Interhemispheric Atlantic seesaw response during the last deglaciation

Barker, Stephen and Diz, Paula and Vautravers, Maryline J. and Pike, Jennifer and Knorr, Gregor and Hall, Ian R. and Broecker, Wallace S. (2009) Interhemispheric Atlantic seesaw response during the last deglaciation. Nature, 457 (7233). pp. 1097-1102. DOI

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The asynchronous relationship between millennial-scale temperature changes over Greenland and Antarctica during the last glacial period has led to the notion of a bipolar seesaw which acts to redistribute heat depending on the state of meridional overturning circulation within the Atlantic Ocean. Here we present new records from the South Atlantic that show rapid changes during the last deglaciation that were instantaneous (within dating uncertainty) and of opposite sign to those observed in the North Atlantic. Our results demonstrate a direct link between the abrupt changes associated with variations in the Atlantic meridional overturning circulation and the more gradual adjustments characteristic of the Southern Ocean. These results emphasize the importance of the Southern Ocean for the development and transmission of millennial-scale climate variability and highlight its role in deglacial climate change and the associated rise in atmospheric carbon dioxide.

Item Type: Article
Uncontrolled Keywords: 08AREP; added in 2011
Subjects: 01 - Climate Change and Earth-Ocean Atmosphere Systems
Divisions: 01 - Climate Change and Earth-Ocean Atmosphere Systems
Journal or Publication Title: Nature
Volume: 457
Page Range: pp. 1097-1102
Identification Number:
Depositing User: Sarah Humbert
Date Deposited: 28 Jul 2011 16:46
Last Modified: 23 Jul 2013 10:02

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