Glacial sediment-landform associations and palaeoclimate during the last glaciation, Strait of Magellan, Chile
Glacial sediments and landforms preserved beside the Strait of Magellan record repeated advances of an outlet of the Patagonian Icefield during and following the last glacial maximum (LGM; similar to 25,000-14,000 C-14 yr B.P,). Ice-marginal landform assemblages consist of thrust moraine complexes,...
Published in: | Quaternary Research |
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Online Access: | https://research-portal.st-andrews.ac.uk/en/researchoutput/glacial-sedimentlandform-associations-and-palaeoclimate-during-the-last-glaciation-strait-of-magellan-chile(b7d2f461-710e-49d0-94b7-c3e55ac38c8d).html https://doi.org/10.1006/qres.2000.2140 http://www.scopus.com/inward/record.url?scp=0033885751&partnerID=8YFLogxK |
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ftunstandrewcris:oai:research-portal.st-andrews.ac.uk:publications/b7d2f461-710e-49d0-94b7-c3e55ac38c8d 2024-06-23T07:50:33+00:00 Glacial sediment-landform associations and palaeoclimate during the last glaciation, Strait of Magellan, Chile Benn, Douglas Iain Clapperton, CM 2000-07 https://research-portal.st-andrews.ac.uk/en/researchoutput/glacial-sedimentlandform-associations-and-palaeoclimate-during-the-last-glaciation-strait-of-magellan-chile(b7d2f461-710e-49d0-94b7-c3e55ac38c8d).html https://doi.org/10.1006/qres.2000.2140 http://www.scopus.com/inward/record.url?scp=0033885751&partnerID=8YFLogxK eng eng https://research-portal.st-andrews.ac.uk/en/researchoutput/glacial-sedimentlandform-associations-and-palaeoclimate-during-the-last-glaciation-strait-of-magellan-chile(b7d2f461-710e-49d0-94b7-c3e55ac38c8d).html info:eu-repo/semantics/restrictedAccess Benn , D I & Clapperton , CM 2000 , ' Glacial sediment-landform associations and palaeoclimate during the last glaciation, Strait of Magellan, Chile ' , Quaternary Research , vol. 54 , pp. 13-23 . https://doi.org/10.1006/qres.2000.2140 South America Chile paleoclimate glacier reconstruction last glacial maximum LATE PLEISTOCENE ARCTIC CANADA ICE SHELF PATAGONIA CLIMATE POLLEN BEETLE DEFORMATION VEGETATION EXAMPLES article 2000 ftunstandrewcris https://doi.org/10.1006/qres.2000.2140 2024-06-13T00:03:34Z Glacial sediments and landforms preserved beside the Strait of Magellan record repeated advances of an outlet of the Patagonian Icefield during and following the last glacial maximum (LGM; similar to 25,000-14,000 C-14 yr B.P,). Ice-marginal landform assemblages consist of thrust moraine complexes, kame and kettle topography, and lateral meltwater channels, very similar to those found at the margins of modern subpolar glaciers. Taken together with other forms of paleoenvironmental evidence, the landform assemblages show that, during the LGM and late-glacial time, permafrost occurred near sea lever in southernmost South America. This finding implies that mean annual temperatures were similar to 7-8 degrees C lower than at present, somewhat lower than those reconstructed by current glacier-climatic models. Comparison,vith precipitation-temperature relationships for modern glaciers suggests, in addition, that precipitation levels were lower than today. Reduced glacial-age precipitation may have resulted from a precipitation shadow induced by the Patagonian Icefield, an equatorward migration of the average position of westerly cyclonic storm tracks in the southern midlatitudes, or both these factors. (C) 2000 University of Washington. Article in Journal/Newspaper Arctic glacier* Ice Ice Shelf permafrost University of St Andrews: Research Portal Arctic Canada Lever ENVELOPE(-63.608,-63.608,-65.506,-65.506) Patagonia Quaternary Research 54 1 13 23 |
institution |
Open Polar |
collection |
University of St Andrews: Research Portal |
op_collection_id |
ftunstandrewcris |
language |
English |
topic |
South America Chile paleoclimate glacier reconstruction last glacial maximum LATE PLEISTOCENE ARCTIC CANADA ICE SHELF PATAGONIA CLIMATE POLLEN BEETLE DEFORMATION VEGETATION EXAMPLES |
