Melonis.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: calcareous benthic foraminifer
narrower: Melonis affinis
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

Melonis affinis
type: Concept
definition: a particular species of the genus Melonis.
alternative label: Melonis barleeanus
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: Melonis sp.
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

Neogloboquadrina incompta
type: Concept
definition: a particular species of the genus Neogloboquadrina.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: Neogloboquadrina sp.
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

wavelength
type: Concept
definition: a wave property that is the distance over which a wave's shape repeats.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: wave property
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

Pseudodiploria sp.
type: Concept
definition: any coral that belongs to the genus Pseudodiploria.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: coral
narrower: Pseudodiploria strigosa
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

sclerosponge
type: Concept
definition: an identifiable organism that belongs to kingdom Animalia, phylum Porifera, class Demospongiae.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: sponge
narrower: Astrosclera sp.
narrower: Ceratoporella sp.
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

coralline algae
type: Concept
definition: an identifiable organism that belongs to the kingdom Plantae and order Corallinales.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: organism
narrower: Clathromorphum sp.
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

day of month
type: Concept
definition: an age unit of day position in the month, starting with the first day of the month.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: age unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

month of year
type: Concept
definition: an age unit of month position in the year, starting with January.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: age unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

Trilobatus sp.
type: Concept
definition: any foraminifer that belongs to the genus Trilobatus.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: planktic foraminifer
narrower: Trilobatus sacculifer
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

Pulleniatina sp.
type: Concept
definition: any foraminifer that belongs to the genus Pulleniatina.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: planktic foraminifer
narrower: Pulleniatina obliquiloculata
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

single isotope concentration
type: Concept
definition: a measurement of the concentration of a single isotope.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: isotope
narrower: 10Be
narrower: 137Cs
narrower: 13C
narrower: 14C
narrower: 210Pb
narrower: 230Th
narrower: 231Pa
narrower: 232Th
narrower: 234U
narrower: 238U
narrower: 32S
narrower: 36Cl
narrower: 3H
narrower: 3He
narrower: 4He
narrower: 7Be
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

isotope
type: Concept
definition: a measure of chemical composition that relates to variants of a given element that differ in neutron number.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: chemical composition
narrower: isotope ratio
narrower: isotopic fractionation factor
narrower: single isotope concentration
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

C37 alkenone
type: Concept
definition: an alkenone that contains 37 carbon atoms.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: alkenone
narrower: C37:2 alkenone
narrower: C37:3 alkenone
narrower: C37:4 alkenone
related: instrumental
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

C37:2 alkenone
type: Concept
definition: a C37 alkenone that is di-unsaturated.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: C37 alkenone
related: instrumental
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

C37:3 alkenone
type: Concept
definition: a C37 alkenone that is tri-unsaturated.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: C37 alkenone
related: instrumental
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

C37:4 alkenone
type: Concept
definition: a C37 alkenone that is tetra-unsaturated.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: C37 alkenone
related: instrumental
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

C37 alkenone
type: Concept
definition: an alkenone that contains 37 carbon atoms.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: alkenone
narrower: C37:2 alkenone
narrower: C37:3 alkenone
narrower: C37:4 alkenone
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

C38 alkenone
type: Concept
definition: an alkenone that contains 38 carbon atoms.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: alkenone
narrower: C38:2 alkenone
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

C37:2 alkenone
type: Concept
definition: a C37 alkenone that is di-unsaturated.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: C37 alkenone
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

C37:3 alkenone
type: Concept
definition: a C37 alkenone that is tri-unsaturated.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: C37 alkenone
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

C37:4 alkenone
type: Concept
definition: a C37 alkenone that is tetra-unsaturated.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: C37 alkenone
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

C38:2 alkenone
type: Concept
definition: a C38 alkenone that is di-unsaturated.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: C38 alkenone
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

plant macrofossils
type: Concept
definition: a data type that includes measurements of plant remains large enough to be observed without a microscope.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: data type
related: guard cell length
related: guard cell width
related: stomatal density
related: stomatal index
related: stomatal size
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

C16 n-alkanoic acid
type: Concept
definition: a n-alkanoic acid with the formula C15H31COOH.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: n-alkanoic acid
related: loess and paleosol
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

million year
type: Concept
definition: a duration unit that is equal to 10^[6] years.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: duration unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

horizontal displacement
type: Concept
definition: a formation property that quantifies the amount of horizontal movement of a deposit (e.g., ice) since its original emplacement.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: formation property
related: ice cores
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

grain size class
type: Concept
definition: the abundance or concentration of particles of specified grain size classes.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: grain size
narrower: clay
narrower: grain size index
narrower: granule
narrower: gravel
narrower: pebble
narrower: sand
narrower: silt
related: ice cores
related: loess and paleosol
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

grain size parameter
type: Concept
definition: a parameter that describes a specific aspect of a grain size frequency distribution.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: grain size
narrower: grain size beta
narrower: grain size delta variate
narrower: grain size kurtosis
narrower: grain size mean
narrower: grain size median
narrower: grain size mode
narrower: grain size skewness
narrower: grain size standard deviation
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

C17 n-alkanoic acid
type: Concept
definition: a n-alkanoic acid with the formula C16H33COOH.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: n-alkanoic acid
related: loess and paleosol
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

C18 n-alkanoic acid
type: Concept
definition: a n-alkanoic acid with the formula C17H35COOH.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: n-alkanoic acid
related: loess and paleosol
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

C19 n-alkanoic acid
type: Concept
definition: a n-alkanoic acid with the formula C18H37COOH.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: n-alkanoic acid
related: loess and paleosol
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

C20 n-alkanoic acid
type: Concept
definition: a n-alkanoic acid with the formula C19H39COOH.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: n-alkanoic acid
related: loess and paleosol
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

C21 n-alkanoic acid
type: Concept
definition: a n-alkanoic acid with the formula C20H41COOH.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: n-alkanoic acid
related: loess and paleosol
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

C23 n-alkanoic acid
type: Concept
definition: a n-alkanoic acid with the formula C22H45COOH.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: n-alkanoic acid
related: loess and paleosol
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

C25 n-alkanoic acid
type: Concept
definition: a n-alkanoic acid with the formula C24H49COOH.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: n-alkanoic acid
related: loess and paleosol
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

C31 n-alkanoic acid
type: Concept
definition: a n-alkanoic acid with the formula C30H61COOH.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: n-alkanoic acid
related: loess and paleosol
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

C33 n-alkanoic acid
type: Concept
definition: a n-alkanoic acid with the formula C32H65COOH.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: n-alkanoic acid
related: loess and paleosol
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

temperature variable
type: Concept
definition: an earth system variable that quantifies the degree or intensity of heat present in a material.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: earth system variable
narrower: maximum temperature
narrower: minimum temperature
narrower: potential temperature
narrower: temperature
narrower: temperature index
narrower: temperature tendency
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

temperature index
type: Concept
definition: a temperature variable that combines temperature information to yield an indicator of hot or cold conditions.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: temperature variable
narrower: growing degree days
narrower: non-freezing days
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

hydrocarbon
type: Concept
definition: an organic compound that consists of carbon and hydrogen only.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: organic compound
narrower: alkane
narrower: alkene
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

C21 n-alkane
type: Concept
definition: a n-alkane with the chemical formula C21H44.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: n-alkane
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

C22 n-alkane
type: Concept
definition: a n-alkane with the chemical formula C22H46.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: n-alkane
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

C23 n-alkane
type: Concept
definition: a n-alkane with the chemical formula C23H48.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: n-alkane
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

C24 n-alkane
type: Concept
definition: a n-alkane with the chemical formula C24H50.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: n-alkane
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

C26 n-alkane
type: Concept
definition: a n-alkane with the chemical formula C26H54.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: n-alkane
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

C28 n-alkane
type: Concept
definition: a n-alkane with the chemical formula C28H58.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: n-alkane
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

C30 n-alkane
type: Concept
definition: a n-alkane with the chemical formula C30H62.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: n-alkane
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

C34 n-alkane
type: Concept
definition: a n-alkane with the chemical formula C34H70.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: n-alkane
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

C35 n-alkane
type: Concept
definition: a n-alkane with the chemical formula C35H72.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: n-alkane
related: paleoceanography
related: paleolimnology
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

organic hydroxy compound
type: Concept
definition: an organic compound having at least one hydroxy group attached to a carbon atom.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: organic compound
narrower: alcohol
narrower: sterol
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

organooxygen compound
type: Concept
definition: an organic compound that contains at least one carbon-oxygen bond.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: organic compound
narrower: acetic acid
narrower: amino acid
narrower: carbohydrate
narrower: ketone
narrower: lipid
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

inorganic compound
type: Concept
definition: a compound that either does not contain carbon, is of a non-biologic origin, cannot be found or incorporated into a living organism, or is one of a small class of simple molecules containing carbon (e.g., carbon dioxide, carbon monoxide).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: compound
narrower: borate ion
narrower: carbon dioxide
narrower: carbon monoxide
narrower: carbonate ion
narrower: hydrogen carbonate
narrower: nitrate
narrower: nitrous oxide
narrower: sulfate
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

compound
type: Concept
definition: a chemical that is composed of two or more elements.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: chemical composition
narrower: inorganic compound
narrower: organic compound
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

element or single-element molecule
type: Concept
definition: a measurement of a single element.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: chemical composition
narrower: dissolved inorganic carbon
narrower: nitrogen gas
narrower: oxygen gas
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

Globorotalia crassaformis
type: Concept
definition: a particular species of the genus Globorotalia.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: identified foraminifer
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

Globorotalia hirsuta
type: Concept
definition: a particular species of the genus Globorotalia.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: identified foraminifer
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

Globorotalia tumida
type: Concept
definition: a particular species of the genus Globorotalia.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: identified foraminifer
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

Neogloboquadrina incompta
type: Concept
definition: a particular species of the genus Neogloboquadrina.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: identified foraminifer
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

Pulleniatina obliquiloculata
type: Concept
definition: a particular species of the genus Pulleniatina.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: identified foraminifer
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

Cibicidoides kullenbergi
type: Concept
definition: a particular species of the genus Cibicidoides.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: identified foraminifer
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

Cibicidoides mundulus
type: Concept
definition: a particular species of the genus Cibicidoides.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: identified foraminifer
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

Cibicidoides pachyderma
type: Concept
definition: a particular species of the genus Cibicidoides.
alternative label: Cibicides pachyderma
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: identified foraminifer
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

Melonis affinis
type: Concept
definition: a particular species of the genus Melonis.
alternative label: Melonis barleeanus
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: identified foraminifer
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

Nuttallides umbonifera
type: Concept
definition: a particular species of the genus Nuttallides.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: identified foraminifer
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

Oridorsalis umbonatus
type: Concept
definition: a particular species of the genus Oridorsalis.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: identified foraminifer
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

electronic spectroscopy
type: Concept
definition: spectroscopy that probes the electronic degrees of freedom of an atom or molecule (Credit: Chemical Methods Ontology).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: spectroscopy
narrower: atomic spectroscopy
narrower: spectrophotometry
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

count per volume unit
type: Concept
definition: a concentration unit that is a simple count of the number of units of a given substance, as an agreed arbitrary amount (e.g., atoms, grains, tests), per a specific volume of sample (Credit: Units of measurement ontology).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: concentration unit
narrower: count per cubic centimeter
narrower: count per cubic meter
narrower: count per cubic millimeter
narrower: count per liter
narrower: count per milliliter
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

count per area unit
type: Concept
definition: a concentration unit that is a simple count of the number of units of a given substance, as an agreed arbitrary amount (e.g., atoms, grains, tests), per a specific area of sample.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: concentration unit
narrower: count per square centimeter
narrower: count per square meter
narrower: count per square micrometer
narrower: count per square millimeter
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

count per mass unit
type: Concept
definition: a concentration unit that is a simple count of the number of units of a given substance, as an agreed arbitrary amount (e.g., atoms, grains, tests), per a specific mass of sample.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: concentration unit
narrower: count per gram
narrower: count per kilogram
narrower: count per microgram
narrower: count per milligram
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

magnetic field strength unit
type: Concept
definition: an electromagnetic unit that is a standard measure of the strength of a magnetic field and that can be thought of as the strength of the field that is produced at the center of a single circular conductor with a one meter diameter carrying a steady current of 1 ampere.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: electromagnetic unit
narrower: ampere per meter
narrower: ampere per meter per kilogram
narrower: kiloampere per meter
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

electrical resistivity unit
type: Concept
definition: an electromagnetic unit that represents a standard measurement of how strongly a material opposes the flow of an electrical current.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: electromagnetic unit
narrower: ohm centimeter
narrower: ohm meter
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

light unit
type: Concept
definition: an electromagnetic unit which is a standard measure of the intensity of light (Credit: Units of measurement ontology).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: electromagnetic unit
narrower: gigajoule per square meter
narrower: langley per day
narrower: watt per square meter
narrower: watt per steradian
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

equivalent per mass unit
type: Concept
definition: a concentration unit that is the amount of solute that reacts with an arbitrary amount of another substance in a given chemical reaction (e.g., in an acid-base or a oxidation-reduction reaction) per mass amount of solution.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: concentration unit
narrower: microequivalent per kilogram
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

equivalent per volume unit
type: Concept
definition: a concentration unit that is the amount of solute that reacts with an arbitrary amount of another substance in a given chemical reaction (e.g., in an acid-base or a oxidation-reduction reaction) per volume amount of solution.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: concentration unit
narrower: microequivalent per liter
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

month
type: Concept
definition: a duration unit which is approximately equal to the length of time of one of cycle of the moon's phases which in science is taken to be equal to 30 days (Credit: Units of measurement ontology).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: duration unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

hour
type: Concept
definition: a duration unit which is equal to 3600 seconds or 60 minutes (Credit: Units of measurement ontology).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: duration unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

magnetic moment unit
type: Concept
definition: an electromagnetic unit that is a standard measurement of the intensity of magnetization of a material.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: electromagnetic unit
narrower: ampere square meter per kilogram
narrower: milliampere square meter per kilogram
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

length per time unit
type: Concept
definition: a rate unit that is a standard measure of a linear distance of movement or accumulation of material per unit time.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: rate unit
narrower: centimeter per kiloyear
narrower: centimeter per second
narrower: centimeter per year
narrower: knot
narrower: meter per kiloyear
narrower: meter per million years
narrower: meter per second
narrower: meter per year
narrower: micrometer per year
narrower: millimeter per day
narrower: millimeter per month
narrower: millimeter per year
narrower: year per centimeter
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

mass per area per time unit
type: Concept
definition: a rate unit that is a standard measure of the accumulation or flow of mass per unit area per time.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: rate unit
narrower: gram per square centimeter per kiloyear
narrower: gram per square centimeter per year
narrower: gram per square meter per kiloyear
narrower: gram per square meter per year
narrower: kilogram per square meter per second
narrower: kilogram per square meter per year
narrower: microgram per square centimeter per kiloyear
narrower: microgram per square centimeter per year
narrower: microgram per square meter per day
narrower: microgram per square meter per year
narrower: milligram per square centimeter per kiloyear
narrower: milligram per square centimeter per year
narrower: milligram per square meter per year
narrower: nanogram per square centimeter per kiloyear
narrower: nanogram per square centimeter per year
narrower: nanogram per square meter per day
narrower: picogram per square centimeter per year
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

mole per area per time unit
type: Concept
definition: a rate unit that is a standard measure of the accumulation or flow of a mole of material per unit area per time.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: rate unit
narrower: micromole per square centimeter per kiloyear
narrower: micromole per square meter per second
narrower: millimole per square centimeter per kiloyear
narrower: millimole per square meter per second
narrower: mole per square meter per second
narrower: mole per square meter per year
narrower: mole per square meter per year per microatmosphere
narrower: nanomole per square centimeter per kiloyear
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

count per time unit
type: Concept
definition: a rate unit that is a standard measure of the occurrence of a material as indicated by a simple count per unit time.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: rate unit
narrower: count per century
narrower: count per kiloyear
narrower: count per minute
narrower: count per month
narrower: count per second
narrower: count per year
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

count per mass per time unit
type: Concept
definition: a rate unit that is a standard measure of the count of a material per mass of sample per time.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: rate unit
narrower: count per gram per second
narrower: count per gram per year
narrower: count per kilogram per hour
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

count per area per time unit
type: Concept
definition: a rate unit that is a standard measure of the occurrence of a counted material per area per time.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: rate unit
narrower: count per square centimeter per kiloyear
narrower: count per square centimeter per second
narrower: count per square centimeter per year
narrower: count per square meter per day
narrower: count per square meter per kiloyear
narrower: count per square meter per second
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

