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Glacier expansion in southern Patagonia throughout the Antarctic cold reversal

2012; Geological Society of America; Volume: 40; Issue: 9 Linguagem: Inglês

10.1130/g33164.1

1943-2682

Juan‐Luis García, Michael R. Kaplan, Brenda L. Hall, Joerg M. Schaefer, Rodrigo Vega, Roseanne Schwartz, Robert C. Finkel,

Polar Research and Ecology

Research Article| September 01, 2012 Glacier expansion in southern Patagonia throughout the Antarctic cold reversal Juan L. García; Juan L. García * 1Instituto de Geografía, Facultad de Historia, Geografía y Ciencia Política, Pontificia Universidad Católica de Chile, Campus San Joaquín, Avenida Vicuña Mackenna 4860, comuna Macul, Santiago 782-0436, Chile *E-mail: jgarciab@uc.cl. Search for other works by this author on: GSW Google Scholar Michael R. Kaplan; Michael R. Kaplan 2Geochemistry, Lamont-Doherty Earth Observatory, Palisades, New York 10964, USA Search for other works by this author on: GSW Google Scholar Brenda L. Hall; Brenda L. Hall 3Earth Sciences Department and Climate Change Institute, University of Maine, Orono, Maine 04469, USA Search for other works by this author on: GSW Google Scholar Joerg M. Schaefer; Joerg M. Schaefer 2Geochemistry, Lamont-Doherty Earth Observatory, Palisades, New York 10964, USA Search for other works by this author on: GSW Google Scholar Rodrigo M. Vega; Rodrigo M. Vega 4Instituto de Ciencias de la Tierra y Evolución, Universidad Austral de Chile, Campus Isla Teja, Valdivia, Chile Search for other works by this author on: GSW Google Scholar Roseanne Schwartz; Roseanne Schwartz 2Geochemistry, Lamont-Doherty Earth Observatory, Palisades, New York 10964, USA Search for other works by this author on: GSW Google Scholar Robert Finkel Robert Finkel 5Earth and Planetary Science Department, University of California–Berkeley, Berkeley, California 94720, USA Search for other works by this author on: GSW Google Scholar Author and Article Information Juan L. García * 1Instituto de Geografía, Facultad de Historia, Geografía y Ciencia Política, Pontificia Universidad Católica de Chile, Campus San Joaquín, Avenida Vicuña Mackenna 4860, comuna Macul, Santiago 782-0436, Chile Michael R. Kaplan 2Geochemistry, Lamont-Doherty Earth Observatory, Palisades, New York 10964, USA Brenda L. Hall 3Earth Sciences Department and Climate Change Institute, University of Maine, Orono, Maine 04469, USA Joerg M. Schaefer 2Geochemistry, Lamont-Doherty Earth Observatory, Palisades, New York 10964, USA Rodrigo M. Vega 4Instituto de Ciencias de la Tierra y Evolución, Universidad Austral de Chile, Campus Isla Teja, Valdivia, Chile Roseanne Schwartz 2Geochemistry, Lamont-Doherty Earth Observatory, Palisades, New York 10964, USA Robert Finkel 5Earth and Planetary Science Department, University of California–Berkeley, Berkeley, California 94720, USA *E-mail: jgarciab@uc.cl. Publisher: Geological Society of America Received: 29 Dec 2011 Revision Received: 08 Apr 2012 Accepted: 10 Apr 2012 First Online: 09 Mar 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 © 2012 Geological Society of America Geology (2012) 40 (9): 859–862. https://doi.org/10.1130/G33164.1 Article history Received: 29 Dec 2011 Revision Received: 08 Apr 2012 Accepted: 10 Apr 2012 First Online: 09 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Juan L. García, Michael R. Kaplan, Brenda L. Hall, Joerg M. Schaefer, Rodrigo M. Vega, Roseanne Schwartz, Robert Finkel; Glacier expansion in southern Patagonia throughout the Antarctic cold reversal. Geology 2012;; 40 (9): 859–862. doi: https://doi.org/10.1130/G33164.1 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGeology Search Advanced Search Abstract Resolving debated climate changes in the southern middle latitudes and potential teleconnections between southern temperate and polar latitudes during the last glacial-interglacial transition is required to help understand the cause of the termination of ice ages. Outlet glaciers of the Patagonian Ice Fields are primarily sensitive to atmospheric temperature and also precipitation, thus former ice margins record the extent and timing of past climate changes. 38 10Be exposure ages from moraines show that outlet glaciers in Torres del Paine (51°S, south Patagonia, Chile) advanced during the time of the Antarctic cold reversal (ACR; ca. 14.6–12.8 ka), reaching a maximum extent by ∼14,200 ± 560 yr ago. The evidence here indicates that the South Patagonian Ice Field was responding to late glacial climate change distinctly earlier than the onset of the European Younger Dryas stadial (ca. 12.9 ka). Major glacier recession and deglaciation in the Torres del Paine region occurred by 12.5 ka and thus early in the Younger Dryas. We provide direct evidence for extensive ice in Patagonia at the very start of the ACR that agrees with atmospheric and marine records from the Southern Ocean and Antarctica. Atmospheric conditions responsible for the early late glacial expansion at Torres del Paine resulted from a climate reorganization that prompted a northern migration of the south westerly wind belt to the latitude of Torres del Paine at the onset of the ACR chronozone. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.