The Greenland Ice Core Chronology 2005, 15-42 ka. Part 2: comparison to other records

Anders Svensson, Katrine Krogh Andersen, Matthias Bigler, Henrik B. Clausen, Dorthe Dahl-Jensen, Siwan M. Davies, Sigfus J. Johnsen, Raimund Muscheler, Sune O. Rasmussen, Regine Rothlisberger, Jorgen Peder Steffensen, Bo M. Vinther

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

A new Greenland Ice Core Chronology (GICC05) based on multi-parameter counting of annual layers has been obtained for the last 42 ka. Here we compare the glacial part of the new time scale, which is based entirely on records from the NorthGRIP ice core, to existing time scales and reference horizons covering the same period. These include the GRIP and NorthGRIP modelled time scales, the Meese-Sowers GISP2 counted time scale, the Shackleton-Fairbanks GRIP time scale (SFCP04) based on 14C calibration of a marine core, the Hulu Cave record, three volcanic reference horizons, and the Laschamp geomagnetic excursion event occurring around Greenland Interstadial 10. GICC05 is generally in good long-term agreement with the existing Greenland ice core chronologies and with the Hulu Cave record, but on shorter time scales there are significant discrepancies. Around the Last Glacial Maximum there is a more than I ka age difference between GICC05 and SFCP04 and a more than 0.5 ka discrepancy in the same direction between GICC05 and the age of a recently identified tephra layer in the NorthGRIP ice core. Both SFCP04 and the tephra age are based on 14 C-dated marine cores and fixed marine reservoir ages. For the Laschamp event, GICC05 agrees with a recent independent dating within the uncertainties. 
Original languageEnglish
JournalQuaternary Science Reviews
Volume25
Issue number23-24
Pages (from-to)3258-3267
Number of pages10
ISSN0277-3791
DOIs
Publication statusPublished - 2006
Externally publishedYes

Bibliographical note

© 2006 Elsevier Ltd. All rights reserved.

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