volume per time unit
type: Concept
definition: a rate unit that is a standard measure of the accumulation or flow of volume over a unit time.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: rate unit
narrower: cubic centimeter per second
narrower: cubic foot per second
narrower: cubic meter per second
narrower: cubic meter per year
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

mass per time unit
type: Concept
definition: a rate unit that is a standard measure of the flow or accumulation of mass per unit time.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: rate unit
narrower: gigaton per century
narrower: gigaton per year
narrower: kilogram per second
narrower: microgram per day
narrower: teragram per year
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

volume per area per time unit
type: Concept
definition: a rate unit that is a standard measure of the accumulation or flow of volume per unit area per time.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: rate unit
narrower: cubic centimeter per square centimeter per kiloyear
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

specific energy unit
type: Concept
definition: a unit that is a standard measure of energy per unit mass.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: unit
narrower: square meter per square second
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

area per area per time unit
type: Concept
definition: a rate unit that is a standard measure of the area of a material per unit area of sample per time.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: rate unit
narrower: square micrometer per square centimeter per year
narrower: square millimeter per square centimeter per year
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

temperature per time unit
type: Concept
definition: a rate unit that is a standard measure of the change in temperature of a substance per unit time.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: rate unit
narrower: degree Celsius per second
narrower: kelvin meter per second
narrower: kelvin per century
narrower: kelvin per day
narrower: kelvin per second
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

phenological event
type: Concept
definition: an ecosystem variable that is a periodic animal or plant life cycle event that is influenced by climate and other habitat factors (Credit: Wikipedia).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: ecosystem phenomenon
narrower: grain harvest date
narrower: grape harvest date
related: climate reconstructions
related: historical
related: tree ring
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

grain harvest date
type: Concept
definition: a phenological event that is the timing of a grain harvest.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: phenological event
related: historical
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

grape harvest date
type: Concept
definition: a phenological event that is the timing of the grape harvest.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: phenological event
related: historical
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

ice break-up date
type: Concept
definition: a cryospheric quantity that is the timing of the onset of ice break-up on a body of water such as a river, lake, or ocean.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: cryospheric quantity
related: historical
related: instrumental
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

snowfall
type: Concept
definition: the hydroclimatic rate of precipitation in the form of ice crystals.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: precipitation
narrower: convective snowfall
narrower: large-scale snowfall
related: historical
related: instrumental
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

surface pressure
type: Concept
definition: a pressure variable that is the atmospheric pressure at the earth's surface at a given location and time.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: pressure variable
related: historical
related: instrumental
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

wind direction
type: Concept
definition: a velocity variable that is the direction of the wind at an unspecified height in the atmosphere.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: velocity variable
related: historical
related: instrumental
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

societal event
type: Concept
definition: an earth system variable that relates to the occurrence of a event within human society, often as a consequence of weather or climate.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: earth system variable
related: historical
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

degree Fahrenheit
type: Concept
definition: a temperature unit which is equal to 5/9ths of a kelvin. Negative 40 degrees Fahrenheit is equal to negative 40 degrees Celsius (Credit: Units of measurement ontology)
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: temperature unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

watt per square meter
type: Concept
definition: a light unit which measures irradiance and which is equal to 1 watt of radiant power incident per one square meter surface area (Credit: Units of measurement ontology).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: light unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

evaporation
type: Concept
definition: the hydroclimatic rate of water transfer to the atmosphere from soil, waterbodies, and canopy interception, excluding transpiration from plants.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: hydroclimate rate
related: climate reconstructions
related: instrumental
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

Northern Oscillation Index
type: Concept
definition: a circulation index that is calculated as the difference in sea level pressure anomalies at the North Pacific High and at Darwin, Australia.
alternative label: NOI
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: circulation index
related: climate reconstructions
related: instrumental
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

burned area
type: Concept
definition: an ecosystem quantity that measures the area or fractional area of vegetated land burned by a wildfire.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: ecosystem quantity
related: climate reconstructions
related: instrumental
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

hour of day
type: Concept
definition: an age unit of hour position in the day, starting with midnight.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: age unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

knot
type: Concept
definition: a length per time unit that is equivalent to one nautical mile per hour, which is approximately 0.51444 meters per second.
alternative label: kn
alternative label: kt
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: length per time unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

megaliter
type: Concept
definition: a volume unit which is equal to one million liters or 10^[6] L.
alternative label: ML
alternative label: Ml
alternative label: megalitre
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: volume unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

microsiemens
type: Concept
definition: an electrical conduction unit which is equal to one millionth of a siemens, or 10^[-6] siemens.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: electrical conduction unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

ohm centimeter
type: Concept
definition: an electrical resistivity unit that is the resistivity of a material multiplied by the distance across which an electrical current is applied measured in centimeters.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: electrical resistivity unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

photosynthetically active radiation
type: Concept
definition: a radiative flux that is the amount of light available for photosynthesis, which is generally the sum of light (photons) in the wavelength range of 400 to 700 nanometers per area per time.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: radiative flux variable
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

micromole per square meter per second
type: Concept
definition: a mole per area per time unit that is one millionth of a mole, or 10^[-6] mole, per one square meter per one second.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: mole per area per time unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

sigma-theta
type: Concept
definition: the density of seawater that is calculated using in situ salinity and potential temperature, but pressure equal to zero rather than the in situ pressure, and 1000 kilogram per cubic meter is subtracted. Also defined as the potential density a parcel of seawater would have if raised to the surface adiabatically.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: density
related: instrumental
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

potential temperature
type: Concept
definition: the temperature that a parcel of fluid would have if brought adiabatically to a reference pressure.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: temperature variable
narrower: air potential temperature
narrower: sea water potential temperature
related: instrumental
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

sigma-t
type: Concept
definition: the density of seawater that is calculated using in situ temperature and salinity, but pressure equal to zero rather than the in situ pressure, and 1000 kilogram per cubic meter is subtracted. Also defined as the density a parcel of seawater would have if raised to the surface.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: density
related: instrumental
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

borate ion
type: Concept
definition: any inorganic compound that is formally derived from boric acid.
alternative label: BO3
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: inorganic compound
related: instrumental
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

chlorofluorocarbon
type: Concept
definition: an organochlorine compound derived from methane, ethane or propane that contains atoms of carbon, chlorine, and fluorine only.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: organohalogen compound
narrower: chlorofluorocarbon-11
narrower: chlorofluorocarbon-12
related: instrumental
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

chlorofluorocarbon-11
type: Concept
definition: a chlorofluorocarbon with the formula CCl3F.
alternative label: CFC-11
alternative label: trichlorofluoromethane
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: chlorofluorocarbon
related: instrumental
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

chlorofluorocarbon-12
type: Concept
definition: a chlorofluorocarbon with the formula CCl2F2.
alternative label: CFC-12
alternative label: dichlorodifluoromethane
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: chlorofluorocarbon
related: instrumental
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

organohalogen compound
type: Concept
definition: an organic compound containing at least one carbon-halogen bond.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: organic compound
narrower: chlorofluorocarbon
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

dissolved inorganic carbon
type: Concept
definition: the sum of all inorganic carbon species dissolved in a solution. The inorganic carbon species include carbon dioxide, carbonic acid, bicarbonate anion, and carbonate.
alternative label: DIC
alternative label: total CO2
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: inorganic carbon
related: instrumental
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

alkalinity
type: Concept
definition: a solution property that is a measure of the amount of bases in a solution that can be converted to uncharged species by a strong acid (Credit: Wikipedia).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: solution property
related: climate reconstructions
related: instrumental
related: paleoceanography
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

dissolved oxygen
type: Concept
definition: the amount of gaseous oxygen dissolved in water.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: oxygen gas
related: instrumental
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

calcite saturation state
type: Concept
definition: a solution property that is defined as the product of the concentrations of dissolved calcium and carbonate ions in seawater divided by the product of calcite at equilibrium.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: solution property
related: instrumental
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

apparent oxygen utilization
type: Concept
definition: a solution property that is the difference between the measured dissolved oxygen concentration and its equilibrium saturation concentration in water with the same physical and chemical properties (Credit: BCO-DMO).
alternative label: AOU
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: solution property
related: instrumental
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

dissociation constant
type: Concept
definition: a solution property expressing the extent to which a particular substance in solution is dissociated into ions, equal to the product of the concentrations of the respective ions divided by the concentration of the undissociated molecule.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: solution property
related: instrumental
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

Upwelling Index
type: Concept
definition: a circulation index that is a measure of the volume of water upwelling in the ocean.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: circulation index
related: instrumental
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

volume per time per length unit
type: Concept
definition: a rate unit which is a standard measure of the accumulation or flow of volume per time associated with a particular length scale.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: rate unit
narrower: cubic meter per second per hundred meters
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

cubic meter per second per hundred meters
type: Concept
definition: a volume per time per length unit that is cubic meters per second per one hundred meters, often used to measure a rate of coastal upwelling per one hundred meters of coastline.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: volume per time per length unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

isotopic fractionation factor
type: Concept
definition: a measurement of the partitioning of isotopes that occurs during one or more physical or biological processes such as a chemical reaction or phase change.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: isotope
narrower: delta 13C photosynthetic fractionation factor
narrower: delta 2H apparent fractionation factor
narrower: delta 2H enrichment factor
narrower: physiological scaling parameter
created: 2018-03-26 00:00:00.0
modified: 2020-06-01 15:17:14.0

delta 2H apparent fractionation factor
type: Concept
definition: a measurement of the difference in hydrogen isotopic composition between two phases or two materials and that represents the sum of many individual fractionations during physical and biochemical processes. This quantity is dimensionless and is typically calculated as [(delta 2Ha/1000 + 1)/(delta 2Hb/1000 + 1) - 1 ] * 1000 where a and b represent the product and the reactant, respectively.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: isotopic fractionation factor
related: instrumental
created: 2018-03-26 00:00:00.0
modified: 2020-06-01 15:09:39.0

bedrock elevation
type: Concept
definition: a cryospheric quantity that is the elevation of the surface of bedrock under an ice sheet or glacier, measured relative to some datum.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: cryospheric quantity
related: instrumental
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

molar mass unit
type: Concept
definition: a unit which is a standard measure of the mass of a homogeneous substance containing 6.02 x 10^[23] atoms or molecules (Credit: Units of measurement ontology).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: unit
narrower: kilogram per mole
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

kilogram per mole
type: Concept
definition: a molar mass unit which is equal to one kilogram of mass of one mole of chemical element or chemical compound (Credit: Units of measurement ontology).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: molar mass unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

insect
type: Concept
definition: an identifiable organism that belongs to the kingdom Animalia, phylum Arthropoda, class Insecta.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: organism
narrower: identified insect
narrower: insect index
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

identified insect
type: Concept
definition: an insect that has been identified taxonomically.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: insect
narrower: identified beetle
narrower: identified midge
related: insect
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

identified beetle
type: Concept
definition: an organism belonging to the Order Coleoptera that has been identified taxonomically.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: identified insect
related: insect
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

insect index
type: Concept
definition: a measurement of insects, such as a ratio or count, that is derived from a series of observations and that is used as an indicator or measure.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: insect
narrower: midge index
related: insect
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

surface downwelling clear-sky longwave radiation
type: Concept
definition: the radiative flux that is the amount of longwave (thermal) radiation from above that is measured at the lower boundary of the atmosphere under the hypothetical condition of a cloud-free sky.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: radiative flux variable
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

surface downwelling longwave radiation
type: Concept
definition: the radiative flux that is the amount of longwave (thermal) radiation from above that is measured at the lower boundary of the atmosphere.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: radiative flux variable
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

surface downwelling clear-sky shortwave radiation
type: Concept
definition: the radiative flux that is the amount of shortwave (solar) radiation from above that is measured at the lower boundary of the atmosphere under the hypothetical condition of a cloud-free sky.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: radiative flux variable
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

surface net downward longwave radiation
type: Concept
definition: a radiative flux that is the difference between longwave radiation from above (downwelling) and longwave radiation from below (upwelling) that is measured at the lower boundary of the atmosphere.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: radiative flux variable
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

surface net downward clear-sky longwave radiation
type: Concept
definition: a radiative flux that is the difference between longwave radiation from above (downwelling) and longwave radiation from below (upwelling) that is measured at the lower boundary of the atmosphere under the hypothetical condition of a cloud-free sky.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: radiative flux variable
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

surface net downward shortwave radiation
type: Concept
definition: a radiative flux that is the difference between shortwave radiation from above (downwelling) and shortwave radiation from below (upwelling) that is measured at the lower boundary of the atmosphere.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: radiative flux variable
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

surface net downward clear-sky shortwave radiation
type: Concept
definition: a radiative flux that is the difference between shortwave radiation from above (downwelling) and shortwave radiation from below (upwelling) that is measured at the lower boundary of the atmosphere under the hypothetical condition of a cloud-free sky.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: radiative flux variable
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

surface net downward radiation
type: Concept
definition: a radiative flux that is the difference between shortwave+longwave radiation from above (downwelling) and shortwave+longwave radiation from below (upwelling) that is measured at the lower boundary of the atmosphere.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: radiative flux variable
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

surface net upward longwave radiation
type: Concept
definition: a radiative flux that is the difference between longwave radiation from below (upwelling) and longwave radiation from above (downwelling) that is measured at the lower boundary of the atmosphere.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: radiative flux variable
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

surface upwelling longwave radiation
type: Concept
definition: a radiative flux that is the amount of longwave (thermal) radiation from below that is measured at the lower boundary of the atmosphere.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: radiative flux variable
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

surface upwelling clear-sky longwave radiation
type: Concept
definition: a radiative flux that is the amount of longwave (thermal) radiation from below that is measured at the lower boundary of the atmosphere under the hypothetical condition of a cloud-free sky.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: radiative flux variable
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

surface upwelling shortwave radiation
type: Concept
definition: a radiative flux that is the amount of shortwave (solar) radiation from below that is measured at the lower boundary of the atmosphere.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: radiative flux variable
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

surface upwelling clear-sky shortwave radiation
type: Concept
definition: a radiative flux that is the amount of shortwave (solar) radiation from below that is measured at the lower boundary of the atmosphere under the hypothetical condition of a cloud-free sky.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: radiative flux variable
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

top-of-atmosphere net downward longwave radiation
type: Concept
definition: a radiative flux that is the difference between longwave radiation from above (downwelling) and longwave radiation from below (upwelling) that is measured at the top of the atmosphere.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: radiative flux variable
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

top-of-atmosphere net downward radiation
type: Concept
definition: a radiative flux that is the difference between shortwave+longwave radiation from above (downwelling) and shortwave+longwave radiation from below (upwelling) that is measured at the top of the atmosphere.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: radiative flux variable
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

top-of-atmosphere net downward shortwave radiation
type: Concept
definition: a radiative flux that is the difference between shortwave radiation from above (downwelling) and shortwave radiation from below (upwelling) that is measured at the top of the atmosphere.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: radiative flux variable
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

top-of-atmosphere net downward clear-sky longwave radiation
type: Concept
definition: a radiative flux that is the difference between longwave radiation from above (downwelling) and longwave radiation from below (upwelling) that is measured at the top of the atmosphere under the hypothetical condition of a cloud-free sky.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: radiative flux variable
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

top-of-atmosphere net downward clear-sky shortwave radiation
type: Concept
definition: a radiative flux that is the difference between shortwave radiation from above (downwelling) and shortwave radiation from below (upwelling) that is measured at the top of the atmosphere under the hypothetical condition of a cloud-free sky.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: radiative flux variable
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

top-of-atmosphere net upward longwave radiation
type: Concept
definition: a radiative flux that is the difference between longwave radiation from below (upwelling) and longwave radiation from above (downwelling) that is measured at the top of the atmosphere.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: radiative flux variable
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

top-of-atmosphere net upward clear-sky longwave radiation
type: Concept
definition: a radiative flux that is the difference between longwave radiation from below (upwelling) and longwave radiation from above (downwelling) that is measured at the top of the atmosphere under the hypothetical condition of a cloud-free sky.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: radiative flux variable
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

top-of-atmosphere net upward shortwave radiation
type: Concept
definition: a radiative flux that is the difference between shortwave radiation from below (upwelling) and shortwave radiation from above (downwelling) that is measured at the top of the atmosphere.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: radiative flux variable
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

top-of-atmosphere outgoing longwave radiation
type: Concept
definition: a radiative flux that is the amount of longwave (thermal) radiation from below that is measured at the top of the atmosphere.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: radiative flux variable
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

