TY - JOUR

T1 - Synchronizing ice cores from the Renland and Agassiz ice caps to the Greenland Ice Core Chronology

AU - Vinther, Bo Møllesøe

AU - Clausen, Henrik Brink

AU - Fischer, D. A.

AU - Koerner, R. M.

AU - Johnsen, Sigfus Johann

AU - Andersen, Katrine Krogh

AU - Dahl-Jensen, Dorthe

AU - Rasmussen, Sune Olander

AU - Steffensen, Jørgen Peder

AU - Svensson, Anders

N1 - Paper id:: doi:10.1029/2007JD009143

PY - 2008

Y1 - 2008

N2 - Four ice cores from the Agassiz ice cap in the Canadian high arctic and one ice corefrom the Renland ice cap in eastern Greenland have been synchronized to theGreenland Ice Core Chronology 2005 (GICC05) which is based on annual layer countsin the DYE-3, GRIP and NGRIP ice cores. Volcanic reference horizons, seen in electricalconductivity measurements (ECM) have been used to carry out the synchronizationthroughout the Holocene. The Agassiz ice cores have been matched to the NGRIP ice coreECM signal, while the Renland core has been matched to the GRIP ice core ECM signal,thus tying the cores to GICC05. Furthermore, it has been possible to synchronize theRenland ice core to NGRIP-GICC05 in the glacial period back to 60,000 years b2k(years before A.D. 2000), on the basis of a matching of transitions between stadials andinterstadials. This work brings the total number of ice core records that have beenrigorously tied to the GICC05 timescale up to nine. Renland annual layer thicknessesare increasing with depth during the period from 7 to 8.5 ka b2k, a highly unusualobservation only matched by a similar thickness increase in the glacial section of theRenland core some 60 ka ago. Annual layer thicknesses in the Agassiz ice cores point toa well-developed Raymond bump in the Agassiz ice cap.

AB - Four ice cores from the Agassiz ice cap in the Canadian high arctic and one ice corefrom the Renland ice cap in eastern Greenland have been synchronized to theGreenland Ice Core Chronology 2005 (GICC05) which is based on annual layer countsin the DYE-3, GRIP and NGRIP ice cores. Volcanic reference horizons, seen in electricalconductivity measurements (ECM) have been used to carry out the synchronizationthroughout the Holocene. The Agassiz ice cores have been matched to the NGRIP ice coreECM signal, while the Renland core has been matched to the GRIP ice core ECM signal,thus tying the cores to GICC05. Furthermore, it has been possible to synchronize theRenland ice core to NGRIP-GICC05 in the glacial period back to 60,000 years b2k(years before A.D. 2000), on the basis of a matching of transitions between stadials andinterstadials. This work brings the total number of ice core records that have beenrigorously tied to the GICC05 timescale up to nine. Renland annual layer thicknessesare increasing with depth during the period from 7 to 8.5 ka b2k, a highly unusualobservation only matched by a similar thickness increase in the glacial section of theRenland core some 60 ka ago. Annual layer thicknesses in the Agassiz ice cores point toa well-developed Raymond bump in the Agassiz ice cap.

U2 - 10.1029/2007JD009143

DO - 10.1029/2007JD009143

M3 - Journal article

VL - 113

JO - Journal of Geophysical Research: Solid Earth

JF - Journal of Geophysical Research: Solid Earth

SN - 0148-0227

IS - D08115

ER -