A new 27 ky high resolution East Antarctic climate record

• Published in: Geophysical Research Letters
• Main Authors: Jouzel, J., Masson, V., Cattani, O., Falourd, S., Stievenard, M., Stenni, B., Longinelli, A., Johnsen, S., Steffenssen, J., Petit, J., Schwander, J., Souchez, R., Barkov, N.
• Other Authors: Laboratoire des Sciences du Climat et de l'Environnement Gif-sur-Yvette (LSCE), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Glaces et Continents, Climats et Isotopes Stables (GLACCIOS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Géochrononologie Traceurs Archéométrie (GEOTRAC), Department of Geological, Environmental and Marine Sciences Trieste, Università degli studi di Trieste = University of Trieste
• Format: Article in Journal/Newspaper
• Language: English
• Published: HAL CCSD 2001
• Subjects: [SDU.OCEAN]Sciences of the Universe [physics]/Ocean; Atmosphere; [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces; environment; Antarc*; Antarctic; Antarctica; East Antarctica; EPICA; Greenland; ice core; North Atlantic
• Online Access: https://hal.science/hal-03101408; https://hal.science/hal-03101408/document; https://hal.science/hal-03101408/file/2000GL012243.pdf; https://doi.org/10.1029/2000GL012243

International audience The ice core recently drilled at the Dome Concordia site on the East Antarctic plateau provides a new high resolution isotope record covering part of the last glacial, the last transition and the Holocene. The two step shape of the deglaciation is remarkably similar for all the ice cores now available on the East Antarctic plateau. The first warming trend ends about 14000 years ago and is followed by the well marked Antarctic Cold Reversal (ACR) with a secondary peak common to all records. During the deglaciation, there are more similarities between the near coastal site of Taylor Dome and inland East Antarctica than between Taylor Dome and central Greenland. However, the results for EPICA do appear to confirm the Taylor Dome timescale after about 14 ka, showing cooling into the ACR roughly in phase between Greenland and Antarctica. While the overall deglacial pattem is asynchronous, this suggests that the now classical picture of a temperature seesaw between Antarctica and Greenland may be too simplistic. 1. Introduction Whereas numerous deep-sea, continental and ice core records covering the last deglaciation are now available [e.g. Alley and Clark, 1999], the driving mechanisms of this climatic transition are still not fully understood. Recent studies highlight the central role of the huge unstable Northern Hemisphere ice caps and their interaction with the oceanic thermohaline circulation in the North Atlantic. They also reveal that the Antarctic deglacial warming started before the sharp Greenland warming marking the onset of the B611ing and was interrupted by the so-called Antarctic Cold Reversal [hereafter ACR; Jouzel et al., 1995].