version française rss feed
HAL : hal-00330733, version 1

Fiche détaillée  Récupérer au format
Climate of the Past Discussions 3, 3 (2007) 755-769
Direct North-South synchronization of abrupt climate change record in ice cores using beryllium 10
G. M. Raisbeck1, F. Yiou1, J. Jouzel2, T. F. Stocker3

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.
1 :  CSNSM - Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse
2 :  IPSL - Institut Pierre-Simon-Laplace
3 :  Climate and Environmental Physics [Bern]
Planète et Univers/Interfaces continentales, environnement

Planète et Univers/Sciences de la Terre
Liste des fichiers attachés à ce document : 
cpd-3-755-2007.pdf(295.9 KB)