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

• Main Authors: Raisbeck, G. M., Yiou, F., Jouzel, J., Stocker, T. F.
• Other Authors: Laboratoire des Sciences du Climat et de l'Environnement (LSCE), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)
• Format: Article in Journal/Newspaper
• Language: English
• Published: HAL CCSD 2007
• Subjects: Earth Science; [SDU]Sciences of the Universe [physics]; Antarc*; Antarctic; Antarctica; EPICA; Greenland; GRIP; ice core
• Online Access: https://hal.science/hal-04110180; https://doi.org/10.5194/cp-3-541-200710.5194/cpd-3-755-2007

International audience A new, decadally resolved record of the 10 Be 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.