top-of-atmosphere outgoing clear-sky longwave radiation
type: Concept
definition: a radiative flux that is the amount of longwave (thermal) radiation from below that is measured at the top of the atmosphere under the hypothetical condition of a cloud-free sky.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: radiative flux variable
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

top-of-atmosphere outgoing shortwave radiation
type: Concept
definition: a radiative flux that is the amount of shortwave (solar) radiation from below that is measured at the top of the atmosphere.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: radiative flux variable
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

top-of-atmosphere outgoing clear-sky shortwave radiation
type: Concept
definition: a radiative flux that is the amount of shortwave (solar) radiation from below that is measured at the top of the atmosphere under the hypothetical condition of a cloud-free sky.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: radiative flux variable
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

planetary albedo
type: Concept
definition: a variable impacting radiative fluxes that is the ratio of reflected light to incident light at the top of the atmosphere.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: radiative flux variable
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

northward wind speed
type: Concept
definition: a measure of wind speed that is the magnitude of the northward vector component of wind at some level in the atmosphere.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: wind speed
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

eastward wind speed
type: Concept
definition: a measure of wind speed that is the magnitude of the eastward vector component of wind at some level in the atmosphere.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: wind speed
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

vertical pressure velocity
type: Concept
definition: a velocity variable that is the upward component of air velocity when air pressure is being used as the vertical coordinate. If the vertical air velocity is upwards, it is negative when expressed as a tendency of air pressure; downwards is positive.
alternative label: omega
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: velocity variable
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

rainfall
type: Concept
definition: the hydroclimatic rate of precipitation in the form of liquid water.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: precipitation
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

large-scale precipitation
type: Concept
definition: the hydroclimatic rate of precipitation (rain+snow) that is grid-cell in scale and that originates from the model cloud scheme.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: precipitation
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

convective precipitation
type: Concept
definition: the hydroclimatic rate of precipitation (rain+snow) that originates from convective storms parameterized by the model convection scheme.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: precipitation
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

large-scale snowfall
type: Concept
definition: snowfall that is grid-cell in scale and that originates from the model cloud scheme.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: snowfall
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

convective snowfall
type: Concept
definition: snowfall that originates from convective storms parameterized by the model convection scheme.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: snowfall
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

sunspot number
type: Concept
definition: an forcing variable that is an index of the activity of the sun, measured through counts of individual and grouped sunspots on the visible disk of the sun.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: forcing variable
related: climate forcing
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

solar modulation potential
type: Concept
definition: a forcing variable that is used to approximate the modulation of galactic cosmic rays by the sun's activity as they pass through the heliosphere.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: forcing variable
related: climate forcing
related: instrumental
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

cosmic ray-induced ionization
type: Concept
definition: a forcing variable that measures the ionization of the earth's atmosphere by galactic cosmic rays.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: forcing variable
related: climate forcing
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

cosmic ray flux
type: Concept
definition: a forcing variable that measures the flux of high-energy radiation mainly originating outside the solar system into the earth's atmosphere.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: forcing variable
related: climate forcing
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

delta 13C photosynthetic fractionation factor
type: Concept
definition: an isotope fractionation factor for delta 13C that represents the fractionation that occurs during photosynthesis. This quantity is typically calculated as [(delta 13Ca/1000 + 1)/(delta 13Cb/1000 + 1) - 1 ] * 1000 where a and b represent the product and the reactant, respectively.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: isotopic fractionation factor
related: paleoceanography
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

count per gram per second
type: Concept
definition: a count per mass per time unit that is a simple count of a substance per one thousandth of a kilogram, or 10^[-3] kg, of sample per second.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: count per mass per time unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

cubic millimeter
type: Concept
definition: a volume unit which is equal to one billionth of a cubic meter or 10^[-9] m^[3].
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: volume unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

gigajoule per square meter
type: Concept
definition: a light unit that measures integrated irradiance and which is equal to one billion joules, or 10^[9] J, of radiant energy per one square meter surface area.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: light unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

kilogram per square meter per second
type: Concept
definition: a mass per area per time unit that is one kilogram per one square meter, per one second.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: mass per area per time unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

langley per day
type: Concept
definition: a light unit which is equal to one thermochemical calorie per square centimeter per day, and to about 0.484583 watt per square meter.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: light unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

megavolt
type: Concept
definition: an electric potential difference unit which is equal to one million volts or 10^[6] V (Credit: Units of measurement ontology).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: electric potential difference unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

forcing variable
type: Concept
definition: an earth system variable that quantifies a forcing on the climate system that is external.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: earth system variable
narrower: anthropogenic aerosol forcing
narrower: cosmic ray flux
narrower: cosmic ray-induced ionization
narrower: greenhouse gas forcing
narrower: insolation
narrower: orbital parameter
narrower: solar irradiance
narrower: solar modulation potential
narrower: sunspot number
narrower: volcanic forcing
narrower: volcanic sulfate
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

volcanic sulfate
type: Concept
definition: a forcing variable that quantifies the atmospheric loading of sulfate from volcanism.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: forcing variable
related: climate forcing
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

volcanic forcing
type: Concept
definition: a forcing variable that quantifies the radiative forcing, often expressed in watt per square meter, of volcanism.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: forcing variable
related: climate forcing
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

greenhouse gas forcing
type: Concept
definition: a forcing variable that quantifies the radiative forcing, often expressed in watt per square meter, of atmospheric greenhouse gases.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: forcing variable
related: climate forcing
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:47.0

anthropogenic aerosol forcing
type: Concept
definition: a forcing variable that quantifies the radiative forcing, often expressed in watt per square meter, of anthropogenic aerosols.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: forcing variable
related: climate forcing
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

orbital parameter
type: Concept
definition: a forcing variable that quantifies an aspect of the earth's orbit (e.g., eccentricity, obliquity, precession).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: forcing variable
related: climate forcing
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

aerosol optical depth
type: Concept
definition: a variable impacting radiative fluxes that is the integral along the path of radiation of a volume scattering/absorption/attenuation coefficient for ambient aerosols. The radiative flux is reduced by a factor exp(-optical_depth) on traversing the path.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: radiative flux variable
related: climate forcing
related: instrumental
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

effective aerosol radius
type: Concept
definition: a radiative flux variable that is the area-weighted mean radius of aerosols in a sample.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: radiative flux variable
related: climate forcing
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

snow temperature
type: Concept
definition: the mean temperature at or below the surface of an ice sheet or glacier.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: temperature
related: ice cores
related: instrumental
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

sea water potential temperature
type: Concept
definition: the temperature that a parcel of sea water would have if brought adiabatically to a reference pressure, often the pressure at the ocean surface.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: potential temperature
related: instrumental
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

air potential temperature
type: Concept
definition: the temperature that a parcel of air would have if brought adiabatically to a reference pressure, often 1 bar (100 kPa).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: potential temperature
related: instrumental
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

lake water
type: Concept
definition: a hydrologic material that consists of water sampled from a lake.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: hydrologic material
related: instrumental
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

precipitation
type: Concept
definition: a hydrologic material that consists of rain, snow, sleet or hail that falls to the ground.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: hydrologic material
narrower: snow
related: instrumental
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

sea water
type: Concept
definition: a hydrologic material that consists of water sampled from any level of the ocean.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: hydrologic material
narrower: sea surface
related: instrumental
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

river water
type: Concept
definition: a hydrologic material that consists of water sampled from a river.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: hydrologic material
related: instrumental
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

sea surface
type: Concept
definition: a hydrologic material that consists of water sampled from the surface of the ocean.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: sea water
related: instrumental
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

sediment pore water
type: Concept
definition: a hydrologic material that consists of water filling the pores of a sediment sample.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: hydrologic material
related: instrumental
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

borate ion
type: Concept
definition: any inorganic compound that is formally derived from boric acid.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: inorganic compound
related: instrumental
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

dissolved inorganic carbon
type: Concept
definition: the sum of all inorganic carbon species dissolved in a solution. The inorganic carbon species include carbon dioxide, carbonic acid, bicarbonate anion, and carbonate.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or single-element molecule
related: instrumental
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

reconstruction material
type: Concept
definition: a material that is used in a statistically-based climate reconstruction.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: material
narrower: biological assemblage
narrower: element or compound ratio
narrower: isotope ratio
narrower: multiple proxies
narrower: organic compound index
narrower: physical measurement
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

organic compound index
type: Concept
definition: a measurement of specific organic compounds, such as a ratio or count, that is derived from a series of observations and that is used as an indicator or measure of environmental conditions.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: reconstruction material
narrower: alkenone unsaturation index
narrower: glycerol dialkyl glycerol tetraether index
narrower: long-chain diol index
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

alkenone unsaturation index
type: Concept
definition: an organic compound index that compares the relative abundances of different alkenones in a sample.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: organic compound index
related: climate reconstructions
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

glycerol dialkyl glycerol tetraether index
type: Concept
definition: an organic compound index that compares the relative abundances of different glycerol dialkyl glycerol tetraethers in a sample.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: organic compound index
related: climate reconstructions
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

power unit
type: Concept
definition: a unit which is a standard measure power or the rate of doing work (Credit: Units of measurement ontology).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: unit
narrower: petawatt
narrower: watt
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

watt
type: Concept
definition: a power unit which is equal to the power used when work is done at the rate of 1 joule per second (Credit: Units of measurement ontology).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: power unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

petawatt
type: Concept
definition: a power unit which is equal to one quadrillion watts, or 10^[15] W.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: power unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

centimeter per second
type: Concept
definition: a length per time unit that is one hundredth of a meter, or 10^[-2] m, per second.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: length per time unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

count per square meter
type: Concept
definition: a count per area unit that applies to an area of one square meter.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: count per area unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

degree Celsius per second
type: Concept
definition: a temperature per time unit that is the change of one degree Celsius per one second.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: temperature per time unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

kelvin per day
type: Concept
definition: a temperature per time unit that is the change of one kelvin per one day.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: temperature per time unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

kelvin per second
type: Concept
definition: a temperature per time unit that is the change of one kelvin per one second.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: temperature per time unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

gigaton
type: Concept
definition: a mass unit that is one billion tons, or 10^[9] tons.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: mass unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

gram per square meter
type: Concept
definition: an area density unit which is equal to the mass of an object in grams, or 10^[-3] kg, per square meter.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: area density unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

kilogram per kilogram
type: Concept
definition: a mass fraction unit that measures the number of kilograms of one subcomponent of a sample relative to one kilogram of either another subcomponent or of the entire sample.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: mass fraction unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

kilogram per second
type: Concept
definition: a mass per time unit that is one thousand grams, or 10^[3] g, per one second.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: mass per time unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

kilogram per square meter
type: Concept
definition: an area density unit which is equal to the mass of an object in kilograms per square meter.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: area density unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

mole per cubic meter
type: Concept
definition: a molarity unit which expresses a concentration of a solution of one mole per one cubic meter of solvent.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: molarity unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

pressure per time unit
type: Concept
definition: a rate unit that is a standard measure of the change in pressure per unit time.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: rate unit
narrower: pascal per second
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

pascal per second
type: Concept
definition: a pressure per time unit that is one pascal per one second.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: pressure per time unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

dimensionless per time unit
type: Concept
definition: a rate unit that is a dimensionless quantity per unit time.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: rate unit
narrower: dimensionless per second
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

dimensionless per second
type: Concept
definition: a dimensionless per time unit that is a dimensionless quantity per one second.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: dimensionless per time unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

energy unit
type: Concept
definition: a unit which is a standard measure of the work done by a certain force (gravitational, electric, magnetic, force of inertia, etc) (Credit: Units of measurement ontology).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: unit
narrower: calorie
narrower: joule
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

calorie
type: Concept
definition: an energy unit that is the energy needed to raise the temperature of 1 gram of water through 1 degree Celsius, and that is equivalent to 4.1868 joules.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: energy unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

soil temperature
type: Concept
definition: the mean temperature at or below the soil surface.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: temperature
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

temperature tendency
type: Concept
definition: a temperature variable that quantifies the change in temperature per time.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: temperature variable
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

circulation variable
type: Concept
definition: an earth system variable that describes or quantifies motion and related properties in the atmosphere or ocean.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: earth system variable
narrower: circulation index
narrower: circulation length variable
narrower: kinetic energy dissipation
narrower: pressure variable
narrower: relative vorticity
narrower: surface stress
narrower: transport variable
narrower: velocity variable
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

barotropic streamfunction
type: Concept
definition: a transport variable of the ocean defined for latitude and longitude that quantifies the volume transport of water between two points.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: transport variable
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

wind divergence
type: Concept
definition: a velocity variable that measures the horizontal change in wind velocity through space.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: velocity variable
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

ice sheet x velocity
type: Concept
definition: an ice sheet velocity that is the magnitude of a vector component along the ice sheet grid x-axis, positive with increasing x, sometimes meaning in an eastward direction.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: ice sheet velocity
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

sea water x velocity
type: Concept
definition: a measure of sea water velocity that is the magnitude of a vector component along the ocean grid x-axis, positive with increasing x, and sometimes in an eastward direction.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: sea water velocity
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

sea ice x velocity
type: Concept
definition: a measure of sea ice velocity that is the magnitude of a vector component along the sea ice grid x-axis, positive with increasing x, and sometimes in an eastward direction.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: sea ice velocity
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

kinetic energy dissipation
type: Concept
definition: a circulation variable that is the measure of the dissipation of kinetic energy of a fluid within the earth system.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: circulation variable
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

meridional overturning streamfunction
type: Concept
definition: a transport variable that measures the circulation of the ocean defined for latitude and depth and obtained as the integral of the ocean velocity between the east and west boundaries of the basin and from the surface to a given depth.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: transport variable
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

ice sheet y velocity
type: Concept
definition: an ice sheet velocity that is the magnitude of a vector component along the ice sheet grid y-axis, positive with increasing y, sometimes meaning in a northward direction.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: ice sheet velocity
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

sea water y velocity
type: Concept
definition: a measure of sea water velocity that is the magnitude of a vector component along the ocean grid y-axis, positive with increasing y, and sometimes in an northward direction.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: sea water velocity
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

sea ice y velocity
type: Concept
definition: a measure of sea ice velocity that is the magnitude of a vector component along the sea ice grid y-axis, positive with increasing y, and sometimes in a northward direction.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: sea ice velocity
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

relative vorticity
type: Concept
definition: a circulation variable that is the vorticity, or spinning motion, of the velocity field of a fluid relative to the earth.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: circulation variable
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

ice sheet velocity
type: Concept
definition: a velocity variable that is the magnitude of a vector indicating ice sheet motion at some level.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: velocity variable
narrower: ice sheet x velocity
narrower: ice sheet y velocity
narrower: upward ice sheet velocity
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

sea water velocity
type: Concept
definition: a velocity variable that is the magnitude of a vector indicating sea water motion at some level in the ocean.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: velocity variable
narrower: sea water x velocity
narrower: sea water y velocity
narrower: upward sea water velocity
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

sea ice velocity
type: Concept
definition: a velocity variable that is the magnitude of a vector indicating sea ice motion.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: velocity variable
narrower: sea ice x velocity
narrower: sea ice y velocity
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

surface stress
type: Concept
definition: a circulation variable that is the downward flux of momentum at the lower boundary of the atmosphere.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: circulation variable
narrower: surface downward x stress
narrower: surface downward y stress
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

surface downward x stress
type: Concept
definition: a measure of surface stress that is the downward flux of momentum in the grid x direction, often eastward, at the lower boundary of the atmosphere, which accelerates the lower medium in the grid x direction and the upper medium in the negative grid x direction.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: surface stress
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

surface downward y stress
type: Concept
definition: a measure of surface stress that is the downward flux of momentum in the grid y direction, often northward, at the lower boundary of the atmosphere, which accelerates the lower medium in the grid y direction and the upper medium in the negative grid y direction.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: surface stress
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

upward sea water velocity
type: Concept
definition: the velocity of sea water in the vertical direction at some depth, with positive indicating upward movement.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: sea water velocity
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

upward ice sheet velocity
type: Concept
definition: an ice sheet velocity in the vertical direction at some depth, with positive indicating upward movement.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: ice sheet velocity
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

runoff
type: Concept
definition: the hydroclimatic rate that is the liquid water than drains from land and is the sum of surface runoff and subsurface drainage.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: hydroclimate rate
narrower: subsurface runoff
narrower: surface runoff
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

surface runoff
type: Concept
definition: the runoff that drains across the land surface.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: runoff
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

