Antarctic timing of surface water changes off Chile and Patagonian ice sheet response

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doi: 10.1126/science.1097863
Author(s): Lamy, Frank; Kaiser, Jérôme; Ninnemann, Ulysses; Hebbeln, Dierk; Arz, Helge W.; Stoner, Joseph
Author Affiliation(s): Primary:
GeoForschungsZentrum-Potsdam, Potsdam, Federal Republic of Germany
Deutsche Forschungsgemeinschaft (DFG) Research Center Ocean Margins, Federal Republic of Germany
University of Bergen, Norway
University of Colorado, United States
Volume Title: Science
Source: Science, 304(5679), p.1959-1962. Publisher: American Association for the Advancement of Science, Washington, DC, United States. ISSN: 0036-8075 CODEN: SCIEAS
Note: In English. 32 refs.; illus., incl. sketch map
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.
Year of Publication: 2004
Research Program: ODP Ocean Drilling Program
Key Words: 24 Surficial Geology, Quaternary Geology; Antarctica; Argentina; Cenozoic; Chile; Climate change; Currents; Dansgaard-Oeschger cycles; East Pacific; Foraminifera; Glacial geology; Ice; Ice sheets; Invertebrata; Leg 202; Marine sediments; Microfossils; ODP Site 1233; Ocean Drilling Program; Ocean currents; Pacific Ocean; Paleo-oceanography; Paleoclimatology; Patagonia; Protista; Quaternary; Sea ice; Sea-surface temperature; Sediments; South America; South Pacific; Southeast Pacific; Thermohaline circulation
Coordinates: S420000 S400000 W0740000 W0760000
Record ID: 2004074125
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