spellingShingle |
South America Chile paleoclimate glacier reconstruction last glacial maximum LATE PLEISTOCENE ARCTIC CANADA ICE SHELF PATAGONIA CLIMATE POLLEN BEETLE DEFORMATION VEGETATION EXAMPLES Benn, Douglas Iain Clapperton, CM Glacial sediment-landform associations and palaeoclimate during the last glaciation, Strait of Magellan, Chile |
topic_facet |
South America Chile paleoclimate glacier reconstruction last glacial maximum LATE PLEISTOCENE ARCTIC CANADA ICE SHELF PATAGONIA CLIMATE POLLEN BEETLE DEFORMATION VEGETATION EXAMPLES |
description |
Glacial sediments and landforms preserved beside the Strait of Magellan record repeated advances of an outlet of the Patagonian Icefield during and following the last glacial maximum (LGM; similar to 25,000-14,000 C-14 yr B.P,). Ice-marginal landform assemblages consist of thrust moraine complexes, kame and kettle topography, and lateral meltwater channels, very similar to those found at the margins of modern subpolar glaciers. Taken together with other forms of paleoenvironmental evidence, the landform assemblages show that, during the LGM and late-glacial time, permafrost occurred near sea lever in southernmost South America. This finding implies that mean annual temperatures were similar to 7-8 degrees C lower than at present, somewhat lower than those reconstructed by current glacier-climatic models. Comparison,vith precipitation-temperature relationships for modern glaciers suggests, in addition, that precipitation levels were lower than today. Reduced glacial-age precipitation may have resulted from a precipitation shadow induced by the Patagonian Icefield, an equatorward migration of the average position of westerly cyclonic storm tracks in the southern midlatitudes, or both these factors. (C) 2000 University of Washington. |
format |
Article in Journal/Newspaper |
author |
Benn, Douglas Iain Clapperton, CM |
author_facet |
Benn, Douglas Iain Clapperton, CM |
author_sort |
Benn, Douglas Iain |
title |
Glacial sediment-landform associations and palaeoclimate during the last glaciation, Strait of Magellan, Chile |
title_short |
Glacial sediment-landform associations and palaeoclimate during the last glaciation, Strait of Magellan, Chile |
title_full |
Glacial sediment-landform associations and palaeoclimate during the last glaciation, Strait of Magellan, Chile |
title_fullStr |
Glacial sediment-landform associations and palaeoclimate during the last glaciation, Strait of Magellan, Chile |
title_full_unstemmed |
Glacial sediment-landform associations and palaeoclimate during the last glaciation, Strait of Magellan, Chile |
title_sort |
glacial sediment-landform associations and palaeoclimate during the last glaciation, strait of magellan, chile |
publishDate |
2000 |
url |
https://research-portal.st-andrews.ac.uk/en/researchoutput/glacial-sedimentlandform-associations-and-palaeoclimate-during-the-last-glaciation-strait-of-magellan-chile(b7d2f461-710e-49d0-94b7-c3e55ac38c8d).html https://doi.org/10.1006/qres.2000.2140 http://www.scopus.com/inward/record.url?scp=0033885751&partnerID=8YFLogxK |
long_lat |
ENVELOPE(-63.608,-63.608,-65.506,-65.506) |
geographic |
Arctic Canada Lever Patagonia |
geographic_facet |
Arctic Canada Lever Patagonia |
genre |
Arctic glacier* Ice Ice Shelf permafrost |
genre_facet |
Arctic glacier* Ice Ice Shelf permafrost |
op_source |
Benn , D I & Clapperton , CM 2000 , ' Glacial sediment-landform associations and palaeoclimate during the last glaciation, Strait of Magellan, Chile ' , Quaternary Research , vol. 54 , pp. 13-23 . https://doi.org/10.1006/qres.2000.2140 |
op_relation |
https://research-portal.st-andrews.ac.uk/en/researchoutput/glacial-sedimentlandform-associations-and-palaeoclimate-during-the-last-glaciation-strait-of-magellan-chile(b7d2f461-710e-49d0-94b7-c3e55ac38c8d).html |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1006/qres.2000.2140 |
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54 |
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