West Antarctic Ice Sheet retreat driven by Holocene warm water incursions
Glaciological and oceanographic observations coupled with numerical models show that warm Circumpolar Deep Water (CDW) upwelling onto the West Antarctic continental shelf causes melting of the undersides of floating ice shelves. Because these ice shelves buttress glaciers feeding into them, their oc...
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ftpubmed:oai:pubmedcentral.nih.gov:5510715 2023-05-15T13:24:02+02:00 West Antarctic Ice Sheet retreat driven by Holocene warm water incursions Hillenbrand, Claus-Dieter Smith, James A. Hodell, David A. Greaves, Mervyn Poole, Christopher R. Kender, Sev Williams, Mark Andersen, Thorbjørn Joest Jernas, Patrycja E. Elderfield, Henry Klages, Johann P. Roberts, Stephen J. Gohl, Karsten Larter, Robert D. Kuhn, Gerhard 2017-07-05 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5510715/ http://www.ncbi.nlm.nih.gov/pubmed/28682333 https://doi.org/10.1038/nature22995 en eng http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5510715/ http://www.ncbi.nlm.nih.gov/pubmed/28682333 http://dx.doi.org/10.1038/nature22995 Users may view, print, copy, and download text and data-mine the content in such documents, for the purposes of academic research, subject always to the full Conditions of use:http://www.nature.com/authors/editorial_policies/license.html#terms Article Text 2017 ftpubmed https://doi.org/10.1038/nature22995 2018-01-07T01:18:59Z Glaciological and oceanographic observations coupled with numerical models show that warm Circumpolar Deep Water (CDW) upwelling onto the West Antarctic continental shelf causes melting of the undersides of floating ice shelves. Because these ice shelves buttress glaciers feeding into them, their ocean-induced thinning is driving Antarctic ice-sheet loss today. Here we present the first multi-proxy data based reconstruction of variability in CDW inflow to the Amundsen Sea sector, the most vulnerable part of the West Antarctic Ice Sheet, during the last 11,000 years. The chemical composition of foraminifer shells and benthic foraminifer assemblages in marine sediments indicate that enhanced CDW upwelling, controlled by the latitudinal position of the Southern Hemisphere westerly winds, forced deglaciation of this sector both until 7,500 years ago, when an ice-shelf collapse may have caused rapid ice-sheet thinning further upstream, and since the 1940s. These results increase confidence in the predictive capability of current ice-sheet models. Text Amundsen Sea Antarc* Antarctic Ice Sheet Ice Shelf Ice Shelves PubMed Central (PMC) Amundsen Sea Antarctic Buttress ENVELOPE(-57.083,-57.083,-63.550,-63.550) West Antarctic Ice Sheet Nature 547 7661 43 48 |
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English |
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Article Hillenbrand, Claus-Dieter Smith, James A. Hodell, David A. Greaves, Mervyn Poole, Christopher R. Kender, Sev Williams, Mark Andersen, Thorbjørn Joest Jernas, Patrycja E. Elderfield, Henry Klages, Johann P. Roberts, Stephen J. Gohl, Karsten Larter, Robert D. Kuhn, Gerhard West Antarctic Ice Sheet retreat driven by Holocene warm water incursions |
topic_facet |
Article |
description |
Glaciological and oceanographic observations coupled with numerical models show that warm Circumpolar Deep Water (CDW) upwelling onto the West Antarctic continental shelf causes melting of the undersides of floating ice shelves. Because these ice shelves buttress glaciers feeding into them, their ocean-induced thinning is driving Antarctic ice-sheet loss today. Here we present the first multi-proxy data based reconstruction of variability in CDW inflow to the Amundsen Sea sector, the most vulnerable part of the West Antarctic Ice Sheet, during the last 11,000 years. The chemical composition of foraminifer shells and benthic foraminifer assemblages in marine sediments indicate that enhanced CDW upwelling, controlled by the latitudinal position of the Southern Hemisphere westerly winds, forced deglaciation of this sector both until 7,500 years ago, when an ice-shelf collapse may have caused rapid ice-sheet thinning further upstream, and since the 1940s. These results increase confidence in the predictive capability of current ice-sheet models. |
format |
Text |
author |
Hillenbrand, Claus-Dieter Smith, James A. Hodell, David A. Greaves, Mervyn Poole, Christopher R. Kender, Sev Williams, Mark Andersen, Thorbjørn Joest Jernas, Patrycja E. Elderfield, Henry Klages, Johann P. Roberts, Stephen J. Gohl, Karsten Larter, Robert D. Kuhn, Gerhard |
author_facet |
Hillenbrand, Claus-Dieter Smith, James A. Hodell, David A. Greaves, Mervyn Poole, Christopher R. Kender, Sev Williams, Mark Andersen, Thorbjørn Joest Jernas, Patrycja E. Elderfield, Henry Klages, Johann P. Roberts, Stephen J. Gohl, Karsten Larter, Robert D. Kuhn, Gerhard |
author_sort |
Hillenbrand, Claus-Dieter |
title |
West Antarctic Ice Sheet retreat driven by Holocene warm water incursions |
title_short |
West Antarctic Ice Sheet retreat driven by Holocene warm water incursions |
title_full |
West Antarctic Ice Sheet retreat driven by Holocene warm water incursions |
title_fullStr |
West Antarctic Ice Sheet retreat driven by Holocene warm water incursions |
title_full_unstemmed |
West Antarctic Ice Sheet retreat driven by Holocene warm water incursions |
title_sort |
west antarctic ice sheet retreat driven by holocene warm water incursions |
publishDate |
2017 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5510715/ http://www.ncbi.nlm.nih.gov/pubmed/28682333 https://doi.org/10.1038/nature22995 |
long_lat |
ENVELOPE(-57.083,-57.083,-63.550,-63.550) |
geographic |
Amundsen Sea Antarctic Buttress West Antarctic Ice Sheet |
geographic_facet |
Amundsen Sea Antarctic Buttress West Antarctic Ice Sheet |
genre |
Amundsen Sea Antarc* Antarctic Ice Sheet Ice Shelf Ice Shelves |
genre_facet |
Amundsen Sea Antarc* Antarctic Ice Sheet Ice Shelf Ice Shelves |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5510715/ http://www.ncbi.nlm.nih.gov/pubmed/28682333 http://dx.doi.org/10.1038/nature22995 |
op_rights |
Users may view, print, copy, and download text and data-mine the content in such documents, for the purposes of academic research, subject always to the full Conditions of use:http://www.nature.com/authors/editorial_policies/license.html#terms |
op_doi |
https://doi.org/10.1038/nature22995 |
container_title |
Nature |
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547 |
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7661 |
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43 |
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48 |
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1766377014550331392 |