Early deglaciation and paleolake history of Rio Cisnes Glacier, Patagonian Ice Sheet (44 degrees 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 Rio Cisnes Glacier at 44 degrees S and also from the nearby Rio Nirehuao and Rio El Toqui val...
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ftubkoeln:oai:USBKOELN.ub.uni-koeln.de:16054 2023-05-15T13:36:41+02:00 Early deglaciation and paleolake history of Rio Cisnes Glacier, Patagonian Ice Sheet (44 degrees S) Garcia, Juan-Luis Maldonado, Antonio de Porras, Maria Eugenia Delaunay, Amalia Nuevo Reyes, Omar Ebensperger, Claudia A. Binnie, Steven A. Luethgens, Christopher Mendez, Cesar 2019 https://kups.ub.uni-koeln.de/16054/ eng eng CAMBRIDGE UNIV PRESS Garcia, Juan-Luis, Maldonado, Antonio, de Porras, Maria Eugenia, Delaunay, Amalia Nuevo, Reyes, Omar, Ebensperger, Claudia A., Binnie, Steven A., Luethgens, Christopher and Mendez, Cesar (2019). Early deglaciation and paleolake history of Rio Cisnes Glacier, Patagonian Ice Sheet (44 degrees S). Quat. Res., 91 (1). S. 194 - 218. NEW YORK: CAMBRIDGE UNIV PRESS. ISSN 1096-0287 ddc:no doc-type:article publishedVersion 2019 ftubkoeln 2022-11-09T07:15:26Z 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 Rio Cisnes Glacier at 44 degrees S and also from the nearby Rio Nirehuao and Rio El Toqui valleys (45 degrees S) in Chilean Patagonia. Our C-14, Be-10, and optically stimulated luminescence data indicate that after the last glacial maximum, Rio 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, Rio Cisnes Glacier extended only 40% of its full glacial extent. The deglaciation of Rio 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. Article in Journal/Newspaper Antarc* Antarctic Antarctica Ice Sheet Sea ice Southern Ocean West Antarctica Cologne University: KUPS Antarctic El Toqui ENVELOPE(-60.783,-60.783,-62.467,-62.467) Patagonia Southern Ocean West Antarctica |
institution |
Open Polar |
collection |
Cologne University: KUPS |
op_collection_id |
ftubkoeln |
language |
English |
topic |
ddc:no |
spellingShingle |
ddc:no Garcia, Juan-Luis Maldonado, Antonio de Porras, Maria Eugenia Delaunay, Amalia Nuevo Reyes, Omar Ebensperger, Claudia A. Binnie, Steven A. Luethgens, Christopher Mendez, Cesar Early deglaciation and paleolake history of Rio Cisnes Glacier, Patagonian Ice Sheet (44 degrees S) |
topic_facet |
ddc:no |
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 Rio Cisnes Glacier at 44 degrees S and also from the nearby Rio Nirehuao and Rio El Toqui valleys (45 degrees S) in Chilean Patagonia. Our C-14, Be-10, and optically stimulated luminescence data indicate that after the last glacial maximum, Rio 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, Rio Cisnes Glacier extended only 40% of its full glacial extent. The deglaciation of Rio 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. |
format |
Article in Journal/Newspaper |
author |
Garcia, Juan-Luis Maldonado, Antonio de Porras, Maria Eugenia Delaunay, Amalia Nuevo Reyes, Omar Ebensperger, Claudia A. Binnie, Steven A. Luethgens, Christopher Mendez, Cesar |
author_facet |
Garcia, Juan-Luis Maldonado, Antonio de Porras, Maria Eugenia Delaunay, Amalia Nuevo Reyes, Omar Ebensperger, Claudia A. Binnie, Steven A. Luethgens, Christopher Mendez, Cesar |
author_sort |
Garcia, Juan-Luis |
title |
Early deglaciation and paleolake history of Rio Cisnes Glacier, Patagonian Ice Sheet (44 degrees S) |
title_short |
Early deglaciation and paleolake history of Rio Cisnes Glacier, Patagonian Ice Sheet (44 degrees S) |
title_full |
Early deglaciation and paleolake history of Rio Cisnes Glacier, Patagonian Ice Sheet (44 degrees S) |
title_fullStr |
Early deglaciation and paleolake history of Rio Cisnes Glacier, Patagonian Ice Sheet (44 degrees S) |
title_full_unstemmed |
Early deglaciation and paleolake history of Rio Cisnes Glacier, Patagonian Ice Sheet (44 degrees S) |
title_sort |
early deglaciation and paleolake history of rio cisnes glacier, patagonian ice sheet (44 degrees s) |
publisher |
CAMBRIDGE UNIV PRESS |
publishDate |
2019 |
url |
https://kups.ub.uni-koeln.de/16054/ |
long_lat |
ENVELOPE(-60.783,-60.783,-62.467,-62.467) |
geographic |
Antarctic El Toqui Patagonia Southern Ocean West Antarctica |
geographic_facet |
Antarctic El Toqui Patagonia Southern Ocean West Antarctica |
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 |
Garcia, Juan-Luis, Maldonado, Antonio, de Porras, Maria Eugenia, Delaunay, Amalia Nuevo, Reyes, Omar, Ebensperger, Claudia A., Binnie, Steven A., Luethgens, Christopher and Mendez, Cesar (2019). Early deglaciation and paleolake history of Rio Cisnes Glacier, Patagonian Ice Sheet (44 degrees S). Quat. Res., 91 (1). S. 194 - 218. NEW YORK: CAMBRIDGE UNIV PRESS. ISSN 1096-0287 |
_version_ |
1766082394704576512 |