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Article Dans Une Revue Climate of the Past Année : 2007

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

Résumé

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 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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Dates et versions

hal-00330765 , version 1 (18-06-2008)

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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, 2007, 3 (3), pp.541-547. ⟨10.5194/cp-3-541-2007⟩. ⟨hal-00330765⟩
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