subsurface runoff
type: Concept
definition: the runoff that drains through the soil column.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: runoff
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

transpiration
type: Concept
definition: the hydroclimatic rate of water transfer from the land to the atmosphere from transpiration from plants.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: hydroclimate rate
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

specific humidity
type: Concept
definition: a hydroclimate ratio that is the mass fraction of water vapor in air.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: hydroclimate ratio
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

hydroclimate quantity
type: Concept
definition: a hydroclimate variable that quantifies some aspect of the concentration or distribution of water.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: hydroclimatic variable
narrower: cloud condensed water content
narrower: precipitable water
narrower: soil moisture
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

soil moisture
type: Concept
definition: a hydroclimate quantity that is the content of water in all phases present in a specified soil layer or vertically integrated from the bottom to the top of the soil column.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: hydroclimate quantity
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

precipitable water
type: Concept
definition: a hydroclimate quantity that is the vertical integral from the bottom to top of the atmosphere of water in all phases.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: hydroclimate quantity
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

cloud ice mixing ratio
type: Concept
definition: the hydroclimate ratio of the mass of ice within a parcel of air to the mass of dry air.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: hydroclimate ratio
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

cloud liquid water mixing ratio
type: Concept
definition: the hydroclimate ratio of the mass of liquid water within a parcel of air to the mass of dry air.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: hydroclimate ratio
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

cloud condensed water content
type: Concept
definition: a hydroclimate quantity that is the amount of condensed water, both liquid and ice, present in an atmospheric column or layer.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: hydroclimate quantity
narrower: cloud ice content
narrower: cloud liquid water content
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

cloud liquid water content
type: Concept
definition: the quantity of condensed water in the form of liquid water present in an atmospheric column or layer.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: cloud condensed water content
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

cloud ice content
type: Concept
definition: the quantity of condensed water in the form of ice present in an atmospheric column or layer.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: cloud condensed water content
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

sea ice volume
type: Concept
definition: a cryospheric quantity that is the volume of sea ice per specified area.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: cryospheric quantity
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

sea ice thickness
type: Concept
definition: a cryospheric quantity that is the vertical extent of sea ice.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: cryospheric quantity
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

cubic centimeter per second
type: Concept
definition: a volume per time unit that is one millionth of a cubic meter, or 10^[-6] m, per one second.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: volume per time unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

sverdrup
type: Concept
definition: a volume per time unit that is one million cubic meters, or 10^[6] cubic meters, per second.
alternative label: Sv
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: cubic meter per second
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:49.0

surface type
type: Concept
definition: sampling metadata that is the prescribed type (e.g., land, ocean, ice) at the bottom of the atmospheric column.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: sampling metadata
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

surface geopotential
type: Concept
definition: the sum of the specific gravitational potential energy relative to the geoid and the specific centripetal potential energy. This quantity yields surface elevation when divided by g.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: sampling metadata
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

ecosystem process
type: Concept
definition: an ecosystem variable that quantifies aspects of ecosystem functioning such as fluxes of energy or mass.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: ecosystem variable
narrower: biomass burning
narrower: denitrification
narrower: excretion
narrower: export
narrower: grazing
narrower: maximum stomatal conductance
narrower: mortality
narrower: nitrogen fixation
narrower: productivity
narrower: remineralization
narrower: soil respiration
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:54.0

grazing
type: Concept
definition: an ecosystem process variable that quantifies the consumption of biomass, for example the consumption of phytoplankton by zooplankton, and the related transfer of nutrients.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: ecosystem process
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

mortality
type: Concept
definition: an ecosystem process variable that quantifies the death rate, often expressed in terms of biomass per time, within a particular group of organisms.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: ecosystem process
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

nitrogen fixation
type: Concept
definition: an ecosystem process variable that quantifies the production of ammonia from nitrogen gas by nitrogen-fixing organisms, called diazotrophs.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: ecosystem process
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

denitrification
type: Concept
definition: an ecosystem process variable that quantifies the conversion of nitrate into gasesous compounds such as nitric oxide, nitrous oxide and molecular nitrogen which are then emitted to the atmosphere (Credit: Climate Forecast Standard Names).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: ecosystem process
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

excretion
type: Concept
definition: an ecosystem process variable that quantifies the excretion of waste products and its related nutrient cycling.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: ecosystem process
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

remineralization
type: Concept
definition: an ecosystem process variable that quantifies the the degradation of organic matter into inorganic forms of carbon, nitrogen, phosphorus and other micronutrients, which consumes oxygen and releases energy (Credit: Climate Forecast Standard Names).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: ecosystem process
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

export
type: Concept
definition: an ecosystem process variable that quantifies the long-term removal of nutrients from an ecosystem, for example by transportation.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: ecosystem process
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

ecosystem quantity
type: Concept
definition: an ecosystem variable that quantifies some aspect of the components of an ecosystem.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: ecosystem variable
narrower: C3 plants
narrower: C4 plants
narrower: burned area
narrower: canopy height
narrower: guard cell length
narrower: guard cell width
narrower: litter carbon
narrower: phytoplankton
narrower: plant available moisture
narrower: soil carbon
narrower: stomatal density
narrower: stomatal size
narrower: symbiont
narrower: vegetation carbon
narrower: zooplankton
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

canopy height
type: Concept
definition: an ecosystem quantity that is the vertical height above the surface of the plant or vegetation canopy.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: ecosystem quantity
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

litter carbon
type: Concept
definition: an ecosystem quantity that is the quantity of carbon contained in dead inorganic material in or above the soil.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: ecosystem quantity
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

soil carbon
type: Concept
definition: the quantity of carbon contained in a soil column or layer.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: ecosystem quantity
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

vegetation carbon
type: Concept
definition: the ecosystem quantity of carbon contained in plants, including grasses, shrubs, and trees.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: ecosystem quantity
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

ecosystem index
type: Concept
definition: a measurement of ecosystem quantities or properties, such as a ratio or count, that is derived from a series of observations and that is used as an indicator or measure.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: ecosystem variable
narrower: biome
narrower: diversity index
narrower: foliage projective cover
narrower: intrinsic water use efficiency
narrower: leaf area index
narrower: plant functional type
narrower: stomatal index
narrower: trophic position index
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

leaf area index
type: Concept
definition: an ecosystem index that characterizes plant canopies and that is calculated as the one-sided green leaf area per unit ground surface area (Credit: Wikipedia).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: ecosystem index
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

biomass burning
type: Concept
definition: an ecosystem process in which organic matter is burned by forest fires, etc and resulting in various chemical emissions.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: ecosystem process
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

soil respiration
type: Concept
definition: an ecosystem process that refers to the production of carbon dioxide when soil organisms, both decomposers and producers, respire.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: ecosystem process
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

phytoplankton
type: Concept
definition: an ecosystem quantity of autotrophic prokaryotic or eukaryotic algae that live near the water surface where there is sufficient light to support photosynthesis.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: ecosystem quantity
narrower: diazotroph
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

zooplankton
type: Concept
definition: the ecosystem quantity of plankton consisting of small animals near the surface of aquatic environments that consume phytoplankton.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: ecosystem quantity
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

diazotroph
type: Concept
definition: the quantity of phytoplankton of the phylum cyanobacteria distinct from other phytoplankton groups in their ability to fix nitrogen gas in addition to nitrate and ammonium.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: phytoplankton
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

ecosystem phenomenon
type: Concept
definition: an ecosystem variable that describes an occurrence or event that is relevant to an ecosystem.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: ecosystem variable
narrower: phenological event
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

ice sheet area
type: Concept
definition: a cryospheric quantity that is the horizontal extent of a glacier, ice-cap or ice-sheet resting on bedrock or an ice-shelf.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: cryospheric quantity
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

cryospheric variable
type: Concept
definition: an earth system variable that relates to those parts of the earth surface where water is in solid form.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: earth system variable
narrower: cryospheric index
narrower: cryospheric process
narrower: cryospheric quantity
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

cryospheric process
type: Concept
definition: a cryospheric variable that quantifies aspects of cryosphere dynamics or thermodynamics such as fluxes of energy or mass.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: cryospheric variable
narrower: ice mass loss
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

ice melt
type: Concept
definition: the ice mass loss from a glacier, ice-cap, ice-sheet, or ice-shelf through phase transformation to liquid water.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: ice mass loss
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-08-14 17:59:07.0

ice sheet thickness
type: Concept
definition: a cryospheric quantity that is the vertical extent of a glacier, ice-cap or ice-sheet resting on bedrock or an ice-shelf.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: cryospheric quantity
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

snow cover
type: Concept
definition: a cryospheric quantity that is a measure of the extent to which the land or sea ice surface is covered by snow.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: cryospheric quantity
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

snow depth
type: Concept
definition: a cryospheric quantity that is the vertical extent of snow on the land surface or sea ice, expressed as a measured depth rather than as a liquid water equivalent.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: cryospheric quantity
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

snow volume
type: Concept
definition: a cryospheric quantity that is the volume of snow covering the land surface or sea ice per given area.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: cryospheric quantity
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

7Be
type: Concept
definition: the concentration of a radioactive isotope of beryllium that has 3 neutrons and 4 protons.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: single isotope concentration
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

13C
type: Concept
definition: the concentration of a stable isotope of carbon with 7 neutrons and 6 protons.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: single isotope concentration
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:52.0

dissolved organic carbon
type: Concept
definition: the sum of all organic carbon species dissolved in a solution.
alternative label: DOC
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: organic carbon
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:46.0

dissolved organic nitrogen
type: Concept
definition: the sum of all organic nitrogen species dissolved in a solution.
alternative label: DON
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: nitrogen
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

dissolved organic phosphorus
type: Concept
definition: the sum of all organic phosphorus species dissolved in a solution.
alternative label: DOP
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: phosphorus
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

virtual salt flux
type: Concept
definition: a hydroclimatic rate that is the virtual (computational) flux of salt applied to fixed-volume ocean models to account for the salinification or dilution effects that precipitation, evaporation, river outflow, sea-ice etc can have through changing the volume of the ocean surface layer.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: hydroclimate rate
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

millimole per cubic meter
type: Concept
definition: a molarity unit which expresses a concentration of a solution of one thousandth of a mole, or 10^[-3] mole, per one cubic meter of solvent.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: molarity unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

mole per volume per time unit
type: Concept
definition: a rate unit that is a standard measure of the accumulation or flow of a mole of material per unit volume per time.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: rate unit
narrower: mole per cubic meter per second
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:51.0

mole per cubic meter per second
type: Concept
definition: a mole per volume per time unit that is one mole, per one cubic meter, per one second.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: mole per volume per time unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

kelvin meter per second
type: Concept
definition: a heat flux unit that is temperature in kelvin multiplied by a velocity in meter per second. This quantity can be converted to watt per square meter by using the specific heat capacity and density of the material.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: temperature per time unit
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

monthly
type: Concept
definition: a reconstructed seasonality that consists of values for each of the twelve months of the calendar year.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: seasonality
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

turbulent flux variable
type: Concept
definition: an energy flux variable that is largely driven by the wind.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: energy flux variable
narrower: latent heat flux
narrower: sensible heat flux
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

latent heat flux
type: Concept
definition: a turbulent heat flux that is the exchange of heat between the surface and the air on account of evaporation including sublimation.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: turbulent flux variable
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

sensible heat flux
type: Concept
definition: a turbulent heat flux that is the exchange of heat between the surface and the air by motion of air.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: turbulent flux variable
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

energy flux variable
type: Concept
definition: an energy variable that quantifies fluxes of energy, or properties affecting this, within the earth system.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: energy variable
narrower: radiative flux variable
narrower: surface heat flux
narrower: turbulent flux variable
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

surface net upward clear-sky longwave radiation
type: Concept
definition: a radiative flux that is the difference between longwave radiation from below (upwelling) and longwave radiation from above (downwelling) that is measured at the lower boundary of the atmosphere under the hypothetical condition of a cloud-free sky.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: radiative flux variable
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

shortwave cloud radiative effect
type: Concept
definition: a radiative flux that is the difference in shortwave radiative flux at the top of the atmosphere resulting from the presence of clouds, that is the difference between the net downward shortwave flux assuming clear sky conditions and the net downward shortwave flux with clouds present.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: radiative flux variable
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

longwave cloud radiative effect
type: Concept
definition: a radiative flux that is the difference in longwave radiative flux at the top of the atmosphere resulting from the presence of clouds, that is the difference between the outgoing longwave flux assuming clear sky conditions and the outgoing longwave flux with clouds present.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: radiative flux variable
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

atmospheric boundary layer thickness
type: Concept
definition: a circulation length variable that is the depth or height of the lowest part of the atmosphere that is directly influenced by contact with the earth surface.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: circulation length variable
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

northward ocean heat transport
type: Concept
definition: a transport variable that is the transport of heat by all processes in the ocean, and both sea water and sea ice, with northward transport being positive.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: transport variable
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:48.0

northward ocean salt transport
type: Concept
definition: a transport variable that is the transport of salt by all processes in the ocean, and both sea water and sea ice, with northward transport being positive.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: transport variable
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:53.0

soil
type: Concept
definition: a bulk geological material that is the upper layer of the earth that consists of minerals, organic material, water, air, and organisms.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: bulk geological material
related: climate reconstructions
related: instrumental
related: paleoclimatic modeling
created: 2018-03-26 00:00:00.0
modified: 2020-05-13 13:24:50.0

delta 138/134Ba
type: Concept
definition: the ratio of two isotopes of barium, 138Ba/134Ba, in a sample compared to that of a standard, as in: ((138Ba/134Ba sample)/(138Ba/134Ba standard) - 1) x 1000.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: isotope ratio
related: corals and sclerosponges
created: 2019-07-30 00:00:00.0
modified: 2020-05-13 13:24:54.0

per mil NIST 3104a
type: Concept
definition: a per mil unit calculated using the isotopic concentration of standard NIST 3104a.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: per mil
created: 2019-07-30 00:00:00.0
modified: 2020-05-13 13:24:54.0

foot
type: Concept
definition: a length unit that is equal to 0.3048 meters, or 12 inches (Credit: Units Ontology).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: length unit
created: 2019-08-28 00:00:00.0
modified: 2020-05-13 13:24:54.0

strontium-uranium
type: Concept
definition: an element ratio that is calculated from paired strontium/uranium and uranium/calcium measurements in order to correct for biological vital effects.
alternative label: Sr-U
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or compound ratio
related: corals and sclerosponges
created: 2019-09-04 00:00:00.0
modified: 2020-05-13 13:24:54.0

lead/zirconium
type: Concept
definition: the elemental ratio of lead to zirconium.
alternative label: Pb/Zr
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or compound ratio
related: paleolimnology
created: 2019-10-02 00:00:00.0
modified: 2020-05-13 13:24:54.0

lead/titanium
type: Concept
definition: the elemental ratio of lead to titanium.
alternative label: Pb/Ti
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or compound ratio
related: paleolimnology
created: 2019-10-02 00:00:00.0
modified: 2020-05-13 13:24:54.0

carbon/phosphorus
type: Concept
definition: the elemental ratio of carbon to phosphorus.
alternative label: C/P
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or compound ratio
related: paleoceanography
related: paleoclimatic modeling
created: 2019-10-02 00:00:00.0
modified: 2020-05-13 13:24:54.0

frost ring
type: Concept
definition: an event layer within a tree ring sample that, through anatomical damage, shows evidence for subfreezing temperatures within an annual ring
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: event layer
related: tree ring
created: 2019-10-07 00:00:00.0
modified: 2020-05-13 13:24:54.0

light ring
type: Concept
definition: an event layer within a tree ring sample that, though light coloring of the latewood, shows evidence for adverse climate conditions
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: event layer
related: tree ring
created: 2019-10-07 00:00:00.0
modified: 2020-05-13 13:24:54.0

