AI Article Synopsis
- Marine sediments from the Chilean continental margin reveal changes in Pacific Ocean water properties and the extent of the Patagonian ice sheet since the last glacial period.
- The data indicates a synchronized pattern of sea surface temperature changes linked to shifts in sea ice, wind patterns, and ocean currents.
- Proxy measurements suggest that while oceanographic variations align with ice sheet changes, the glaciers respond with a time lag of up to 1000 years, contributing to inconsistencies in southern South America's terrestrial records.
Article Abstract
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 approximately 1000 years, which may explain some of the current discrepancies among terrestrial records in southern South America.
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| http://dx.doi.org/10.1126/science.1097863 | DOI Listing |
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