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Direct North-South synchronization of abrupt climate change record in ice cores using beryllium 10

Abstract : A new, decadally resolved record of the 10Be 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 41 kyr BP, 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 between A1 and A2.
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https://hal.archives-ouvertes.fr/hal-00330733
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Submitted on : Friday, May 11, 2007 - 8:00:00 AM
Last modification on : Sunday, June 26, 2022 - 11:48:47 AM
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  • HAL Id : hal-00330733, version 1

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G. M. Raisbeck, F. Yiou, Jean Jouzel, T. F. Stocker. Direct North-South synchronization of abrupt climate change record in ice cores using beryllium 10. Climate of the Past Discussions, European Geosciences Union (EGU), 2007, 3 (3), pp.755-769. ⟨hal-00330733⟩

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