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

• Main Authors: G. M. Raisbeck, F. Yiou, J. Jouzel, T. F. Stocker
• Format: Article in Journal/Newspaper
• Language: English
• Published: Copernicus Publications 2007
• Subjects: geo; envir; Antarctic; Greenland; Antarc*; Antarctica; EPICA; GRIP; ice core
• Online Access: http://www.clim-past.net/3/541/2007/cp-3-541-2007.pdf; https://doaj.org/article/37413a5839c546d3860b389727cf30e9

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.