CLIVASH2k Antarctic ice core chemistry database

This data compilation is a collaborative effort by the CLIVASH2k (Climate Variability in Antarctica and the Southern Hemisphere over the past 2000 years) working group, part of the PAGES2k network. The database is a compilation of sodium and sulphate records from Antarctic ice cores spanning the past 2000 years, and contains a combination of published records (sourced from public archives), and unpublished data submitted to the CLIVASH2k call.

All data are provided as annual averages (Jan-Dec). This database includes the annually resolved section of each original dataset (in the annual_resolution folder) and the coarser than annual sections (in the coarse_resolution folder). Annual averages for the oldest and most recent years were only included if the available data covered more than half of the year. All concentration values are presented in parts per billion (ppb). All flux values are presented in ppb by kilogram per square meter (ppb kg m-2). Data for each species are contained in separate CSV files; Sodium concentration (Na_concentration), Sodium flux (Na_flux), Sulphate concentration (SO4_concentration), Sulphate flux (SO4_flux), Excess Sulphate (xsSO4), Excess Sulphate flux (xsSO4_flux). Each file contains the data for all sites. The Excess Sulphate and Excess Sulphate flux calculations assume that all Na comes from the ocean (according to the standard seawater ion ratio as in [Holland, 1978]). Data were submitted in both the ionic (e.g. SO42-) and elemental forms (S). Elemental S has been converted to sulphate (SO42-) by multiplying by three.

A data description publication accompanies this database: Thomas et al., The CLIVASH2k ice core chemistry database: an Antarctic compilation of sodium and sulphate records spanning the past 2000 years. Earth System Science Data.

This database was created with the support of the CLIVASH2k project.

Alternate title: Polar Data Centre (PDC) record GB/NERC/BAS/PDC/01670

Date (Publication): 2023-06-22

Citation identifier: http://www.antarctica.ac.uk/dms/metadata.php?id= / GB/NERC/BAS/PDC/01670

Point of contact

Organisation name	Individual name	Electronic mail address	Role
British Antarctic Survey		pdc@bas.ac.uk	Custodian
NERC EDS UK Polar Data Centre	Thomas, E., Vladimirova, D., & Tetzner, D.	pdc@bas.ac.uk	Originator

Maintenance and update frequency: Unknown

Keywords

NDGO0001

NERC OAI Harvesting

NERC_DDC

GCMD Parameter Valids

EARTH SCIENCE > Paleoclimate > Ice Core Records
EARTH SCIENCE > Paleoclimate > Ice Core Records > Ions
EARTH SCIENCE > Paleoclimate > Ice Core Records > Isotopes

BAS Free-text keywords

Antarctica
CLIVASH2k
concentration
flux
ice core
sodium
sulphate

Use limitation: Data supplied under Open Government Licence v3.0 http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/.

We encourage the community to use this database. Once published, all data are free to use.

Please cite the data paper and data DOI when using this database. We also encourage users to cite the original data reference (see metadata table) where applicable.

Access constraints: Other restrictions

Other constraints: Data supplied under Open Government Licence v3.0 http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/.

We encourage the community to use this database. Once published, all data are free to use.

Please cite the data paper and data DOI when using this database. We also encourage users to cite the original data reference (see metadata table) where applicable.

Language: English

Topic category

Climatology, meteorology, atmosphere
Geoscientific information
Oceans

Begin date: -1-01-01

End date: 2019-12-31

Reference system identifier: OGP / urn:ogc:def:crs:EPSG::4326

Distribution format

Distributor contact

Organisation name	Individual name	Electronic mail address	Role
Polar Data Centre - British Antarctic Survey		pdc@bas.ac.uk	Distributor

OnLine resource

Protocol	Linkage	Name
http	https://ramadda.data.bas.ac.uk/repository/entry/show?entryid=9e0ed16e-f2ab-4372-8df3-fde7e388c9a7	GET DATA

Hierarchy level: Dataset

Domain consistency

Measure identification: INSPIRE / Conformity_001

Conformance result

Title: INSPIRE Data Specification on unknown theme Guidelines

Date

Explanation: See the referenced specification

Pass: No

Statement: -999.99, "NaN" and "zero" values were removed from the original datasets before calculating annual and coarser than annual averages. Annual averages for the oldest and most recent years were only included if the available data covered more than half of the year. Any missing numerical values are then represented as -999.99.

In the metadata table that describes the site information and references for the original contributing datasets, missing text values (e.g. dates) are represented as "N/A". The oldest and most recent years reported in the metadata table are based on the longest timespan among all species for each dataset. Flux records from some sites cover a shorter timespan due to shorter accumulation datasets.