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Nearly synchronous climate change in the Northern Hemisphere during the last glacial termination

Nature

By:
, , , ,
DOI: 10.1038/40838

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Abstract

The climate of the North Atlantic region underwent a series of abrupt cold/warm oscillations when the ice sheets of the Northern Hemisphere retreated during the last glacial termination (17.711.5 kyr ago). Evidence for these oscillations, which are recorded in European terrestrial sediments as the Oldest Dryas/Bolling/Older Dryas/Allerod/Younger Dryas vegetational sequence, has been found in Greenland ice cores. The geographical extent of many of these oscillations is not well known, but the last major cold event (the Younger Dryas) seems to have been global in extent. Here we present evidence of four major oscillations in the hydrological balance of the Owens basin, California, that occurred during the last glacial termination. Dry events in western North America occurred at approximately the same time as cold events recorded in Greenland ice, with transitions between climate regimes in the two regions taking place within a few hundred years of each other. Our observations thus support recent climate simulations which indicate that cooling of the North Atlantic Ocean results in cooling of the North Pacific Ocean which, in turn, leads to a drier climate in western North America.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Nearly synchronous climate change in the Northern Hemisphere during the last glacial termination
Series title:
Nature
DOI:
10.1038/40838
Volume
388
Issue:
6639
Year Published:
1997
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
First page:
263
Last page:
265
Number of Pages:
3