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Climate of the Past An interactive open-access journal of the European Geosciences Union
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Volume 3, issue 3 | Copyright

Special issue: The EPICA (EDC and EDML) ice cores age scales

Clim. Past, 3, 541-547, 2007
https://doi.org/10.5194/cp-3-541-2007
© Author(s) 2007. This work is licensed under
the Creative Commons Attribution-NonCommercial-ShareAlike 2.5 License.

  07 Sep 2007

07 Sep 2007

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

G. M. Raisbeck1, F. Yiou1, J. Jouzel2, and T. F. Stocker3 G. M. Raisbeck et al.
  • 1Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse, IN2P3-CNRS-Université de Paris-Sud, Bât. 108, 91405 Orsay, France
  • 2IPSL/LSCE, UMR CEA-CNRS-UVSQ, CE Saclay, 91191 Gif-sur-Yvette, France
  • 3Climate and Environmental Physics, Physics Institute, University of Bern, Sidlerstrasse 5, 3012 Bern, Switzerland

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.

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