Exposure dating of Late Glacial and pre-LGM moraines in the Cordon de Doña Rosa, Northern/Central Chile (~31° S) ...
Despite the important role of the Central Andes (15–30° S) for climate reconstruction, knowledge about the Quaternary glaciation is very limited due to the scarcity of organic material for radiocarbon dating. We applied 10Be surface exposure dating (SED) on 22 boulders from moraines in the Cordon de...
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ftdatacite:10.3929/ethz-b-000554198 2024-04-28T08:00:36+00:00 Exposure dating of Late Glacial and pre-LGM moraines in the Cordon de Doña Rosa, Northern/Central Chile (~31° S) ... Zech, Roland Kull, Christoph Kubik, Peter W. Veit, Heinz 2007 application/pdf https://dx.doi.org/10.3929/ethz-b-000554198 http://hdl.handle.net/20.500.11850/554198 en eng ETH Zurich article-journal Text ScholarlyArticle Journal Article 2007 ftdatacite https://doi.org/10.3929/ethz-b-000554198 2024-04-02T12:32:08Z Despite the important role of the Central Andes (15–30° S) for climate reconstruction, knowledge about the Quaternary glaciation is very limited due to the scarcity of organic material for radiocarbon dating. We applied 10Be surface exposure dating (SED) on 22 boulders from moraines in the Cordon de Doña Rosa, Northern/Central Chile (~31° S). The results show that several glacial advances in the southern Central Andes occurred during the Late Glacial between ~14.7±1.5 and 11.6±1.2 ka. A much more extensive glaciation is dated to ~32±3 ka, predating the temperature minimum of the global LGM (Last Glacial Maximum: ~20 ka). Reviewing these results in the paleoclimatic context, we conclude that the Late Glacial advances were most likely caused by an intensification of the tropical circulation and a corresponding increase in summer precipitation. High-latitude temperatures minima, e.g. the Younger Dryas (YD) and the Antarctic Cold Reversal (ACR) may have triggered individual advances, but current systematic ... : Climate of the Past, 3 (1) ... Article in Journal/Newspaper Antarc* Antarctic DataCite Metadata Store (German National Library of Science and Technology) |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
English |
description |
Despite the important role of the Central Andes (15–30° S) for climate reconstruction, knowledge about the Quaternary glaciation is very limited due to the scarcity of organic material for radiocarbon dating. We applied 10Be surface exposure dating (SED) on 22 boulders from moraines in the Cordon de Doña Rosa, Northern/Central Chile (~31° S). The results show that several glacial advances in the southern Central Andes occurred during the Late Glacial between ~14.7±1.5 and 11.6±1.2 ka. A much more extensive glaciation is dated to ~32±3 ka, predating the temperature minimum of the global LGM (Last Glacial Maximum: ~20 ka). Reviewing these results in the paleoclimatic context, we conclude that the Late Glacial advances were most likely caused by an intensification of the tropical circulation and a corresponding increase in summer precipitation. High-latitude temperatures minima, e.g. the Younger Dryas (YD) and the Antarctic Cold Reversal (ACR) may have triggered individual advances, but current systematic ... : Climate of the Past, 3 (1) ... |
format |
Article in Journal/Newspaper |
author |
Zech, Roland Kull, Christoph Kubik, Peter W. Veit, Heinz |
spellingShingle |
Zech, Roland Kull, Christoph Kubik, Peter W. Veit, Heinz Exposure dating of Late Glacial and pre-LGM moraines in the Cordon de Doña Rosa, Northern/Central Chile (~31° S) ... |
author_facet |
Zech, Roland Kull, Christoph Kubik, Peter W. Veit, Heinz |
author_sort |
Zech, Roland |
title |
Exposure dating of Late Glacial and pre-LGM moraines in the Cordon de Doña Rosa, Northern/Central Chile (~31° S) ... |
title_short |
Exposure dating of Late Glacial and pre-LGM moraines in the Cordon de Doña Rosa, Northern/Central Chile (~31° S) ... |
title_full |
Exposure dating of Late Glacial and pre-LGM moraines in the Cordon de Doña Rosa, Northern/Central Chile (~31° S) ... |
title_fullStr |
Exposure dating of Late Glacial and pre-LGM moraines in the Cordon de Doña Rosa, Northern/Central Chile (~31° S) ... |
title_full_unstemmed |
Exposure dating of Late Glacial and pre-LGM moraines in the Cordon de Doña Rosa, Northern/Central Chile (~31° S) ... |
title_sort |
exposure dating of late glacial and pre-lgm moraines in the cordon de doña rosa, northern/central chile (~31° s) ... |
publisher |
ETH Zurich |
publishDate |
2007 |
url |
https://dx.doi.org/10.3929/ethz-b-000554198 http://hdl.handle.net/20.500.11850/554198 |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_doi |
https://doi.org/10.3929/ethz-b-000554198 |
_version_ |
1797572746638524416 |