"EDML1": a chronology for the EPICA deep ice core from Dronning Maud Land, Antarctica, over the last 150 000 years

Ruth, U.; Barnola, J.-M.; Beer, J.; Bigler, M.; Blunier, T.; Castellano, E.; Fischer, H.; Fundel, F.; Huybrechts, P.; Kaufmann, P.; Kipfstuhl, S.; Lambrecht, A.; Morganti, A.; Oerter, H.; Parrenin, F.; Rybak, O.; Severi, M.; Udisti, R.; Wilhelms, F.; Wolff, Eric W.. 2007 "EDML1": a chronology for the EPICA deep ice core from Dronning Maud Land, Antarctica, over the last 150 000 years. Climate of the Past, 3 (3). 475-484. https://doi.org/10.5194/cp-3-475-2007

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Abstract/Summary

A chronology called EDML1 has been developed for the EPICA ice core from Dronning Maud Land (EDML). EDML1 is closely interlinked with EDC3, the new chronology for the EPICA ice core from Dome-C (EDC) through a stratigraphic match between EDML and EDC that consists of 322 volcanic match points over the last 128 ka. The EDC3 chronology comprises a glaciological model at EDC, which is constrained and later selectively tuned using primary dating information from EDC as well as from EDML, the latter being transferred using the tight stratigraphic link between the two cores. Finally, EDML1 was built by exporting EDC3 to EDML. For ages younger than 41 ka BP the new synchronized time scale EDML1/EDC3 is based on dated volcanic events and on a match to the Greenlandic ice core chronology GICC05 via Be-10 and methane. The internal consistency between EDML1 and EDC3 is estimated to be typically similar to 6 years and always less than 450 years over the last 128 ka (always less than 130 years over the last 60 ka), which reflects an unprecedented synchrony of time scales. EDML1 ends at 150 ka BP (2417 m depth) because the match between EDML and EDC becomes ambiguous further down. This hints at a complex ice flow history for the deepest 350 m of the EDML ice core.

Item Type:	Publication - Article
Digital Object Identifier (DOI):	https://doi.org/10.5194/cp-3-475-2007
Programmes:	BAS Programmes > Global Science in the Antarctic Context (2005-2009) > Climate and Chemistry - Forcings and Phasings in the Earth System
ISSN:	1814-9324
Additional Information. Not used in RCUK Gateway to Research.:	Open access article made available under a CC-BY Creative Commons Attribution license.
NORA Subject Terms:	Glaciology Earth Sciences
Date made live:	21 Oct 2011 09:45 +0 (UTC)
URI:	https://nora.nerc.ac.uk/id/eprint/11917

Item Type:

Publication - Article

Digital Object Identifier (DOI):

https://doi.org/10.5194/cp-3-475-2007

Programmes:

BAS Programmes > Global Science in the Antarctic Context (2005-2009) > Climate and Chemistry - Forcings and Phasings in the Earth System

ISSN:

1814-9324

Additional Information. Not used in RCUK Gateway to Research.:

Open access article made available under a CC-BY Creative Commons Attribution license.

NORA Subject Terms:

Glaciology
Earth Sciences