Glacier expansion in southern Patagonia throughout the Antarctic cold reversal

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dc.contributor.authorGarcia, Juan L.
dc.contributor.authorKaplan, Michael R.
dc.contributor.authorHall, Brenda L.
dc.contributor.authorSchaefer, Joerg M.
dc.contributor.authorVega, Rodrigo M.
dc.contributor.authorSchwartz, Roseanne
dc.contributor.authorFinkel, Robert
dc.date.accessioned2024-01-10T12:39:14Z
dc.date.available2024-01-10T12:39:14Z
dc.date.issued2012
dc.description.abstractResolving 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 Be-10 exposure ages from moraines show that outlet glaciers in Torres del Paine (51 degrees 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 similar to 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.
dc.description.funderNational Geographic Society
dc.description.funderChurchill Exploration Fund
dc.description.funderGraduate Student Government at the University of Maine
dc.description.funderCorner Science and Education Foundation
dc.description.funderCONAF (Corporacion Nacional Forestal) Region de Magallanes
dc.description.funderTorres del Paine National Park (Chile)
dc.fechaingreso.objetodigital2024-05-14
dc.format.extent4 páginas
dc.fuente.origenWOS
dc.identifier.doi10.1130/G33164.1
dc.identifier.issn0091-7613
dc.identifier.urihttps://doi.org/10.1130/G33164.1
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/77163
dc.identifier.wosidWOS:000307919800023
dc.information.autorucGeografía;Garcia J;S/I;9823
dc.issue.numero9
dc.language.isoen
dc.nota.accesocontenido parcial
dc.pagina.final862
dc.pagina.inicio859
dc.publisherGEOLOGICAL SOC AMER, INC
dc.revistaGEOLOGY
dc.rightsacceso restringido
dc.subjectBE-10 PRODUCTION-RATE
dc.subjectATMOSPHERIC CO2
dc.subjectNEW-ZEALAND
dc.subjectLAST DEGLACIATION
dc.subjectCLIMATE-CHANGE
dc.subjectTERMINATION
dc.subjectFLUCTUATIONS
dc.subjectHOLOCENE
dc.subjectCHRONOLOGY
dc.subjectGREENLAND
dc.subject.ods13 Climate Action
dc.subject.odspa13 Acción por el clima
dc.titleGlacier expansion in southern Patagonia throughout the Antarctic cold reversal
dc.typeartículo
dc.volumen40
sipa.codpersvinculados9823
sipa.indexWOS
sipa.indexScopus
sipa.trazabilidadCarga SIPA;09-01-2024
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