Holocene glacier history of northeastern Cordillera Darwin, southernmost South America (55°S)
Abstract In the Cordillera Darwin, southernmost South America, we used 10 Be and 14 C dating, dendrochronology, and historical observations to reconstruct the glacial history of the Dalla Vedova valley from deglacial time to the present. After deglacial recession into northeastern Darwin and Dalla V...
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crcambridgeupr:10.1017/qua.2021.45 2024-05-12T07:56:25+00:00 Holocene glacier history of northeastern Cordillera Darwin, southernmost South America (55°S) Reynhout, Scott A. Kaplan, Michael R. Sagredo, Esteban A. Aravena, Juan Carlos Soteres, Rodrigo L. Schwartz, Roseanne Schaefer, Joerg M. 2021 http://dx.doi.org/10.1017/qua.2021.45 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0033589421000454 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Quaternary Research volume 105, page 166-181 ISSN 0033-5894 1096-0287 General Earth and Planetary Sciences Earth-Surface Processes Arts and Humanities (miscellaneous) journal-article 2021 crcambridgeupr https://doi.org/10.1017/qua.2021.45 2024-04-18T06:54:42Z Abstract In the Cordillera Darwin, southernmost South America, we used 10 Be and 14 C dating, dendrochronology, and historical observations to reconstruct the glacial history of the Dalla Vedova valley from deglacial time to the present. After deglacial recession into northeastern Darwin and Dalla Vedova, by ~16 ka, evidence indicates a glacial advance at ~13 ka coeval with the Antarctic Cold Reversal. The next robustly dated glacial expansion occurred at 870 ± 60 calendar yr ago (approximately AD 1150), followed by less-extensive dendrochronologically constrained advances from shortly before AD 1836 to the mid-twentieth century. Our record is consistent with most studies within the Cordillera Darwin that show that the Holocene glacial maximum occurred during the last millennium. This pattern contrasts with the extensive early- and mid-Holocene glacier expansions farther north in Patagonia; furthermore, an advance at 870 ± 60 yr ago may suggest out-of-phase glacial advances occurred within the Cordillera Darwin relative to Patagonia. We speculate that a southward shift of westerlies and associated climate regimes toward the southernmost tip of the continent, about 900–800 yr ago, provides a mechanism by which some glaciers advanced in the Cordillera Darwin during what is generally considered a warm and dry period to the north in Patagonia. Article in Journal/Newspaper Antarc* Antarctic Cambridge University Press Antarctic Patagonia The Antarctic Quaternary Research 1 16 |
institution |
Open Polar |
collection |
Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
topic |
General Earth and Planetary Sciences Earth-Surface Processes Arts and Humanities (miscellaneous) |
spellingShingle |
General Earth and Planetary Sciences Earth-Surface Processes Arts and Humanities (miscellaneous) Reynhout, Scott A. Kaplan, Michael R. Sagredo, Esteban A. Aravena, Juan Carlos Soteres, Rodrigo L. Schwartz, Roseanne Schaefer, Joerg M. Holocene glacier history of northeastern Cordillera Darwin, southernmost South America (55°S) |
topic_facet |
General Earth and Planetary Sciences Earth-Surface Processes Arts and Humanities (miscellaneous) |
description |
Abstract In the Cordillera Darwin, southernmost South America, we used 10 Be and 14 C dating, dendrochronology, and historical observations to reconstruct the glacial history of the Dalla Vedova valley from deglacial time to the present. After deglacial recession into northeastern Darwin and Dalla Vedova, by ~16 ka, evidence indicates a glacial advance at ~13 ka coeval with the Antarctic Cold Reversal. The next robustly dated glacial expansion occurred at 870 ± 60 calendar yr ago (approximately AD 1150), followed by less-extensive dendrochronologically constrained advances from shortly before AD 1836 to the mid-twentieth century. Our record is consistent with most studies within the Cordillera Darwin that show that the Holocene glacial maximum occurred during the last millennium. This pattern contrasts with the extensive early- and mid-Holocene glacier expansions farther north in Patagonia; furthermore, an advance at 870 ± 60 yr ago may suggest out-of-phase glacial advances occurred within the Cordillera Darwin relative to Patagonia. We speculate that a southward shift of westerlies and associated climate regimes toward the southernmost tip of the continent, about 900–800 yr ago, provides a mechanism by which some glaciers advanced in the Cordillera Darwin during what is generally considered a warm and dry period to the north in Patagonia. |
format |
Article in Journal/Newspaper |
author |
Reynhout, Scott A. Kaplan, Michael R. Sagredo, Esteban A. Aravena, Juan Carlos Soteres, Rodrigo L. Schwartz, Roseanne Schaefer, Joerg M. |
author_facet |
Reynhout, Scott A. Kaplan, Michael R. Sagredo, Esteban A. Aravena, Juan Carlos Soteres, Rodrigo L. Schwartz, Roseanne Schaefer, Joerg M. |
author_sort |
Reynhout, Scott A. |
title |
Holocene glacier history of northeastern Cordillera Darwin, southernmost South America (55°S) |
title_short |
Holocene glacier history of northeastern Cordillera Darwin, southernmost South America (55°S) |
title_full |
Holocene glacier history of northeastern Cordillera Darwin, southernmost South America (55°S) |
title_fullStr |
Holocene glacier history of northeastern Cordillera Darwin, southernmost South America (55°S) |
title_full_unstemmed |
Holocene glacier history of northeastern Cordillera Darwin, southernmost South America (55°S) |
title_sort |
holocene glacier history of northeastern cordillera darwin, southernmost south america (55°s) |
publisher |
Cambridge University Press (CUP) |
publishDate |
2021 |
url |
http://dx.doi.org/10.1017/qua.2021.45 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0033589421000454 |
geographic |
Antarctic Patagonia The Antarctic |
geographic_facet |
Antarctic Patagonia The Antarctic |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_source |
Quaternary Research volume 105, page 166-181 ISSN 0033-5894 1096-0287 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/qua.2021.45 |
container_title |
Quaternary Research |
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1 |
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16 |
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1798836474252099584 |