Direct north-south synchronization of abrupt climate change record in ice cores using Beryllium 10

A new, decadally resolved record of the 10 Be peak at 41 kyr from the EPICA Dome C ice core (Antarctica) is used to match it with the same peak in the GRIP ice core (Greenland). This permits a direct synchronisation of the climatic variations around this time period, independent of uncertainties rel...

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Bibliographic Details
Main Authors: G. M. Raisbeck, F. Yiou, J. Jouzel, T. F. Stocker
Format: Article in Journal/Newspaper
Language:English
Published: Copernicus Publications 2007
Subjects:
Environmental pollution
TD172-193.5
Environmental protection
TD169-171.8
Environmental sciences
GE1-350
Antarctic
Greenland
Antarc*
Antarctica
EPICA
GRIP
ice core
Online Access:https://doaj.org/article/37413a5839c546d3860b389727cf30e9
Description
Summary:A new, decadally resolved record of the 10 Be peak at 41 kyr from the EPICA Dome C ice core (Antarctica) is used to match it with the same peak in the GRIP ice core (Greenland). This permits a direct synchronisation of the climatic variations around this time period, independent of uncertainties related to the ice age-gas age difference in ice cores. Dansgaard-Oeschger event 10 is in the period of best synchronisation and is found to be coeval with an Antarctic temperature maximum. Simulations using a thermal bipolar seesaw model agree reasonably well with the observed relative climate chronology in these two cores. They also reproduce three Antarctic warming events observed between A1 and A2.

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