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

Science
Frank LamyJoseph Stoner

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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Citations

Jul 19, 2008·Science·Robert P AckertDavid M Mickelson
Aug 15, 2014·Nature·Xu ZhangConor Purcell
Feb 13, 2016·Scientific Reports·Neil F GlasserStephan Harrison
Sep 30, 2015·Proceedings of the National Academy of Sciences of the United States of America·Frank LamyRalf Tiedemann
Jun 27, 2015·Scientific Reports·C J FogwillM H England
Mar 28, 2008·Molecular Ecology·Daniel E RuzzanteEmily D M Adams
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Jan 18, 2018·Mitochondrial DNA. Part A. DNA Mapping, Sequencing, and Analysis·Cristian B Canales-AguirreCristián E Hernández
Jun 26, 2004·Science·Jean Lynch-Stieglitz
Sep 18, 2004·Science·Amelia E ShevenellDavid W Lea

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