Articles | Volume 3, issue 3
https://doi.org/10.5194/cp-3-541-2007
https://doi.org/10.5194/cp-3-541-2007
07 Sep 2007
 | 07 Sep 2007

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

G. M. Raisbeck, F. Yiou, J. Jouzel, and T. F. Stocker

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 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.