Chronology for the East GReenland Ice-core Project (EGRIP)

DOI

This paper provides the first chronology for the deep ice core from the East GReenland Ice-core Project (EGRIP) over the Holocene and late last glacial period. We rely mainly on volcanic events and common patterns of peaks in dielectric profiling (DEP), electrical conductivity measurements (ECM) and tephra records for the synchronization between the EGRIP, NEEM and NGRIP ice cores in Greenland. We transfer the annual-layer-counted Greenland Ice Core Chronology 2005 (GICC05) timescale from the NGRIP core to the EGRIP ice core by means of 373 match points. The NEEM ice core is only used for supporting match-point identification. We name our EGRIP time scale GICC05-EGRIP-1. Over the uppermost 1383.84 m, we establish a depth–age relationship dating back to 14,965 a b2k (years before the year 2000 CE). Tephra horizons provide an independent validation of our match points. In addition, we compare the ratio of annual layer thicknesses between ice cores in-between the match points to assess our results in view of the different ice-flow patterns and accumulation regimes of the different periods and geographical regions. This initial timescale is the basis of interpretation and refinement of the presently derived EGRIP high-resolution data sets of chemical impurities.

Identifier
DOI https://doi.org/10.1594/PANGAEA.922139
Related Identifier https://doi.org/10.5194/cp-16-2359-2020
Metadata Access https://ws.pangaea.de/oai/provider?verb=GetRecord&metadataPrefix=datacite4&identifier=oai:pangaea.de:doi:10.1594/PANGAEA.922139
Provenance
Creator Mojtabavi, Seyedhamidreza ORCID logo; Wilhelms, Frank ORCID logo; Cook, Eliza ORCID logo; Davies, Siwan M ORCID logo; Sinnl, Giulia (ORCID: 0000-0003-1590-315X); Skov Jensen, Mathias; Dahl-Jensen, Dorthe ORCID logo; Svensson, Anders M ORCID logo; Vinther, Bo Møllesøe (ORCID: 0000-0002-6078-771X); Kipfstuhl, Sepp ORCID logo; Karlsson, Nanna Bjørnholt ORCID logo; Faria, Sergio Henrique; Gkinis, Vasileios ORCID logo; Kjær, Helle Astrid ORCID logo; Erhardt, Tobias ORCID logo; Berben, Sarah M P ORCID logo; Nisancioglu, Kerim H ORCID logo; Koldtoft, Iben ORCID logo; Rasmussen, Sune Olander ORCID logo
Publisher PANGAEA
Publication Year 2020
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 10 datasets
Discipline Earth System Research
Spatial Coverage (-51.060W, 75.100S, -35.980E, 77.450N); Greenland
Temporal Coverage Begin 1996-07-01T00:00:00Z
Temporal Coverage End 2009-08-20T00:00:00Z