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

doi:doi:10.1594/PANGAEA.922139

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 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.

BibTex:

@dataset{Mojtabavi_Seyedhamidreza_and_Wilhelms_Frank_and_Cook_Eliza_and_Davies_Siwan_M_and_Sinnl_Giulia_and_Skov_Jensen_Mathias_and_Dahl-Jensen_Dorthe_and_Svensson_Anders_M_and_Vinther_Bo_Møllesøe_and_Kipfstuhl_Sepp_and_Karlsson_Nanna_Bjørnholt_and_Faria_Sergio_Henrique_and_Gkinis_Vasileios_and_Kjær_Helle_Astrid_and_Erhardt_Tobias_and_Berben_Sarah_M_P_and_Nisancioglu_Kerim_H_and_Koldtoft_Iben_and_Rasmussen_Sune_Olander_2020,
    abstract = {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.},
    author = {Mojtabavi, Seyedhamidreza and Wilhelms, Frank and Cook, Eliza and Davies, Siwan M and Sinnl, Giulia and Skov Jensen, Mathias and Dahl-Jensen, Dorthe and Svensson, Anders M and Vinther, Bo Møllesøe and Kipfstuhl, Sepp and Karlsson, Nanna Bjørnholt and Faria, Sergio Henrique and Gkinis, Vasileios and Kjær, Helle Astrid and Erhardt, Tobias and Berben, Sarah M P and Nisancioglu, Kerim H and Koldtoft, Iben and Rasmussen, Sune Olander},
    doi = {10.1594/PANGAEA.922139},
    institution = {PANGAEA (Atmosphere)},
    title = {Chronology for the East GReenland Ice-core Project (EGRIP)},
    url = {https://service.tib.eu/ldmservice/vdataset/png-doi-10-1594-pangaea-922139},
    year = {2020}
}