Acropora millepora
type: Concept
definition: a particular species of the Acropora genus.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: Acropora sp.
related: corals and sclerosponges
created: 2019-10-07 00:00:00.0
modified: 2020-05-13 13:24:54.0

neodymium/calcium
type: Concept
definition: the elemental ratio of neodymium to calcium.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or compound ratio
related: paleoceanography
created: 2019-11-07 00:00:00.0
modified: 2020-05-13 13:24:54.0

zinc/calcium
type: Concept
definition: the elemental ratio of zinc to calcium.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or compound ratio
related: paleoceanography
created: 2019-11-07 00:00:00.0
modified: 2020-05-13 13:24:54.0

joule
type: Concept
definition: an energy unit that is the energy required for a force of one newton to move an object one meter in the direction of the force (Credit: Units of measurement ontology).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: energy unit
created: 2019-11-27 00:00:00.0
modified: 2020-05-13 13:24:54.0

ocean heat content
type: Concept
definition: an energy content variable that quantifies the amount of heat contained in some specified volume of the ocean.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: energy content variable
related: climate reconstructions
created: 2019-11-27 00:00:00.0
modified: 2020-05-13 13:24:54.0

energy content variable
type: Concept
definition: an energy variable that quantifies the energy contained, or properties affecting this, within a part of earth system.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: energy variable
narrower: ocean heat content
created: 2019-12-02 00:00:00.0
modified: 2020-05-13 13:24:54.0

energy variable
type: Concept
definition: an earth system variable that quantifies energy, or properties affecting energy, within the earth system.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: earth system variable
narrower: energy content variable
narrower: energy flux variable
created: 2019-12-02 00:00:00.0
modified: 2020-05-13 13:24:54.0

Delta 47
type: Concept
definition: an isotope ratio that measures the excess abundance of carbon dioxide with mass 47 (13C 18O 16O) in carbonate relative to a theoretical stochastic distribution.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: isotope ratio
related: paleoceanography
related: speleothems
created: 2019-12-02 00:00:00.0
modified: 2020-05-13 13:24:54.0

Delta 47
type: Concept
definition: an isotope ratio that measures the excess abundance of carbon dioxide with mass 47 (13C 18O 16O) in carbonate relative to a theoretical stochastic distribution.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: isotope ratio
related: climate reconstructions
created: 2019-12-02 00:00:00.0
modified: 2020-05-13 13:24:54.0

picomole
type: Concept
definition: a substance unit equal to a trillionth of a mol or 10^[-12] mol (Credit: Units of measurement ontology).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: substance unit
created: 2020-01-17 00:00:00.0
modified: 2020-05-13 13:24:54.0

area density unit
type: Concept
definition: a unit which is a standard measure of the mass exerting an influence on a given area (Credit: Units of measurement ontology).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: unit
narrower: gram per square centimeter
narrower: gram per square meter
narrower: kilogram per square kilometer
narrower: kilogram per square meter
narrower: nanogram per square micrometer
created: 2020-02-25 00:00:00.0
modified: 2020-05-13 13:24:54.0

picogram per gram per square centimeter per year
type: Concept
definition: a mass fraction per area per time unit that measures the number of picograms, or 10^[-12] g, of one subcomponent of a sample relative to one gram of either another subcomponent or of the entire sample, per square centimeter, or 10^[-4] m^[2], per year.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: mass fraction per area per time unit
created: 2020-02-28 00:00:00.0
modified: 2020-05-13 13:24:54.0

mass fraction per area per time unit
type: Concept
definition: a rate unit that is a standard measure of the mass fraction concentration per unit area per time.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: rate unit
narrower: picogram per gram per square centimeter per year
created: 2020-02-28 16:14:07.0
modified: 2020-05-13 13:24:54.0

delta 44Ca
type: Concept
definition: the ratio of two isotopes of calcium, 44Ca/40Ca, in a sample compared to that of a standard, as in: ((44Ca/40Ca sample)/(44Ca/40Ca standard) - 1) x 1000.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: isotope ratio
related: speleothems
created: 2020-02-28 00:00:00.0
modified: 2020-12-19 00:04:11.0

per mil BSE
type: Concept
definition: a per mil unit calculated using the isotopic concentration of standard bulk silicate earth.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: per mil
created: 2020-02-28 16:34:29.0
modified: 2020-05-13 13:24:54.0

nanomole per milligram
type: Concept
definition: a molality unit which expresses a concentration of a solution of one billionth of a mole, or 10^[-9] mole, per milligram of solvent.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: molality unit
created: 2020-03-20 00:00:00.0
modified: 2020-05-13 13:24:54.0

methionine
type: Concept
definition: an amino acid with the formula C5H11NO2S.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: amino acid
related: paleoceanography
created: 2020-04-02 00:00:00.0
modified: 2020-05-13 13:24:54.0

glutamic acid
type: Concept
definition: an amino acid with the formula C5H9NO4.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: amino acid
related: paleoceanography
created: 2020-04-02 00:00:00.0
modified: 2020-05-13 13:24:54.0

aspartic acid
type: Concept
definition: an amino acid with the formula C4H7NO4.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: amino acid
related: paleoceanography
created: 2020-04-02 00:00:00.0
modified: 2020-05-13 13:24:54.0

hydroxyproline
type: Concept
definition: an amino acid with the formula C5H9NO3.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: amino acid
related: paleoceanography
created: 2020-04-02 00:00:00.0
modified: 2020-05-13 13:24:54.0

pressure variable
type: Concept
definition: a circulation variable that measures the force per unit area.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: circulation variable
narrower: sea level pressure
narrower: surface pressure
created: 2020-04-11 18:35:04.0
modified: 2020-05-13 13:24:54.0

transport variable
type: Concept
definition: a circulation variable that measures the transport of a quantity (e.g., heat, salt, volume) per time.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: circulation variable
narrower: Antarctic Bottom Water
narrower: Atlantic Meridional Overturning Circulation Index
narrower: North Atlantic Deep Water
narrower: North Pacific Intermediate Water
narrower: barotropic streamfunction
narrower: meridional overturning streamfunction
narrower: northward ocean heat transport
narrower: northward ocean salt transport
narrower: ventilation age
created: 2020-04-11 18:42:26.0
modified: 2020-05-13 13:24:54.0

velocity variable
type: Concept
definition: a circulation variable that is a measure of the speed of the atmosphere, ocean, or other fluid and its direction of flow.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: circulation variable
narrower: ice sheet velocity
narrower: sea ice velocity
narrower: sea water velocity
narrower: vertical pressure velocity
narrower: wind direction
narrower: wind divergence
narrower: wind speed
created: 2020-04-13 00:40:59.0
modified: 2020-05-13 13:24:54.0

circulation length variable
type: Concept
definition: a circulation variable that measures the linear dimensions (length, depth, height) of some aspect of the circulation.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: circulation variable
narrower: atmospheric boundary layer thickness
narrower: geopotential height
narrower: mixed layer depth
created: 2020-04-13 00:41:59.0
modified: 2020-05-13 13:24:54.0

cutin
type: Concept
definition: a carbonyl compound that is a waxy, polyester polymer that is a main component of the plant cuticle.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: carbonyl compound
related: paleoceanography
created: 2020-04-15 00:00:00.0
modified: 2021-04-19 13:33:25.0

pollen
type: Concept
definition: a bulk biological material that consists of microscopic grains produced by seed plants for reproduction.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: bulk biological material
related: paleoceanography
created: 2020-04-15 18:10:55.0
modified: 2020-05-13 13:24:54.0

cross-validation coefficient of efficiency
type: Concept
definition: a coefficient of determination that quantifies whether a statistical or physically-based model is a better predictor of observed values than the mean climatology of the validation period and that is calculated as: 1 - (sum((observed-predicted)^2)/n)/(sum((observed-validation climatology)^2)/n), where each of the n data points is used to both train (calibrate) and test (validate) the model but never at the same time and the the measure is an average of the coefficient of efficiency over the n trials.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: coefficient of determination
created: 2020-04-23 13:49:12.0
modified: 2020-05-13 13:24:54.0

calibration root mean square error
type: Concept
definition: the root mean square error applied to the calibration period, defined as the sample standard deviation of the differences between predicted values and observed values over the calibration period, or sqrt (sum(predicted-observed)^2/sample size).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: root mean square error
created: 2020-04-23 00:00:00.0
modified: 2020-07-31 14:38:52.0

botryococcene
type: Concept
definition: an unbranched isoprenoid triterpene having the formula CnH2n-10 and that is a product of the green algae Botryococcus braunii (Credit: Wikipedia).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: alkene
related: paleoceanography
related: paleolimnology
created: 2020-04-23 15:02:17.0
modified: 2020-05-13 13:24:54.0

signal-free chronology method
type: Concept
definition: a tree ring chronology method that is designed to reduce the impact of long-term trends in climate on the fitting of tree ring growth curves to raw tree ring data.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: tree ring chronology method
created: 2020-04-24 00:00:00.0
modified: 2020-07-31 14:21:16.0

Acarinina sp.
type: Concept
definition: any foraminifer that belongs to the genus Acarinina.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: planktic foraminifer
narrower: Acarinina soldadoensis
related: paleoceanography
created: 2020-05-20 15:24:43.0

Acarinina soldadoensis
type: Concept
definition: a particular species of the genus Acarinina.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: Acarinina sp.
related: paleoceanography
created: 2020-05-20 15:25:40.0

delta 2H enrichment factor
type: Concept
definition: a measurement of the difference in hydrogen isotopic composition between two phases or two materials, expressed in per mil units and calculated as (alpha-1) *1000 where alpha is the isotopic fractionation factor between the two phases or materials.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: isotopic fractionation factor
created: 2020-06-01 00:00:00.0
modified: 2020-06-01 15:08:28.0

sample thickness
type: Concept
definition: sampling metadata that is a measure of the thickness of the measured sample.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: sampling metadata
related: borehole
related: climate forcing
related: climate reconstructions
related: corals and sclerosponges
related: fire history
related: ice cores
related: loess and paleosol
related: paleoceanography
related: paleolimnology
related: speleothems
related: tree ring
created: 2020-06-18 16:57:29.0

rhodium
type: Concept
definition: a chemical element with atomic number 45.
alternative label: Rh
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or single-element molecule
related: paleolimnology
created: 2020-06-18 23:53:12.0

actinium
type: Concept
definition: a chemical element with atomic number 89.
alternative label: Ac
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or single-element molecule
related: paleolimnology
created: 2020-06-18 23:54:24.0

symbiont
type: Concept
definition: the ecosystem quantity of organisms that live in partnership with another organism, to the mutual benefit of each.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: ecosystem quantity
related: paleoceanography
created: 2020-07-02 12:28:49.0

potential photochemical efficiency
type: Concept
definition: a measurement of the ratio of variable to maximum fluorescence that is relevant to photosynthesis.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: fluorescence
related: paleoceanography
created: 2020-07-02 12:35:05.0

effective absorption cross section
type: Concept
definition: a measure of absorbance that relates to the area available or required for absorption.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: absorbance
related: paleoceanography
created: 2020-07-02 13:05:30.0

square angstrom per quanta
type: Concept
definition: an area per count unit that is 10^[-20] m^[2] per one quanta.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: area unit
created: 2020-07-02 13:14:29.0

millimole per liter
type: Concept
definition: a molarity unit which expresses a concentration of a solution of one thousandth of a mole, or 10^[-3] mole, per one liter of solvent.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: molarity unit
created: 2020-07-21 18:24:14.0

nanomole per liter
type: Concept
definition: a molarity unit which expresses a concentration of a solution of one billionth of a mole, or 10^[-9] mole, per one liter of solvent.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: molarity unit
created: 2020-07-21 18:26:08.0

land area
type: Concept
definition: a geographic variable that quantifies the surface area of the land over specified geographic bounds.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: geographic variable
related: paleoclimatic modeling
created: 2020-08-14 16:24:33.0

resin duct area
type: Concept
definition: the cross-sectional area of ducts that transport resin within a tree.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: area
related: tree ring
created: 2020-08-14 17:13:23.0

ice mass loss
type: Concept
definition: the cryospheric process that is the loss of mass from a glacier, ice-cap, ice-sheet, or ice-shelf.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: cryospheric process
narrower: ice calving
narrower: ice melt
related: paleoclimatic modeling
created: 2020-08-14 00:00:00.0
modified: 2020-08-14 17:49:51.0

mass per volume per time unit
type: Concept
definition: a rate unit that is a standard measure of the accumulation or flow of mass per unit volume per time.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: rate unit
narrower: gram per cubic centimeter per kiloyear
created: 2020-08-24 12:26:33.0

gram per cubic centimeter per kiloyear
type: Concept
definition: a mass per volume per time unit that is one thousandth of a kilogram, or 10^[-3] kg, per one millionth of a cubic meter, or 10^[-6] m^[3], per one thousand years.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: mass per volume per time unit
created: 2020-08-24 12:28:13.0

230Th/238U
type: Concept
definition: the ratio of the radioactive isotope of thorium with 140 neutrons and the radioactive isotope of uranium with 146 neutrons.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: isotope ratio
related: corals and sclerosponges
created: 2020-08-26 16:24:47.0

230Th/232Th
type: Concept
definition: the ratio of the radioactive isotope of thorium with 140 neutrons and the radioactive isotope of thorium with 142 neutrons.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: isotope ratio
related: corals and sclerosponges
created: 2020-08-26 16:25:55.0

delta 234U
type: Concept
definition: the activity ratio of two isotopes of uranium, 234U/238U, in a sample relative to a secular equilibrium value of 1, as in: ((234U/238U ) - 1) x 1000.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: isotope ratio
related: corals and sclerosponges
created: 2020-08-26 16:35:46.0

activity ratio
type: Concept
definition: a dimensionless unit that is the ratio of activities, or rates of decay, of two radioactive isotopes.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: dimensionless
created: 2020-08-26 16:39:37.0

atomic ratio
type: Concept
definition: a dimensionless unit that is the ratio of atoms of one kind to atoms of another kind.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: dimensionless
created: 2020-08-26 16:42:20.0

ultra-high-performance liquid chromatography
type: Concept
definition: column chromatography where the mobile phase is a liquid, the stationary phase consists of very small (< 2 microm) particles and the inlet pressure is relatively high (Credit: Chemical Methods Ontology).
alternative label: UHPLC
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: liquid chromatography
created: 2020-09-02 23:38:03.0

long-chain diol index
type: Concept
definition: an organic compound index calculated based on the relative abundance of long chain alkyl 1,13- and 1,15-diols.
alternative label: LDI
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: organic compound index
related: paleoceanography
created: 2020-09-02 23:48:21.0

South Pacific Convergence Zone Index
type: Concept
definition: a circulation index that is calculated from mean sea level pressure and that captures east-west variations in the position of the South Pacific Convergence Zone.
alternative label: SPCZ
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: circulation index
created: 2020-09-03 00:35:10.0

uranium/aluminum
type: Concept
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or compound ratio
related: paleoceanography
created: 2020-09-29 00:00:00.0
modified: 2020-09-29 11:08:11.0

vanadium/calcium
type: Concept
definition: the elemental ratio of vanadium to calcium.
alternative label: V/Ca
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or compound ratio
created: 2020-10-28 10:31:29.0

cobalt/calcium
type: Concept
definition: the elemental ratio of cobalt to calcium.
alternative label: Co/Ca
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or compound ratio
created: 2020-10-28 10:32:17.0

nickel/calcium
type: Concept
definition: the elemental ratio of nickel to calcium.
alternative label: Ni/Ca
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or compound ratio
created: 2020-10-28 10:32:34.0

molybdenum/calcium
type: Concept
definition: the elemental ratio of molybdenum to calcium.
alternative label: Mo/Ca
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or compound ratio
created: 2020-10-28 10:33:32.0

silver/calcium
type: Concept
definition: the elemental ratio of silver to calcium.
alternative label: Ag/Ca
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or compound ratio
created: 2020-10-28 10:33:48.0

tungsten/calcium
type: Concept
definition: the elemental ratio of tungsten to calcium.
alternative label: W/Ca
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or compound ratio
created: 2020-10-28 10:34:22.0

blue intensity
type: Concept
definition: a physical measurement that is the level of blue light required to produce the color of a substance.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: physical measurement
created: 2020-11-09 00:00:00.0
modified: 2020-11-09 13:53:03.0

hydrogen carbonate
type: Concept
definition: an inorganic compound that has the chemical formula HCO3(-).
alternative label: HCO3-
alternative label: bicarbonate
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: inorganic compound
related: paleoclimatic modeling
created: 2020-11-09 13:52:35.0

carbonate ion
type: Concept
definition: an inorganic compound that has the chemical formula CO3(2-).
alternative label: CO3(2-)
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: inorganic compound
related: paleoclimatic modeling
created: 2020-11-09 13:53:52.0

atmosphere
type: Concept
definition: a pressure unit that is equivalent to 101325 pascal.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: pressure unit
created: 2020-11-09 17:49:07.0

mole per square meter per year
type: Concept
definition: a mole per area per time unit that is one mole, per one square meter, per one year.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: mole per area per time unit
created: 2020-11-09 17:52:24.0

