Rapid glacier recession at Monte San Lorenzo (Patagonia) in response to abrupt Southern Hemisphere warming 13.0–12.0 ka BP
Abstract Mid‐latitude Patagonian glaciers are sensitive to changes in the complex coupled ocean–atmospheric climate system of the Southern Hemisphere. Here, we investigate glacier response to a period of rapid climate warming immediately post‐dating the Antarctic Cold Reversal (ACR). We analyse a se...
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Online Access: | http://dx.doi.org/10.1002/jqs.3463 https://onlinelibrary.wiley.com/doi/pdf/10.1002/jqs.3463 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/jqs.3463 |
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crwiley:10.1002/jqs.3463 2024-06-02T07:57:38+00:00 Rapid glacier recession at Monte San Lorenzo (Patagonia) in response to abrupt Southern Hemisphere warming 13.0–12.0 ka BP Martin, Julian R. V. Thorndycraft, Varyl R. Davies, Bethan J. Rodés, Ángel Natural Environment Research Council Quaternary Research Association 2022 http://dx.doi.org/10.1002/jqs.3463 https://onlinelibrary.wiley.com/doi/pdf/10.1002/jqs.3463 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/jqs.3463 en eng Wiley http://creativecommons.org/licenses/by/4.0/ Journal of Quaternary Science volume 38, issue 2, page 160-173 ISSN 0267-8179 1099-1417 journal-article 2022 crwiley https://doi.org/10.1002/jqs.3463 2024-05-03T10:48:31Z Abstract Mid‐latitude Patagonian glaciers are sensitive to changes in the complex coupled ocean–atmospheric climate system of the Southern Hemisphere. Here, we investigate glacier response to a period of rapid climate warming immediately post‐dating the Antarctic Cold Reversal (ACR). We analyse a sequence of 13 ice margins, four of them dated, from an outlet valley of the Monte San Lorenzo ice cap (47.3°S). We constrain glacier recession of 31.7 km over a period of ~1 kyr from 13.2 ± 0.4 to 12.1 ± 0.4 ka. The average rate of recession was 35.2 m a −1 over this 1‐kyr period, increasing from 12.75 m a −1 at the start of the record (moraines M1 to M4) to 50 m a −1 from M9 to M12. This recession occurred during a period of rapid warming when the austral westerlies shifted polewards. It is likely that ice extent stabilized during the Holocene, with ice occupying the M13 moraine during repeated Holocene neoglacials, before anthropogenic warming caused recession at a rate of 55.5 m a −1 from 1985 to 2016. We conclude that 20th century rates of recession were higher than those during post‐ACR warming, though of a similar order of magnitude. Article in Journal/Newspaper Antarc* Antarctic Ice cap Wiley Online Library Antarctic Austral Patagonia The Antarctic Journal of Quaternary Science 38 2 160 173 |
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Wiley Online Library |
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English |
description |
Abstract Mid‐latitude Patagonian glaciers are sensitive to changes in the complex coupled ocean–atmospheric climate system of the Southern Hemisphere. Here, we investigate glacier response to a period of rapid climate warming immediately post‐dating the Antarctic Cold Reversal (ACR). We analyse a sequence of 13 ice margins, four of them dated, from an outlet valley of the Monte San Lorenzo ice cap (47.3°S). We constrain glacier recession of 31.7 km over a period of ~1 kyr from 13.2 ± 0.4 to 12.1 ± 0.4 ka. The average rate of recession was 35.2 m a −1 over this 1‐kyr period, increasing from 12.75 m a −1 at the start of the record (moraines M1 to M4) to 50 m a −1 from M9 to M12. This recession occurred during a period of rapid warming when the austral westerlies shifted polewards. It is likely that ice extent stabilized during the Holocene, with ice occupying the M13 moraine during repeated Holocene neoglacials, before anthropogenic warming caused recession at a rate of 55.5 m a −1 from 1985 to 2016. We conclude that 20th century rates of recession were higher than those during post‐ACR warming, though of a similar order of magnitude. |
author2 |
Natural Environment Research Council Quaternary Research Association |
format |
Article in Journal/Newspaper |
author |
Martin, Julian R. V. Thorndycraft, Varyl R. Davies, Bethan J. Rodés, Ángel |
spellingShingle |
Martin, Julian R. V. Thorndycraft, Varyl R. Davies, Bethan J. Rodés, Ángel Rapid glacier recession at Monte San Lorenzo (Patagonia) in response to abrupt Southern Hemisphere warming 13.0–12.0 ka BP |
author_facet |
Martin, Julian R. V. Thorndycraft, Varyl R. Davies, Bethan J. Rodés, Ángel |
author_sort |
Martin, Julian R. V. |
title |
Rapid glacier recession at Monte San Lorenzo (Patagonia) in response to abrupt Southern Hemisphere warming 13.0–12.0 ka BP |
title_short |
Rapid glacier recession at Monte San Lorenzo (Patagonia) in response to abrupt Southern Hemisphere warming 13.0–12.0 ka BP |
title_full |
Rapid glacier recession at Monte San Lorenzo (Patagonia) in response to abrupt Southern Hemisphere warming 13.0–12.0 ka BP |
title_fullStr |
Rapid glacier recession at Monte San Lorenzo (Patagonia) in response to abrupt Southern Hemisphere warming 13.0–12.0 ka BP |
title_full_unstemmed |
Rapid glacier recession at Monte San Lorenzo (Patagonia) in response to abrupt Southern Hemisphere warming 13.0–12.0 ka BP |
title_sort |
rapid glacier recession at monte san lorenzo (patagonia) in response to abrupt southern hemisphere warming 13.0–12.0 ka bp |
publisher |
Wiley |
publishDate |
2022 |
url |
http://dx.doi.org/10.1002/jqs.3463 https://onlinelibrary.wiley.com/doi/pdf/10.1002/jqs.3463 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/jqs.3463 |
geographic |
Antarctic Austral Patagonia The Antarctic |
geographic_facet |
Antarctic Austral Patagonia The Antarctic |
genre |
Antarc* Antarctic Ice cap |
genre_facet |
Antarc* Antarctic Ice cap |
op_source |
Journal of Quaternary Science volume 38, issue 2, page 160-173 ISSN 0267-8179 1099-1417 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1002/jqs.3463 |
container_title |
Journal of Quaternary Science |
container_volume |
38 |
container_issue |
2 |
container_start_page |
160 |
op_container_end_page |
173 |
_version_ |
1800740819173376000 |