Extensive early deglaciation and paleolake history of the Río Cisnes Ice Lobe, Patagonian Ice Sheet 44°S
The timing, structure, and landscape change during the Patagonian Ice Sheet deglaciation remains unresolved. In this article, we provide a geomorphic, stratigraphic, and geochronological deglacial record of Río Cisnes Glacier at 44°S and also from the nearby Río Ñirehuao and Río El Toqui valleys (45...
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ftconicet:oai:ri.conicet.gov.ar:11336/169882 2023-10-09T21:47:16+02:00 Extensive early deglaciation and paleolake history of the Río Cisnes Ice Lobe, Patagonian Ice Sheet 44°S García, Juan Luis Maldonado, Antonio J. de Porras, Maria Eugenia Nuevo Delaunay, Amalia Reyes, Omar Ebensperger, Claudia A Binnie, Steven A. Lüthgens Christopher Mendez, Cesar application/pdf http://hdl.handle.net/11336/169882 eng eng Academic Press Inc Elsevier Science info:eu-repo/semantics/altIdentifier/url/https://www.cambridge.org/core/journals/quaternary-research/article/abs/early-deglaciation-and-paleolake-history-of-rio-cisnes-glacier-patagonian-ice-sheet-44s/3F8F57C5872C760113C6B907CA53643E info:eu-repo/semantics/altIdentifier/doi/10.1017/qua.2018.93 http://hdl.handle.net/11336/169882 García, Juan Luis; Maldonado, Antonio J.; de Porras, Maria Eugenia; Nuevo Delaunay, Amalia; Reyes, Omar; et al.; Extensive early deglaciation and paleolake history of the Río Cisnes Ice Lobe, Patagonian Ice Sheet 44°S; Academic Press Inc Elsevier Science; Quaternary Research; 91; 1; 1-2019; 194-217 0033-5894 CONICET Digital CONICET info:eu-repo/semantics/restrictedAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ 10BE DATING 14C DATING GLACIAL GEOMORPHOLOGY LAST DEGLACIATION LAST GLACIAL-INTERGLACIAL TRANSITION LAST TERMINATION OSL DATING PALEOLAKES PATAGONIA PATAGONIAN ICE SHEET https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 info:eu-repo/semantics/article info:ar-repo/semantics/artículo info:eu-repo/semantics/publishedVersion ftconicet https://doi.org/10.1017/qua.2018.93 2023-09-24T19:43:15Z The timing, structure, and landscape change during the Patagonian Ice Sheet deglaciation remains unresolved. In this article, we provide a geomorphic, stratigraphic, and geochronological deglacial record of Río Cisnes Glacier at 44°S and also from the nearby Río Ñirehuao and Río El Toqui valleys (45°S) in Chilean Patagonia. Our 14C, 10Be, and optically stimulated luminescence data indicate that after the last glacial maximum, Río Cisnes Glacier experienced ∼100 km deglaciation between >19.0 and 12.3 ka, accompanied by the formation of large glacial paleolakes. Deglaciation was interrupted by several ice readvances, and by 16.9±0.3 ka, Río Cisnes Glacier extended only ∼40% of its full glacial extent. The deglaciation of Río Cisnes Glacier and other sensitive Patagonian glaciers occurred at least 1 ka earlier than the ca. 17.8 ka normally assumed for the local termination, coincident with West Antarctic isotope records. This early deglaciation can be linked to an orbital forcing-driven decline of Southern Ocean sea ice associated with a distinct atmospheric warming that is apparent for West Antarctica through Patagonia. Fil: García, Juan Luis. Pontificia Universidad Católica de Chile; Chile Fil: Maldonado, Antonio J. Comisión Nacional de Investigación Científica y Tecnológica. Centro de Investigación Regional. Centro de Estudios en Zonas Áridas; Chile Fil: de Porras, Maria Eugenia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Provincia de Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Universidad Nacional de Cuyo. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales; Argentina. Comisión Nacional de Investigación Científica y Tecnológica. Centro de Investigación Regional. Centro de Estudios en Zonas Áridas; Chile Fil: Nuevo Delaunay, Amalia. Centro de Investigación de Ecosistemas de la Patagonia; Chile Fil: Reyes, Omar. ... Article in Journal/Newspaper Antarc* Antarctic Antarctica Ice Sheet Sea ice Southern Ocean West Antarctica CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) Antarctic Southern Ocean Patagonia West Antarctica Argentino Argentina El Toqui ENVELOPE(-60.783,-60.783,-62.467,-62.467) Quaternary Research 91 1 194 217 |
institution |
Open Polar |
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CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) |
op_collection_id |
ftconicet |
language |
English |
topic |
10BE DATING 14C DATING GLACIAL GEOMORPHOLOGY LAST DEGLACIATION LAST GLACIAL-INTERGLACIAL TRANSITION LAST TERMINATION OSL DATING PALEOLAKES PATAGONIA PATAGONIAN ICE SHEET https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 |
spellingShingle |
10BE DATING 14C DATING GLACIAL GEOMORPHOLOGY LAST DEGLACIATION LAST GLACIAL-INTERGLACIAL TRANSITION LAST TERMINATION OSL DATING PALEOLAKES PATAGONIA PATAGONIAN ICE SHEET https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 García, Juan Luis Maldonado, Antonio J. de Porras, Maria Eugenia Nuevo Delaunay, Amalia Reyes, Omar Ebensperger, Claudia A Binnie, Steven A. Lüthgens Christopher Mendez, Cesar Extensive early deglaciation and paleolake history of the Río Cisnes Ice Lobe, Patagonian Ice Sheet 44°S |