mole per time unit
type: Concept
definition: a rate unit that is a standard measure of the accumulation of a mole of material per time.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: rate unit
narrower: mole per year
created: 2020-11-09 17:55:37.0

mole per year
type: Concept
definition: a mole per time unit that is one mole per one year.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: mole per time unit
created: 2020-11-09 17:56:35.0

mole per square meter per year per microatmosphere
type: Concept
definition: a mole per area per time unit that is one mole, per one square meter, per one year, and per one millionth of an atmosphere, or 10^[-6] atmosphere.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: mole per area per time unit
created: 2020-11-10 13:49:58.0

steric sea level change
type: Concept
definition: a measure of sea level rise or fall that is due to changing sea water density.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: sea level
narrower: barosteric sea level change
narrower: halosteric sea level change
narrower: salt-phase steric sea level change
narrower: thermosteric sea level change
related: paleoclimatic modeling
created: 2020-11-10 14:37:33.0

thermosteric sea level change
type: Concept
definition: steric sea level change that is caused by temperature effects on sea water density.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: steric sea level change
related: paleoclimatic modeling
created: 2020-11-10 00:00:00.0
modified: 2020-11-10 14:56:06.0

barosteric sea level change
type: Concept
definition: steric sea level change that is caused by density effects of the addition or removal of water from the ocean.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: steric sea level change
related: paleoclimatic modeling
created: 2020-11-10 14:42:45.0

halosteric sea level change
type: Concept
definition: steric sea level change that is caused by salinity effects on sea water density.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: steric sea level change
related: paleoclimatic modeling
created: 2020-11-10 00:00:00.0
modified: 2020-11-10 14:43:51.0

salt-phase steric sea level change
type: Concept
definition: steric sea level change that is caused by effects of salt phase (i.e., solid or dissolved) on sea water density.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: steric sea level change
related: paleoclimatic modeling
created: 2020-11-10 14:55:39.0

disintegration per minute per cubic centimeter
type: Concept
definition: a specific activity unit which is equal to the activity of a cubic centimeter of radioactive material in which one nucleus decays per minute or there is one atom disintegration per minute.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: specific activity unit
created: 2020-11-13 10:43:56.0

zirconium/rubidium
type: Concept
definition: the elemental ratio of zirconium to rubidium.
alternative label: Zr/Rb
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or compound ratio
related: paleoceanography
created: 2020-11-16 13:17:18.0

mole per square meter
type: Concept
definition: a mole per area unit that is one mole per one square meter.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: mole per area unit
created: 2020-11-25 14:40:03.0

mole per area unit
type: Concept
definition: a concentration unit that measures the number of moles of a given substance per an area.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: concentration unit
narrower: mole per square meter
created: 2020-11-25 14:42:18.0

gigaton per century
type: Concept
definition: a mass per time unit that is one billion tons, or 10^[9] tons, per one hundred years.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: mass per time unit
created: 2020-12-14 12:52:57.0

per mil SRM 915a
type: Concept
definition: a per mil unit calculated using the isotopic concentration of standard SRM 915a.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: per mil
created: 2020-12-19 00:05:38.0

Uvigerina sp.
type: Concept
definition: any foraminifer that belongs to the genus Uvigerina.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: identified foraminifer
narrower: Uvigerina peregrina
related: paleoceanography
created: 2020-12-23 10:55:46.0

count per month
type: Concept
definition: a count per time unit that is a simple count of the occurrence of a substance or an event per one month.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: count per time unit
created: 2021-01-08 00:00:00.0
modified: 2021-01-08 19:15:17.0

14C fraction modern
type: Concept
definition: an isotope ratio that is the 14C/12C ratio of a sample to that of modern, which is defined as 95% of the radiocarbon concentration (in AD 1950) of NBS Oxalic Acid I (SRM 4990B, OX-I) normalized for delta 13C (Credit: Woods Hole Oceanographic Institution). Note that this ratio is not technically a fraction since it does not have to be constrained between 0 and 1.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: isotope ratio
related: corals and sclerosponges
related: paleoceanography
created: 2021-01-12 23:44:07.0

maximum stomatal conductance
type: Concept
definition: a ecosystem process that is the highest rate of carbon dioxide entering or water exiting a leaf through its stomata.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: ecosystem process
related: climate reconstructions
created: 2021-01-16 23:39:41.0

stomatal size
type: Concept
definition: an ecosystem quantity that is a measure of the length or the area of the stomatal opening.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: ecosystem quantity
related: plant macrofossils
created: 2021-01-16 00:00:00.0
modified: 2021-01-16 23:57:40.0

stomatal index
type: Concept
definition: an ecosystem index that is the ratio of the number of stomatal cells per unit area to the sum of stomatal cells plus epidermal cells per unit area, multiplied by 100.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: ecosystem index
related: plant macrofossils
created: 2021-01-22 23:02:43.0

stomatal density
type: Concept
definition: an ecosystem quantity that is the count of stomata per area.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: ecosystem quantity
related: plant macrofossils
created: 2021-01-22 23:20:58.0

count per cubic millimeter
type: Concept
definition: a count per volume unit that applies to one cubic millimeter, or 10^[-9] cubic meters.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: count per volume unit
created: 2021-01-22 23:30:20.0

per mil per kiloyear
type: Concept
definition: a concentration per time unit that is a parts per thousand ratio per one thousand years.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: concentration per time unit
created: 2021-01-24 19:26:17.0

C36 n-alkane
type: Concept
definition: a n-alkane with the chemical formula C36H74.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: n-alkane
related: paleoceanography
created: 2021-02-17 09:35:28.0

C36 n-alkane
type: Concept
definition: a n-alkane with the chemical formula C36H74.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: n-alkane
related: paleoceanography
created: 2021-02-17 09:36:37.0

C37 n-alkane
type: Concept
definition: a n-alkane with the chemical formula C37H76.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: n-alkane
related: paleoceanography
created: 2021-02-17 09:37:26.0

C37 n-alkane
type: Concept
definition: a n-alkane with the chemical formula C37H76.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: n-alkane
related: paleoceanography
created: 2021-02-17 09:37:47.0

C38 n-alkane
type: Concept
definition: a n-alkane with the chemical formula C38H78.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: n-alkane
related: paleoceanography
created: 2021-02-17 09:38:09.0

C38 n-alkane
type: Concept
definition: a n-alkane with the chemical formula C38H78.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: n-alkane
related: paleoceanography
created: 2021-02-17 09:38:34.0

C39 n-alkane
type: Concept
definition: a n-alkane with the chemical formula C39H80.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: n-alkane
related: paleoceanography
created: 2021-02-17 09:40:36.0

C39 n-alkane
type: Concept
definition: a n-alkane with the chemical formula C39H80.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: n-alkane
related: paleoceanography
created: 2021-02-17 09:41:00.0

C40 n-alkane
type: Concept
definition: a n-alkane with the chemical formula C40H82.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: n-alkane
related: paleoceanography
created: 2021-02-17 09:41:22.0

C40 n-alkane
type: Concept
definition: a n-alkane with the chemical formula C40H82.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: n-alkane
related: paleoceanography
created: 2021-02-17 09:41:45.0

C20 n-alkane
type: Concept
definition: a n-alkane with the chemical formula C20H42.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: n-alkane
related: paleoceanography
created: 2021-02-17 09:43:23.0

cell
type: Concept
definition: a biological material that is the smallest independent unit of life and from which all tissues and organisms are composed.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: biological material
related: tree ring
created: 2021-02-24 23:36:53.0

archeol caldarcheol ecometric
type: Concept
definition: an organic compound index based on the relative proportions of archeol, a diphytanyl glycerol diether, and caldarcheol, a glycerol dialkyl glycerol tetraether, that was developed as a proxy for salinity.
alternative label: ACE
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: organic compound index
related: paleolimnology
created: 2021-04-08 16:12:53.0

136Xe/129Xe
type: Concept
definition: the ratio of a radioactive isotope of xenon with 82 neutrons and a stable isotope of xenon with 75 neutrons.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: isotope ratio
related: ice cores
created: 2021-04-09 00:00:00.0
modified: 2021-04-09 18:08:40.0

134Xe/129Xe
type: Concept
definition: the ratio of a stable isotope of xenon with 80 neutrons and a stable isotope of xenon with 75 neutrons.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: isotope ratio
related: ice cores
created: 2021-04-09 17:53:57.0

132Xe/129Xe
type: Concept
definition: the ratio of a stable isotope of xenon with 78 neutrons and a stable isotope of xenon with 75 neutrons.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: isotope ratio
related: ice cores
created: 2021-04-09 17:54:30.0

86Kr/84Kr
type: Concept
definition: the ratio of a stable isotope of krypton with 50 neutrons and a stable isotope of krypton with 48 neutrons.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: isotope ratio
related: ice cores
created: 2021-04-09 17:56:09.0

40Ar/36Ar
type: Concept
definition: the ratio of a stable isotope of argon with 22 neutrons and a stable isotope of argon with 18 neutrons.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: isotope ratio
related: ice cores
created: 2021-04-09 17:57:00.0

84Kr/40Ar
type: Concept
definition: the ratio of a stable isotope of krypton with 48 neutrons and a stable isotope of argon with 22 neutrons.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: isotope ratio
related: ice cores
created: 2021-04-09 17:57:45.0

132Xe/40Ar
type: Concept
definition: the ratio of a stable isotope of xenon with 78 neutrons and a stable isotope of argon with 22 neutrons.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: isotope ratio
related: ice cores
created: 2021-04-09 17:58:39.0

129Xe/40Ar
type: Concept
definition: the ratio of a stable isotope of xenon with 75 neutrons and a stable isotope of argon with 22 neutrons.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: isotope ratio
related: ice cores
created: 2021-04-09 17:59:12.0

132Xe/84Kr
type: Concept
definition: the ratio of a stable isotope of xenon with 78 neutrons and a stable isotope of krypton with 48 neutrons.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: isotope ratio
related: ice cores
created: 2021-04-09 18:00:14.0

129Xe/84Kr
type: Concept
definition: the ratio of a stable isotope of xenon with 75 neutrons and a stable isotope of krypton with 48 neutrons.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: isotope ratio
related: ice cores
created: 2021-04-09 18:01:33.0

rubidium/calcium
type: Concept
definition: the elemental ratio of rubidium to calcium.
alternative label: Rb/Ca
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or compound ratio
related: paleoceanography
created: 2021-04-12 14:38:21.0

ring index
type: Concept
definition: an organic compound index that is the weighted average of ring numbers in glycerol dialkyl glycerol tetraether (GDGT) compounds. This index was developed to determine whether past GDGT distributions deviate from modern analogue distributions.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: organic compound index
related: paleoceanography
related: paleolimnology
created: 2021-04-16 13:33:57.0

hopane
type: Concept
definition: a hydrocarbon that is pentacyclic and has the general formula CnH(2n-8).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: hydrocarbon
related: paleoceanography
related: paleolimnology
created: 2021-04-16 15:01:31.0

archaeol
type: Concept
definition: a diether lipid that is one of the main membrane lipids of archaea, single-cell organisms lacking cell nuclei.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: ether
created: 2021-04-19 00:00:00.0
modified: 2021-04-19 13:19:20.0

ether
type: Concept
definition: An organooxygen compound with formula ROR, where R is not hydrogen (Credit: ChEBI).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: organooxygen compound
narrower: archaeol
narrower: glycerol dialkyl glycerol tetraether
created: 2021-04-19 13:03:54.0

carbonyl compound
type: Concept
definition: An organooxygen compound containing the carbonyl group, C=O.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: organooxygen compound
narrower: acetate
narrower: amino acid
narrower: cutin
narrower: fatty acid
narrower: formaldehyde
narrower: formate
narrower: ketone
narrower: oxalate
created: 2021-04-19 13:05:49.0

nanogram per square micrometer
type: Concept
definition: an area density unit which is equal to the mass of an object in nanograms, or 10^[-12] kilogram, per square micrometer, or 10^[-12] square meters.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: area density unit
created: 2021-05-05 18:11:29.0

methane index
type: Concept
definition: an organic compound index that is based on a ratio of glycerol dialkyl glycerol tetraethers. This index was developed to detect the destabilization and disassociation of gas hydrates.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: organic compound index
related: paleoceanography
related: paleolimnology
created: 2021-06-25 17:58:19.0

per mil SRM 951a
type: Concept
definition: a per mil unit calculated using the isotopic concentration of standard NIST SRM 951a.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: per mil
created: 2021-07-23 18:26:13.0

lipid
type: Concept
definition: an organooxygen compound that is insoluble in water and soluble in nonpolar solvents.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: organooxygen compound
narrower: fatty acid
narrower: glycerol dialkyl glycerol tetraether
related: paleolimnology
created: 2021-07-28 20:46:10.0

C38:4 alkenone
type: Concept
definition: a C38 alkenone that is tetra-unsaturated.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: C38 alkenone
related: paleoceanography
related: paleolimnology
created: 2021-08-04 09:51:44.0

C38:3 alkenone
type: Concept
definition: a C38 alkenone that is tri-unsaturated.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: C38 alkenone
related: paleoceanography
related: paleolimnology
created: 2021-08-04 09:52:29.0

C38:2 alkenone
type: Concept
definition: a C38 alkenone that is di-unsaturated.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: C38 alkenone
related: paleoceanography
related: paleolimnology
created: 2021-08-04 00:00:00.0
modified: 2021-08-04 10:57:45.0

C38 alkenone
type: Concept
definition: an alkenone that contains 38 carbon atoms.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: alkenone
narrower: C38:2 alkenone
narrower: C38:3 alkenone
narrower: C38:4 alkenone
related: paleoceanography
related: paleolimnology
created: 2021-08-04 10:49:48.0

ratio of isomeric ketones
type: Concept
definition: an organic compound index that is a ratio involving common and novel ketone isomers and that is used to identify species mixing effects.
alternative label: RIK
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: organic compound index
created: 2021-08-04 15:08:48.0

pith offset
type: Concept
definition: a formation property that is the count of missing growth increments during the first years of growth. Originally, this term referred specifically to missing rings in trees between the tree pith and the first recorded year of growth. The term has since been applied analogously to bivalve shells.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: formation property
related: paleoceanography
related: tree ring
created: 2021-08-05 17:21:43.0

Panopea generosa
type: Concept
definition: a bivalve whose common name is the Pacific geoduck.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: bivalve
related: paleoceanography
created: 2021-08-05 17:33:18.0

50% confidence interval lower bound
type: Concept
definition: the lower (minimum) bound of the confidence interval that captures the true value 50% of the time.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: confidence interval
created: 2021-08-05 18:22:23.0

50% confidence interval upper bound
type: Concept
definition: the upper (maximum) bound of the confidence interval that captures the true value 50% of the time.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: confidence interval
created: 2021-08-05 18:22:56.0

50% confidence interval margin of error
type: Concept
definition: the value, that when added to and subtracted from the mean estimate, creates a confidence interval that captures the true value 50% of the time.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: confidence interval
created: 2021-08-05 18:23:39.0

plant functional type
type: Concept
definition: an ecosystem index that groups plants according to particular characteristics such as their growth form, ecosystem role, phylogeny, physiology, or phenology. Plant functional types are often used in vegetation models and are groupings that are more specific than biomes.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: ecosystem index
related: paleoclimatic modeling
created: 2021-08-08 15:49:16.0

foliage projective cover
type: Concept
definition: an ecosystem index that is the fraction or percentage of ground area covered by the foliage of trees or shrubs. When expressed as a fraction, this index ranges from 0 to 1.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: ecosystem index
related: paleoclimatic modeling
created: 2021-08-08 16:09:15.0

mineral matter
type: Concept
definition: a bulk geological material that consists of particles composed of minerals.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: bulk geological material
narrower: volcanic material
related: paleoceanography
related: paleolimnology
created: 2021-08-10 16:48:08.0

75% confidence interval upper bound
type: Concept
definition: the upper (maximum) bound of the confidence interval that captures the true value 75% of the time.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: confidence interval
created: 2021-09-08 18:31:10.0

75% confidence interval lower bound
type: Concept
definition: the lower (minimum) bound of the confidence interval that captures the true value 75% of the time.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: confidence interval
created: 2021-09-08 00:00:00.0
modified: 2021-09-08 18:34:12.0

