Extension of the stable oxygen isotope and density profile of the B26 ice core

DOI

The firn core array of the North Greenland Traverse (NGT) provides unique climatic information for North Greenland until the mid 1990ies. In order to extend this climate record into more recent time, some of the drill sites were revisited and extension cores were drilled. The record is a composite of snow liners (from the surface to 1.29 m depth) and a consecutive firn core from 1.47 m depth to 30.00 m depth with a diameter of 75 cm. Density was measured by weighing the 55 cm long bags. Stable oxygen isotopes (δ18O) were measured at the Niels Bohr Institute, Copenhagen, Denmark. Using raw, un-calibrated dielectrical profiling (DEP) data from the field (NEEM Set-up), volcanic tie points were derived. Together with the smoothed density data and the isotopic composition the record was dated by layer counting. The annual mean values of δ18O were obtained based on this dating. Based on the density measurements and the dating, the annual accumulation rate in water equivalent depth was derived.

This data set belongs to the data sets of firn cores B18_2012, B21_2012, B23_2012 and NGRIP_2012.

Identifier
DOI https://doi.org/10.1594/PANGAEA.945670
Related Identifier IsSupplementTo https://doi.org/10.5194/cp-8-2053-2012
Related Identifier IsSupplementTo https://doi.org/10.1038/s41586-022-05517-z
Related Identifier References https://doi.org/10.1594/PANGAEA.931746
Related Identifier References https://doi.org/10.1594/PANGAEA.931740
Related Identifier References https://doi.org/10.1594/PANGAEA.931744
Related Identifier References https://doi.org/10.1594/PANGAEA.931745
Metadata Access https://ws.pangaea.de/oai/provider?verb=GetRecord&metadataPrefix=datacite4&identifier=oai:pangaea.de:doi:10.1594/PANGAEA.945670
Provenance
Creator Vinther, Bo Møllesøe (ORCID: 0000-0002-6078-771X); Freitag, Johannes ORCID logo; Kipfstuhl, Sepp ORCID logo; Weißbach, Stefanie ORCID logo; Karlsson, Nanna Bjørnholt ORCID logo; Münch, Thomas ORCID logo; Hörhold, Maria ORCID logo
Publisher PANGAEA
Publication Year 2022
Funding Reference Agence Nationale de la Recherche https://doi.org/10.13039/501100001665 Crossref Funder ID 07-VULN-09-001 North Greenland Eemian Ice Drilling
Rights Creative Commons Attribution 4.0 International; https://creativecommons.org/licenses/by/4.0/
OpenAccess true
Representation
Resource Type Bundled Publication of Datasets; Collection
Format application/zip
Size 4 datasets
Discipline Geosciences; Geospheric Sciences; Glaciology; Natural Sciences
Spatial Coverage (-49.217 LON, 77.253 LAT); Greenland
Temporal Coverage Begin 2011-05-01T00:00:00Z
Temporal Coverage End 2011-08-31T00:00:00Z