topic_facet |
10BE DATING 14C DATING GLACIAL GEOMORPHOLOGY LAST DEGLACIATION LAST GLACIAL-INTERGLACIAL TRANSITION LAST TERMINATION OSL DATING PALEOLAKES PATAGONIA PATAGONIAN ICE SHEET https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 |
description |
The timing, structure, and landscape change during the Patagonian Ice Sheet deglaciation remains unresolved. In this article, we provide a geomorphic, stratigraphic, and geochronological deglacial record of Río Cisnes Glacier at 44°S and also from the nearby Río Ñirehuao and Río El Toqui valleys (45°S) in Chilean Patagonia. Our 14C, 10Be, and optically stimulated luminescence data indicate that after the last glacial maximum, Río Cisnes Glacier experienced ∼100 km deglaciation between >19.0 and 12.3 ka, accompanied by the formation of large glacial paleolakes. Deglaciation was interrupted by several ice readvances, and by 16.9±0.3 ka, Río Cisnes Glacier extended only ∼40% of its full glacial extent. The deglaciation of Río Cisnes Glacier and other sensitive Patagonian glaciers occurred at least 1 ka earlier than the ca. 17.8 ka normally assumed for the local termination, coincident with West Antarctic isotope records. This early deglaciation can be linked to an orbital forcing-driven decline of Southern Ocean sea ice associated with a distinct atmospheric warming that is apparent for West Antarctica through Patagonia. Fil: García, Juan Luis. Pontificia Universidad Católica de Chile; Chile Fil: Maldonado, Antonio J. Comisión Nacional de Investigación Científica y Tecnológica. Centro de Investigación Regional. Centro de Estudios en Zonas Áridas; Chile Fil: de Porras, Maria Eugenia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Provincia de Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Universidad Nacional de Cuyo. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales; Argentina. Comisión Nacional de Investigación Científica y Tecnológica. Centro de Investigación Regional. Centro de Estudios en Zonas Áridas; Chile Fil: Nuevo Delaunay, Amalia. Centro de Investigación de Ecosistemas de la Patagonia; Chile Fil: Reyes, Omar. ... |
format |
Article in Journal/Newspaper |
author |
García, Juan Luis Maldonado, Antonio J. de Porras, Maria Eugenia Nuevo Delaunay, Amalia Reyes, Omar Ebensperger, Claudia A Binnie, Steven A. Lüthgens Christopher Mendez, Cesar |
author_facet |
García, Juan Luis Maldonado, Antonio J. de Porras, Maria Eugenia Nuevo Delaunay, Amalia Reyes, Omar Ebensperger, Claudia A Binnie, Steven A. Lüthgens Christopher Mendez, Cesar |
author_sort |
García, Juan Luis |
title |
Extensive early deglaciation and paleolake history of the Río Cisnes Ice Lobe, Patagonian Ice Sheet 44°S |
title_short |
Extensive early deglaciation and paleolake history of the Río Cisnes Ice Lobe, Patagonian Ice Sheet 44°S |
title_full |
Extensive early deglaciation and paleolake history of the Río Cisnes Ice Lobe, Patagonian Ice Sheet 44°S |
title_fullStr |
Extensive early deglaciation and paleolake history of the Río Cisnes Ice Lobe, Patagonian Ice Sheet 44°S |
title_full_unstemmed |
Extensive early deglaciation and paleolake history of the Río Cisnes Ice Lobe, Patagonian Ice Sheet 44°S |
title_sort |
extensive early deglaciation and paleolake history of the río cisnes ice lobe, patagonian ice sheet 44°s |
publisher |
Academic Press Inc Elsevier Science |
url |
http://hdl.handle.net/11336/169882 |
long_lat |
ENVELOPE(-60.783,-60.783,-62.467,-62.467) |
geographic |
Antarctic Southern Ocean Patagonia West Antarctica Argentino Argentina El Toqui |
geographic_facet |
Antarctic Southern Ocean Patagonia West Antarctica Argentino Argentina El Toqui |
genre |
Antarc* Antarctic Antarctica Ice Sheet Sea ice Southern Ocean West Antarctica |
genre_facet |
Antarc* Antarctic Antarctica Ice Sheet Sea ice Southern Ocean West Antarctica |
op_relation |
info:eu-repo/semantics/altIdentifier/url/https://www.cambridge.org/core/journals/quaternary-research/article/abs/early-deglaciation-and-paleolake-history-of-rio-cisnes-glacier-patagonian-ice-sheet-44s/3F8F57C5872C760113C6B907CA53643E info:eu-repo/semantics/altIdentifier/doi/10.1017/qua.2018.93 http://hdl.handle.net/11336/169882 García, Juan Luis; Maldonado, Antonio J.; de Porras, Maria Eugenia; Nuevo Delaunay, Amalia; Reyes, Omar; et al.; Extensive early deglaciation and paleolake history of the Río Cisnes Ice Lobe, Patagonian Ice Sheet 44°S; Academic Press Inc Elsevier Science; Quaternary Research; 91; 1; 1-2019; 194-217 0033-5894 CONICET Digital CONICET |
op_rights |
info:eu-repo/semantics/restrictedAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
op_doi |
https://doi.org/10.1017/qua.2018.93 |
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Quaternary Research |
container_volume |
91 |
container_issue |
1 |
container_start_page |
194 |
op_container_end_page |
217 |
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1779310251380572160 |