Antarctic Timing of Surface Water Changes off Chile and Patagonian Ice Sheet Response

Marine sediments from the Chilean continental margin are used to infer millennial-scale changes in southeast Pacific surface ocean water properties and Patagonian ice sheet extent since the last glacial period. Our data show a clear “Antarctic” timing of sea surface temperature changes, which appear...

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Bibliographic Details
Published in:Science
Main Authors: Lamy, Frank, Kaiser, Jérôme, Ninnemann, Ulysses, Hebbeln, Dierk, Arz, Helge W., Stoner, Joseph
Format: Article in Journal/Newspaper
Language:English
Published: American Association for the Advancement of Science (AAAS) 2004
Subjects:
Antarctic
Pacific
Antarc*
Ice Sheet
Sea ice
Online Access:http://dx.doi.org/10.1126/science.1097863
https://www.science.org/doi/pdf/10.1126/science.1097863
Description
Summary:Marine sediments from the Chilean continental margin are used to infer millennial-scale changes in southeast Pacific surface ocean water properties and Patagonian ice sheet extent since the last glacial period. Our data show a clear “Antarctic” timing of sea surface temperature changes, which appear systematically linked to meridional displacements in sea ice, westerly winds, and the circumpolar current system. Proxy data for ice sheet changes show a similar pattern as oceanographic variations offshore, but reveal a variable glacier-response time of up to ∼1000 years, which may explain some of the current discrepancies among terrestrial records in southern South America.

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