75% confidence interval margin of error
type: Concept
definition: the value, that when added to and subtracted from the mean estimate, creates a confidence interval that captures the true value 75% of the time.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: confidence interval
created: 2021-09-08 18:32:52.0

tellurium
type: Concept
definition: a chemical element with atomic number 52.
alternative label: Te
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or single-element molecule
related: paleoceanography
created: 2021-10-05 11:24:18.0

x-ray fluorescence
type: Concept
definition: a type of fluorescence that occurs due to ionization of a material by high-energy x-rays or gamma rays.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: fluorescence
related: paleoceanography
created: 2021-10-06 13:54:47.0

tektite
type: Concept
definition: a natural glass that formed during the melting and rapid cooling of rocks vaporized from the impact of astronomical objects on Earth.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: mineral matter
related: paleoceanography
created: 2021-10-06 14:14:19.0

Turborotalita quinqueloba
type: Concept
definition: a particular species of the genus Turborotalita.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: Turborotalita sp.
related: paleoceanography
created: 2021-10-18 10:48:17.0

Turborotalita sp.
type: Concept
definition: any foraminifer that belongs to the genus Turborotalita.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: planktic foraminifer
narrower: Turborotalita quinqueloba
related: paleoceanography
created: 2021-10-18 10:48:58.0

Siderastrea stellata
type: Concept
definition: a particular species of the genus Siderastrea that is commonly known as the Brazilian starlet coral.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: Siderastrea sp.
related: corals and sclerosponges
created: 2021-11-02 19:05:27.0

physiological scaling parameter
type: Concept
definition: an isotopic fractionation factor that quantifies the impact of biologic processes or parameters on fractionation during photosynthesis. These factors can include organism growth rate, cell size, or membrane permeability.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: isotopic fractionation factor
related: paleoceanography
created: 2021-11-08 13:56:11.0

sedimentary ancient DNA
type: Concept
definition: dioxyribonucleic acid (DNA) preserved in sediment that can be used to analyze ecological composition.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: aromatic compound
related: paleolimnology
created: 2021-11-08 14:23:24.0

per mil VSMOW-SLAP
type: Concept
definition: a per mil unit calculated using the isotopic concentrations of Vienna Standard Mean Ocean Water (VSMOW) and Standard Light Antarctic Precipitation (SLAP) such that the hydrogen and oxygen isotopic concentrations of SLAP relative to VSMOW are -428.0 and -55.5 per mil, respectively.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: per mil
created: 2021-11-24 16:07:01.0

Delta 48
type: Concept
definition: an isotope ratio that measures the excess abundance of carbon dioxide with mass 48 (12C 18O 18O) in carbonate relative to a theoretical stochastic distribution.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: isotope ratio
related: speleothems
created: 2021-11-24 16:39:42.0

Delta 48
type: Concept
definition: an isotope ratio that measures the excess abundance of carbon dioxide with mass 48 (12C 18O 18O) in carbonate relative to a theoretical stochastic distribution.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: isotope ratio
related: climate reconstructions
created: 2021-11-24 16:40:11.0

cubic micrometer
type: Concept
definition: a volume unit which is equal to 10^[-18] m^[3].
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: volume unit
created: 2021-12-10 15:23:02.0

microgram per cubic micrometer
type: Concept
definition: a mass density unit which is equal to mass of an object in micrograms, or 10^[-6] g, divided by the volume in cubic micrometers, or 10^[-18] cubic meters.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: mass density unit
created: 2021-12-10 00:00:00.0
modified: 2021-12-10 15:27:16.0

width
type: Concept
definition: a physical property that is the extent of an object from side to side.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: physical property
narrower: earlywood width
narrower: latewood width
narrower: total ring width
related: paleoceanography
related: tree ring
created: 2021-12-10 16:37:40.0

length
type: Concept
definition: a physical property that is the extent of an object from end to end.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: physical property
narrower: diameter
related: paleoceanography
created: 2021-12-10 16:47:21.0

radian
type: Concept
definition: an angle unit that is the SI unit for measuring angles. An arc of a circle with the same length as the radius of that circle subtends an angle of 1 radian (Wikipedia).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: angle unit
created: 2022-01-11 10:06:48.0

uranium/boron
type: Concept
definition: the elemental ratio of uranium to boron.
alternative label: U/B
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or compound ratio
related: corals and sclerosponges
created: 2022-01-14 12:40:56.0

uranium/strontium
type: Concept
definition: the elemental ratio of uranium to strontium.
alternative label: U/Sr
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or compound ratio
related: corals and sclerosponges
created: 2022-01-14 12:41:33.0

boron/magnesium
type: Concept
definition: the elemental ratio of boron to magnesium.
alternative label: B/Mg
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or compound ratio
related: corals and sclerosponges
created: 2022-01-14 12:42:31.0

magnesium/lithium
type: Concept
definition: the elemental ratio of magnesium to lithium.
alternative label: Mg/Li
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or compound ratio
related: paleoceanography
created: 2022-03-16 11:52:07.0

mole per millimole
type: Concept
definition: a mole fraction unit that measures the number of moles of one subcomponent of a sample relative to one millimole, or 10^[-3] mole, of either another subcomponent or of the entire sample.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: mole fraction unit
created: 2022-03-16 11:57:19.0

Atlantic Meridional Overturning Circulation Index
type: Concept
definition: a transport variable that measures the longitudinal (north/south) flux of water in the Atlantic Ocean, often as the maximum value of the meridional overturning streamfunction at some specified latitude.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: transport variable
related: paleoceanography
created: 2022-03-22 00:00:00.0
modified: 2022-03-30 13:31:12.0

pebble
type: Concept
definition: the abundance or concentration of particles with a diameter of 4 to 64 millimeters.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: grain size class
related: paleoceanography
created: 2022-04-04 10:50:44.0

grain size index
type: Concept
definition: a summation or ratio of grain size classes that is significant to paleoclimate or paleoenvironment.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: grain size class
related: paleoceanography
related: paleolimnology
created: 2022-04-04 12:15:54.0

guard cell length
type: Concept
definition: an ecosystem quantity that is the length of the cells that surround a stomatal opening in a plant.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: ecosystem quantity
related: plant macrofossils
created: 2022-04-05 16:12:50.0

guard cell width
type: Concept
definition: an ecosystem quantity that is the width of the cells that surround a stomatal opening in a plant.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: ecosystem quantity
related: plant macrofossils
created: 2022-04-05 16:13:18.0

calcifying fluid
type: Concept
definition: a hydrologic material that is the fluid within a coral from which the coral skeleton precipitates.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: hydrologic material
related: corals and sclerosponges
created: 2022-04-07 16:35:43.0

lithium/magnesium
type: Concept
definition: the elemental ratio of lithium to magnesium.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or compound ratio
related: climate reconstructions
related: corals and sclerosponges
created: 2022-04-07 16:46:20.0

diol index
type: Concept
definition: an organic compound index calculated based on the relative abundance of long chain alkyl 1,13- and 1,14-diols and that indicates past upwelling and nutrient conditions.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: organic compound index
related: paleoceanography
created: 2022-04-11 15:06:20.0

long-chain diol index
type: Concept
definition: an organic compound index calculated based on the relative abundance of long chain alkyl 1,13- and 1,15-diols.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: organic compound index
related: paleoceanography
created: 2022-04-11 15:10:01.0

14C dead carbon proportion
type: Concept
definition: an isotope ratio that is the amount of non-radioactive ("dead") carbon in a sample compared to the amount expected given the sample's age. This value is calculated as the ratio of the measured radiocarbon activity of the sample to the radiocarbon activity of the coeval atmosphere, subtracted from one and multiplied by 100.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: isotope ratio
related: speleothems
created: 2022-05-16 14:38:33.0

per mil I-CDES
type: Concept
definition: a per mil unit calculated using the Intercarb-Carbon Dioxide Equilibrium Scale.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: per mil
created: 2022-06-17 16:35:57.0

cryospheric index
type: Concept
definition: a cryospheric variable that measures a quantity on a relative scale.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: cryospheric variable
narrower: glaciation index
created: 2022-07-15 16:11:25.0

glaciation index
type: Concept
definition: a cryospheric index that reflects the extent of regional ice cover.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: cryospheric index
related: climate reconstructions
related: paleolimnology
created: 2022-07-15 16:12:26.0

monsoon index
type: Concept
definition: a moisture index that describes conditions related to a monsoon on a scale ranging from 'wetter' to 'drier.'
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: moisture index
related: climate reconstructions
created: 2022-07-22 18:32:02.0

degree Celsius per degree latitude
type: Concept
definition: a gradient unit that measures the latitudinal temperature gradient as the change of temperature in degree Celsius with distance in degree latitude.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: gradient unit
created: 2022-07-22 18:40:55.0

watt per square meter per degree latitude
type: Concept
definition: a gradient unit that measures a energy flux gradient as the change of energy flux in watt per meter square with distance in degree latitude.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: gradient unit
created: 2022-07-22 18:42:46.0

gradient unit
type: Concept
definition: a unit that measures the change in a quantity over distance.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: unit
narrower: degree Celsius per degree latitude
narrower: watt per square meter per degree latitude
created: 2022-07-22 18:44:04.0

count per milligram
type: Concept
definition: a count per mass unit that applies to one milligram, or 10^[-3] grams.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: count per mass unit
created: 2022-08-14 18:33:53.0

mu unit
type: Concept
definition: a mathematical unit that scales values by the mean (e.g., one mu unit is equal to the mean, 1.5 mu units is 1.5 times the mean, etc.)
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
created: 2022-08-16 16:22:34.0

mixed layer depth
type: Concept
definition: a circulation length variable that is the thickness of the upper, well-mixed portion of the ocean.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: circulation length variable
related: paleoclimatic modeling
created: 2018-04-19 00:00:00.0
modified: 2020-05-13 13:24:51.0

surface heat flux
type: Concept
definition: an energy flux variable that is the sum of all heat fluxes at the lower boundary of the atmosphere, including radiative, latent, and sensible heat fluxes.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: energy flux variable
related: paleoclimatic modeling
created: 2018-04-19 00:00:00.0
modified: 2020-05-13 13:24:51.0

dissolved iron
type: Concept
definition: the amount of iron dissolved in a solution.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: iron
related: paleoclimatic modeling
created: 2018-04-19 00:00:00.0
modified: 2020-05-13 13:24:51.0

dissolved phosphate
type: Concept
definition: the amount of phosphate dissolved in a solution.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: phosphate
related: paleoclimatic modeling
created: 2018-04-19 00:00:00.0
modified: 2020-05-13 13:24:51.0

zirconium/potassium
type: Concept
definition: the elemental ratio of zirconium to potassium.
alternative label: Zr/K
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or compound ratio
related: paleolimnology
created: 2018-04-19 00:00:00.0
modified: 2020-05-13 13:24:54.0

jet stream position
type: Concept
definition: a circulation index that is the position, often expressed as the mean latitude, of a fast-flowing atmospheric current.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: circulation index
related: climate reconstructions
created: 2018-04-19 00:00:00.0
modified: 2020-05-13 13:24:54.0

organism index
type: Concept
definition: a measurement, such as a ratio or count, of organisms not belonging to the same high-level taxonomic group that is derived from a series of observations and that is used as an indicator or measure.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: organism
related: paleolimnology
created: 2018-04-19 00:00:00.0
modified: 2020-05-13 13:24:54.0

practical salinity unit per second
type: Concept
definition: a salinity per time unit that is one practical salinity unit per one second.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: salinity per time unit
created: 2018-04-19 00:00:00.0
modified: 2020-05-13 13:24:51.0

micromole per cubic meter
type: Concept
definition: a molarity unit which expresses a concentration of a solution of one millionth of a mole, or 10^[-6] mole, per one cubic meter of solvent.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: molarity unit
created: 2018-04-19 00:00:00.0
modified: 2020-05-13 13:24:54.0

gram per centimeter per year
type: Concept
definition: a mass per length per time unit that is one thousandth of a kilogram, or 10^[-3] kg, per one hundredth of a meter, or 10^[-2] m, per one year.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: mass per length per time unit
created: 2018-04-19 00:00:00.0
modified: 2020-05-13 13:24:51.0

mass per length per time unit
type: Concept
definition: a rate unit that is a standard measure of the accumulation or flow of mass per unit length per time.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: rate unit
narrower: gram per centimeter per year
created: 2018-04-19 00:00:00.0
modified: 2020-05-13 13:24:54.0

salinity per time unit
type: Concept
definition: a rate unit that is a standard measure of the change in salinity of a substance per unit time.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: rate unit
narrower: practical salinity unit per second
created: 2018-04-19 00:00:00.0
modified: 2020-05-13 13:24:51.0

count per square micrometer
type: Concept
definition: a count per area unit that applies to an area of one square micrometer, or 10^[-12] square meters.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: count per area unit
created: 2018-05-14 00:00:00.0
modified: 2020-05-13 13:24:50.0

Cibicidoides lobatulus
type: Concept
definition: a particular species of the genus Cibicidoides.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: Cibicidoides sp.
related: paleoceanography
created: 2018-05-14 00:00:00.0
modified: 2020-05-13 13:24:50.0

Planulina sp.
type: Concept
definition: any foraminifer that belongs to the genus Planulina.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: calcareous benthic foraminifer
related: paleoceanography
created: 2018-05-14 00:00:00.0
modified: 2020-05-13 13:24:50.0

oxide and hydroxide minerals
type: Concept
definition: an identified mineral that is characterized by the linkage of oxygen or hydroxide (OH) with one or more metallic elements (Credit: Dictionary of Geological Terms).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: identified mineral
created: 2018-07-19 00:00:00.0
modified: 2020-05-13 13:24:54.0

fulvic acid
type: Concept
definition: an aromatic compound that is an acidic organic polymer originating from microbial metabolism and found in soil, sediments, and aquatic environments.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: aromatic compound
related: speleothems
created: 2018-08-24 00:00:00.0
modified: 2020-05-13 13:24:54.0

Hadley circulation index
type: Concept
definition: a circulation index that measures some aspect of the global-scale tropical atmospheric circulation known as the Hadley circulation, such as its strength, width, or northern or southern positional limits.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: circulation index
related: climate reconstructions
related: instrumental
related: paleoclimatic modeling
related: tree ring
created: 2018-11-19 00:00:00.0
modified: 2020-05-13 13:24:54.0

ventilation age
type: Concept
definition: a transport variable that measures the time elapsed since ocean water was last in contact with the atmosphere.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: transport variable
related: paleoceanography
related: paleoclimatic modeling
created: 2018-11-19 00:00:00.0
modified: 2020-05-13 13:24:50.0

North Atlantic Deep Water
type: Concept
definition: a transport variable that measures the flux of the deep water mass formed in the North Alantic Ocean.
alternative label: NADW
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: transport variable
related: paleoceanography
related: paleoclimatic modeling
created: 2018-11-19 00:00:00.0
modified: 2020-05-13 13:24:54.0

Antarctic Bottom Water
type: Concept
definition: a transport variable that measures the flux of the bottom water mass formed in the Southern Ocean.
alternative label: AABW
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: transport variable
related: paleoceanography
related: paleoclimatic modeling
created: 2018-11-19 00:00:00.0
modified: 2020-05-13 13:24:50.0

