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

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...

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Bibliographic Details
Main Authors: Mojtabavi, Seyedhamidreza, Wilhelms, Frank, Cook, Eliza, Davies, Siwan M, Sinnl, Giulia, Skov Jensen, Mathias, Dahl-Jensen, Dorthe, Svensson, Anders M, Vinther, Bo Møllesøe, Kipfstuhl, Sepp, Karlsson, Nanna Bjørnholt, Faria, Sergio Henrique, Gkinis, Vasileios, Kjær, Helle Astrid, Erhardt, Tobias, Berben, Sarah M P, Nisancioglu, Kerim H, Koldtoft, Iben, Rasmussen, Sune Olander
Format: Dataset
Language:English
Published: PANGAEA 2020
Subjects:
AWI Arctic Land Expedition
East Greenland Ice-core Project
EastGRIP
EGRIP
EGRIP_2017
EGRIP_2018
EGRIP_2019
GL-Land_2017_EGRIP
GL-Land_2018_EGRIP
GL-Land_2019_EGRIP
Greenland
ICEDRILL
Ice drill
Arctic
East Greenland
Greenland ice core
Greenland Ice core Project
ice core
NGRIP
Online Access:https://doi.pangaea.de/10.1594/PANGAEA.922139
https://doi.org/10.1594/PANGAEA.922139
Description
Summary: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.

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