Asynchrony of antarctic and greenland climate change during the last glacial period

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 glaclation have an analogue in the temperature...

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Bibliographic Details
Published in:Nature
Main Authors: Blunier, T., Chappellaz, J., Schwander, J., Dallenbach, A., Stauffer, B., Stocker, T. F., Raynaud, D., Jouzel, J., Clausen, H. B., Hammer, C. U., Johnsen, S. J.
Format: Text
Language:unknown
Published: London, Springer Science and Business Media LLC 2022
Subjects:
Antarctic
Greenland
Antarc*
Antarctica
Dansgaard-Oeschger events
Online Access:https://doi.org/10.1038/29447
http://infoscience.epfl.ch/record/298277
Description
Summary: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 glaclation 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.

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