North Pacific Intermediate Water
type: Concept
definition: a transport variable that measures the flux of the intermediate-depth water mass formed in the North Pacific Ocean.
alternative label: NPIW
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: transport variable
related: paleoceanography
related: paleoclimatic modeling
created: 2018-11-19 00:00:00.0
modified: 2020-05-13 13:24:54.0

chlorophyte
type: Concept
definition: an identifiable organism that belongs to the green algae, namely kingdom Plantae, division Chlorophyta.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: organism
narrower: identified chlorophyte
related: paleolimnology
created: 2018-11-19 00:00:00.0
modified: 2020-05-13 13:24:50.0

identified chlorophyte
type: Concept
definition: a chlorophyte that has been identified taxonomically, with any information such as genus or species listed in the 'Additional Information' field.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: chlorophyte
related: paleolimnology
created: 2018-11-19 00:00:00.0
modified: 2020-05-13 13:24:54.0

vivianite
type: Concept
definition: a phosphate mineral with the formula Fe3(2+)(PO4)2·8H2O.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: phosphate mineral
related: paleolimnology
created: 2018-11-19 00:00:00.0
modified: 2020-05-13 13:24:54.0

carbohydrate
type: Concept
definition: an organooxygen compound that contains only carbon, hydrogen and oxygen atoms and that prior to any oxidation or reduction, generally have the empirical formula Cm(H2O)n.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: organooxygen compound
narrower: cellulose
narrower: galactosan
narrower: levoglucosan
narrower: mannosan
related: paleolimnology
created: 2018-11-19 00:00:00.0
modified: 2020-05-13 13:24:54.0

levoglucosan
type: Concept
definition: a carbohydrate with the formula C6H10O5 and IUPAC stereodescriptor (1R,2S,3S,4R,5R).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: carbohydrate
related: paleolimnology
created: 2018-11-19 00:00:00.0
modified: 2020-05-13 13:24:50.0

mannosan
type: Concept
definition: a carbohydrate with the formula C6H10O5 and IUPAC stereodescriptor (1R,2S,3S,4S,5R).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: carbohydrate
related: paleolimnology
created: 2018-11-19 00:00:00.0
modified: 2020-05-13 13:24:54.0

galactosan
type: Concept
definition: a carbohydrate with the formula C6H10O5 and IUPAC stereodescriptor (1R,2R,3S,4R,5R).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: carbohydrate
related: paleolimnology
created: 2018-11-19 00:00:00.0
modified: 2020-05-13 13:24:54.0

coprostanol
type: Concept
definition: a sterol that has the chemical formula C27H48O and IUPAC stereodescriptor (3S,5R,8R,9S,10S,13R,14S,17R) and that has frequently been used as a biomarker for the presence of fecal matter in the environment.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: sterol
related: paleolimnology
created: 2018-11-19 00:00:00.0
modified: 2020-05-13 13:24:54.0

epicoprostanol
type: Concept
definition: a sterol that has the chemical formula C27H48O and IUPAC stereodescriptor (3R,5R,8R,9S,10S,13R,14S,17R) and that has frequently been used as a biomarker for the presence of fecal matter in the environment.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: sterol
related: paleolimnology
created: 2018-11-19 00:00:00.0
modified: 2020-05-13 13:24:54.0

cholestanol
type: Concept
definition: a sterol that has the chemical formula C27H48O and IUPAC stereodescriptor (3S,5S,8S,9S,10S,13R,14S,17R) and that has frequently been used as a biomarker for the presence of fecal matter in the environment.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: sterol
related: paleolimnology
created: 2018-11-19 00:00:00.0
modified: 2020-05-13 13:24:50.0

stigmastanol
type: Concept
definition: a sterol that has the chemical formula C29H52O.
alternative label: sitostanol
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: sterol
related: paleolimnology
created: 2018-11-19 00:00:00.0
modified: 2020-06-17 17:15:23.0

sitosterol
type: Concept
definition: a sterol that has the chemical formula C29H50O.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: sterol
related: paleolimnology
created: 2018-11-19 00:00:00.0
modified: 2020-05-13 13:24:50.0

P-aqueous
type: Concept
definition: an organic compound index that measures the relative predominance of submerged versus emergent aquatic plants and that is generally calculated from n-alkanes as (C23 + C25)/(C23 + C25 + C29 + C31).
alternative label: Paq
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: organic compound index
related: paleolimnology
created: 2018-11-19 00:00:00.0
modified: 2020-05-13 13:24:54.0

vegetation change index
type: Concept
definition: an organic compound index that measures changes in the composition of terrestrial vegetation and that is calculated from n-alkanes.
alternative label: Norm31
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: organic compound index
related: paleolimnology
created: 2018-11-19 00:00:00.0
modified: 2020-05-13 13:24:54.0

C10 n-alkane
type: Concept
definition: a n-alkane with the chemical formula C10H22.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: n-alkane
related: paleoceanography
related: paleolimnology
created: 2018-11-19 00:00:00.0
modified: 2020-05-13 13:24:50.0

C11 n-alkane
type: Concept
definition: a n-alkane with the chemical formula C11H24.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: n-alkane
related: paleoceanography
related: paleolimnology
created: 2018-11-19 00:00:00.0
modified: 2020-05-13 13:24:50.0

C12 n-alkane
type: Concept
definition: a n-alkane with the chemical formula C12H26.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: n-alkane
related: paleoceanography
related: paleolimnology
created: 2018-11-19 00:00:00.0
modified: 2020-05-13 13:24:50.0

C13 n-alkane
type: Concept
definition: a n-alkane with the chemical formula C13H28.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: n-alkane
related: paleoceanography
related: paleolimnology
created: 2018-11-19 00:00:00.0
modified: 2020-05-13 13:24:50.0

C14 n-alkane
type: Concept
definition: a n-alkane with the chemical formula C14H30.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: n-alkane
related: paleoceanography
related: paleolimnology
created: 2018-11-19 00:00:00.0
modified: 2020-05-13 13:24:50.0

C15 n-alkane
type: Concept
definition: a n-alkane with the chemical formula C15H32.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: n-alkane
related: paleoceanography
related: paleolimnology
created: 2018-11-19 00:00:00.0
modified: 2020-05-13 13:24:50.0

C16 n-alkane
type: Concept
definition: a n-alkane with the chemical formula C16H34.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: n-alkane
related: paleoceanography
related: paleolimnology
created: 2018-11-19 00:00:00.0
modified: 2020-05-13 13:24:50.0

C17 n-alkane
type: Concept
definition: a n-alkane with the chemical formula C17H36.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: n-alkane
related: paleoceanography
related: paleolimnology
created: 2018-11-19 00:00:00.0
modified: 2020-05-13 13:24:50.0

C18 n-alkane
type: Concept
definition: a n-alkane with the chemical formula C18H38.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: n-alkane
related: paleoceanography
related: paleolimnology
created: 2018-11-19 00:00:00.0
modified: 2020-05-13 13:24:50.0

C19 n-alkane
type: Concept
definition: a n-alkane with the chemical formula C19H40.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: n-alkane
related: paleoceanography
related: paleolimnology
created: 2018-11-19 00:00:00.0
modified: 2020-05-13 13:24:50.0

C20 n-alkane
type: Concept
definition: a n-alkane with the chemical formula C20H42.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: n-alkane
related: paleoceanography
related: paleolimnology
created: 2018-11-19 00:00:00.0
modified: 2020-05-13 13:24:50.0

Intertropical Convergence Zone index
type: Concept
definition: a circulation index that measures some aspect of the belt of low pressure where trade winds converge, such as its latitudinal position.
alternative label: ITCZ
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: circulation index
related: climate reconstructions
related: paleoclimatic modeling
created: 2018-11-19 00:00:00.0
modified: 2020-05-13 13:24:54.0

Niño 1+2 sea surface temperature index
type: Concept
definition: an index of the El Niño Southern Oscillation that is calculated as the sea surface temperature anomaly averaged over 0-10 degrees south latitude and 90 to 80 degrees west longitude.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: El Niño Southern Oscillation Index
related: climate reconstructions
related: instrumental
related: paleoceanography
related: paleoclimatic modeling
created: 2018-11-19 00:00:00.0
modified: 2020-05-13 13:24:54.0

Niño 3 sea surface temperature index
type: Concept
definition: an index of the El Niño Southern Oscillation that is calculated as the sea surface temperature anomaly averaged over 5 degrees north to 5 degrees south latitude and 150 to 90 degrees west longitude.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: El Niño Southern Oscillation Index
related: climate reconstructions
related: instrumental
related: paleoceanography
related: paleoclimatic modeling
created: 2018-11-19 00:00:00.0
modified: 2020-05-13 13:24:50.0

Niño 3.4 sea surface temperature index
type: Concept
definition: an index of the El Niño Southern Oscillation that is calculated as the sea surface temperature anomaly averaged over 5 degrees north to 5 degrees south latitude and 170 to 120 degrees west longitude.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: El Niño Southern Oscillation Index
related: climate reconstructions
related: instrumental
related: paleoceanography
related: paleoclimatic modeling
created: 2018-11-19 00:00:00.0
modified: 2020-05-13 13:24:54.0

Niño 4 sea surface temperature index
type: Concept
definition: an index of the El Niño Southern Oscillation that is calculated as the sea surface temperature anomaly averaged over 5 degrees north to 5 degrees south latitude and 160 degrees east to 150 degrees west longitude.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: El Niño Southern Oscillation Index
related: climate reconstructions
related: instrumental
related: paleoceanography
related: paleoclimatic modeling
created: 2018-11-19 00:00:00.0
modified: 2020-05-13 13:24:54.0

C3 plants
type: Concept
definition: an ecosystem quantity that measures the presence of plants using the Calvin photosynthetic pathway.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: ecosystem quantity
related: climate reconstructions
related: instrumental
related: paleolimnology
created: 2018-11-19 00:00:00.0
modified: 2020-05-13 13:24:54.0

isomer ratio
type: Concept
definition: an organic compound index that is calculated as the ratio of various branched tetraethers, with 6-methylated and 5-methylated isomers separated.
alternative label: IR
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: organic compound index
related: paleoceanography
related: paleolimnology
created: 2018-11-19 00:00:00.0
modified: 2020-05-13 13:24:54.0

gypsum
type: Concept
definition: a sulfate mineral with the formula CaSO4·2(H2O).
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: identified mineral
related: paleolimnology
created: 2018-11-19 00:00:00.0
modified: 2020-05-13 13:24:50.0

chi-square
type: Concept
definition: a goodness-of-fit measure that quantifies how observed data fits expected data and that is calculated as the sum of ((observed-expected)^2/expected).
alternative label: X2
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: goodness-of-fit measure
created: 2018-11-19 00:00:00.0
modified: 2020-05-13 13:24:54.0

per meg VSMOW-SLAP
type: Concept
definition: a parts per million unit calculated using the isotopic concentrations of Standard Mean Ocean Water and Standard Light Antarctic Precipitation.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: parts per million
created: 2018-11-19 00:00:00.0
modified: 2021-11-24 15:59:54.0

millimole per square meter per second
type: Concept
definition: a mole per area per time unit that is one thousandth of a mole, or 10^[-3] mole, per one square meter, per one second.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: mole per area per time unit
created: 2018-11-19 00:00:00.0
modified: 2020-05-13 13:24:50.0

nanogram per square meter per day
type: Concept
definition: a mass per area per time unit that is one billionth of a gram, or 10^[-9] g, per one square meter, per one day.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: mass per area per time unit
created: 2018-11-19 00:00:00.0
modified: 2020-05-13 13:24:54.0

log-transformed
type: Concept
definition: a data transformation that involves applying the logarithm function, generally to reduce the skew of the data distribution.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: detail
created: 2018-11-19 00:00:00.0
modified: 2020-05-13 13:24:50.0

Bayesian inference
type: Concept
definition: a statistical analysis method that uses Bayes' Theorem to update the probability of a hypothesis being true as more information becomes available.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: statistical analysis method
narrower: Bayesian hierarchical modeling
created: 2018-11-19 00:00:00.0
modified: 2020-05-13 13:24:54.0

silicon dioxide/organic carbon
type: Concept
definition: the ratio of silicon dioxide to organic carbon.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or compound ratio
related: paleoceanography
created: 2018-12-20 00:00:00.0
modified: 2020-05-13 13:24:54.0

carbonate/organic carbon
type: Concept
definition: the ratio of carbonate to organic carbon.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or compound ratio
related: paleoceanography
created: 2018-12-20 00:00:00.0
modified: 2020-05-13 13:24:54.0

iodine
type: Concept
definition: a chemical element with atomic number 53.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or single-element molecule
related: paleoceanography
created: 2019-08-21 00:00:00.0
modified: 2020-05-13 13:24:54.0

grain size delta variate
type: Concept
definition: a grain size parameter that is defined as (2K-3S^2-6)/(K+3) where K is grain size kurtosis and S is grain size skewness
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: grain size parameter
related: paleoceanography
created: 2019-08-21 00:00:00.0
modified: 2020-05-13 13:24:54.0

n-alkanol
type: Concept
definition: an alcohol with the general formula CnH(2n+2)O.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: alcohol
narrower: octacosanol
related: paleoceanography
created: 2019-08-21 00:00:00.0
modified: 2020-05-13 13:24:54.0

46Ca/43Ca
type: Concept
definition: the ratio of a stable isotope of calcium with 26 neutrons and a stable isotope of calcium with 23 neutrons.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: isotope ratio
related: paleoceanography
created: 2019-08-21 00:00:00.0
modified: 2020-05-13 13:24:54.0

concentration per time unit
type: Concept
definition: a rate unit that is a standard measure of concentration per unit time.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: rate unit
narrower: parts per billion per year
narrower: parts per million per year
narrower: per mil per kiloyear
narrower: per mil per year
created: 2019-08-21 00:00:00.0
modified: 2020-05-13 13:24:54.0

parts per million per year
type: Concept
definition: a concentration per time unit that is the amount of a given substance in a total amount of one million, or 10^[6], per one year.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: concentration per time unit
created: 2019-08-21 00:00:00.0
modified: 2020-05-13 13:24:54.0

parts per billion per year
type: Concept
definition: a concentration per time unit that is the amount of a given substance in a total amount of one billion, or 10^[9], per one year.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: concentration per time unit
created: 2019-08-21 00:00:00.0
modified: 2020-05-13 13:24:54.0

per mil per year
type: Concept
definition: a concentration per time unit that is a parts per thousand ratio per one year.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: concentration per time unit
created: 2019-08-21 00:00:00.0
modified: 2020-05-13 13:24:54.0

teragram per year
type: Concept
definition: a mass per time unit that is one trillion grams, or 10^[12] grams, per one year.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: mass per time unit
created: 2019-08-21 00:00:00.0
modified: 2020-05-13 13:24:54.0

count per square millimeter
type: Concept
definition: a count per area unit that applies to an area of one square millimeter, or 10^[-6] square meters.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: count per area unit
created: 2019-08-21 00:00:00.0
modified: 2020-05-13 13:24:54.0

count per square meter per day
type: Concept
definition: a count per area per time unit that is a simple count of a substance per one square meter and per one day.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: count per area per time unit
created: 2019-08-21 00:00:00.0
modified: 2020-05-13 13:24:54.0

microatmosphere
type: Concept
definition: a pressure unit that is one millionth of an atmosphere, or 10^[-6] atmosphere, and which is equivalent to 0.101325 pascal.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: pressure unit
created: 2019-08-21 00:00:00.0
modified: 2020-05-13 13:24:54.0

count per square meter per kiloyear
type: Concept
definition: a count per area per time unit that is a simple count of a substance per one square meter and per one thousand years, or 10^[3] years.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: count per area per time unit
created: 2019-08-21 00:00:00.0
modified: 2020-05-13 13:24:54.0

count per kiloyear
type: Concept
definition: a count per time unit that is a simple count of a substance per one thousand years, or 10^[3] years.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: count per time unit
created: 2019-08-21 00:00:00.0
modified: 2020-05-13 13:24:54.0

mole per kilogram
type: Concept
definition: a molality unit which expresses a concentration of a solution of one mole per kilogram of solvent.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: molality unit
created: 2019-08-21 00:00:00.0
modified: 2020-05-13 13:24:54.0

meter per million years
type: Concept
definition: a length per time unit that is one meter per one million years, or 10^[6] years.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: length per time unit
created: 2019-08-21 00:00:00.0
modified: 2020-05-13 13:24:54.0

nanomole per micromole
type: Concept
definition: a mole fraction unit that measures the number of nanomoles, or 10^[-9] mole, of one subcomponent of a sample relative to one micromole, or 10^[-6] mole, of either another subcomponent or of the entire sample.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: mole fraction unit
created: 2019-08-21 00:00:00.0
modified: 2020-05-13 13:24:54.0

reciprocal length unit
type: Concept
definition: a unit that is a measurement per unit length.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: unit
narrower: reciprocal meter
created: 2019-08-21 00:00:00.0
modified: 2020-05-13 13:24:54.0

reciprocal meter
type: Concept
definition: a reciprocal length unit that is one per one meter.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: reciprocal length unit
created: 2019-08-21 00:00:00.0
modified: 2020-05-13 13:24:54.0

coccolithophore assemblage
type: Concept
definition: an assemblage of organisms that are unicellular phytoplankton and belong to the kingdom Chromista, phylum Haptophyta, class Prymnesiophyceae.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: biological assemblage
related: climate reconstructions
created: 2019-08-21 00:00:00.0
modified: 2020-05-13 13:24:54.0

magnesium/lithium
type: Concept
definition: the elemental ratio of magnesium to lithium.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: element or compound ratio
related: climate reconstructions
created: 2019-08-21 00:00:00.0
modified: 2020-05-13 13:24:54.0

barite
type: Concept
definition: a sulfate mineral with the formula BaSO4.
in scheme: Paleoenvironmental Standard Terms (PaST) thesaurus
broader: identified mineral
related: paleoceanography
created: 2019-08-21 00:00:00.0
modified: 2020-05-13 13:24:54.0