Asynchrony of Antarctic and Greenland climate change during the last glacial period

T. Blunier (), J. Chappellaz, J. Schwander, A. Dällenbach, B. Stauffer, T. F. Stocker, D. Raynaud, J. Jouzel, H. B. Clausen, C. U. Hammer and S. J. Johnsen
Additional contact information
T. Blunier: Climate and Environmental Physics, Physics Institute, University of Bern
J. Chappellaz: CNRS Laboratoire de Glaciologie et Géophysique de l'Environnement (LGGE)
J. Schwander: Climate and Environmental Physics, Physics Institute, University of Bern
A. Dällenbach: Climate and Environmental Physics, Physics Institute, University of Bern
B. Stauffer: Climate and Environmental Physics, Physics Institute, University of Bern
T. F. Stocker: Climate and Environmental Physics, Physics Institute, University of Bern
D. Raynaud: CNRS Laboratoire de Glaciologie et Géophysique de l'Environnement (LGGE)
J. Jouzel: CNRS Laboratoire de Glaciologie et Géophysique de l'Environnement (LGGE)
H. B. Clausen: Department of Geophysics (NBIfAPG) University of Copenhagen
C. U. Hammer: Department of Geophysics (NBIfAPG) University of Copenhagen
S. J. Johnsen: Department of Geophysics (NBIfAPG) University of Copenhagen

Nature, 1998, vol. 394, issue 6695, 739-743

Abstract: Abstract A central issue in climate dynamics is to understand how the Northern and Southern hemispheres are coupled during climate events. The strongest of the fast temperature changes observed in Greenland (so-called Dansgaard–Oeschger events) during the last glaciation have an analogue in the temperature record from Antarctica. A comparison of the global atmospheric concentration of methane as recorded in ice cores from Antarctica and Greenland permits a determination of the phase relationship (in leads or lags) of these temperature variations. Greenland warming events around 36 and 45 kyr before present lag their Antarctic counterpart by more than 1 kyr. On average, Antarctic climate change leads that of Greenland by 1–2.5 kyr over the period 47–23 kyr before present.

Date: 1998
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DOI: 10.1038/29447

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