Mid-Holocene pulse of thinning in the Weddell Sea sector of the West Antarctic ice sheet
Establishing the trajectory of thinning of the West Antarctic ice sheet (WAIS) since the last glacial maximum (LGM) is important for addressing questions concerning ice sheet (in)stability and changes in global sea level. Here we present detailed geomorphological and cosmogenic nuclide data from the...
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ftpubmed:oai:pubmedcentral.nih.gov:4996935 2023-05-15T13:56:16+02:00 Mid-Holocene pulse of thinning in the Weddell Sea sector of the West Antarctic ice sheet Hein, Andrew S. Marrero, Shasta M. Woodward, John Dunning, Stuart A. Winter, Kate Westoby, Matthew J. Freeman, Stewart P. H. T. Shanks, Richard P. Sugden, David E. 2016-08-22 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4996935/ http://www.ncbi.nlm.nih.gov/pubmed/27545202 https://doi.org/10.1038/ncomms12511 en eng Nature Publishing Group http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4996935/ http://www.ncbi.nlm.nih.gov/pubmed/27545202 http://dx.doi.org/10.1038/ncomms12511 Copyright © 2016, The Author(s) http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article's Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ CC-BY Article Text 2016 ftpubmed https://doi.org/10.1038/ncomms12511 2016-09-11T00:07:05Z Establishing the trajectory of thinning of the West Antarctic ice sheet (WAIS) since the last glacial maximum (LGM) is important for addressing questions concerning ice sheet (in)stability and changes in global sea level. Here we present detailed geomorphological and cosmogenic nuclide data from the southern Ellsworth Mountains in the heart of the Weddell Sea embayment that suggest the ice sheet, nourished by increased snowfall until the early Holocene, was close to its LGM thickness at 10 ka. A pulse of rapid thinning caused the ice elevation to fall ∼400 m to the present level at 6.5–3.5 ka, and could have contributed 1.4–2 m to global sea-level rise. These results imply that the Weddell Sea sector of the WAIS contributed little to late-glacial pulses in sea-level rise but was involved in mid-Holocene rises. The stepped decline is argued to reflect marine downdraw triggered by grounding line retreat into Hercules Inlet. Text Antarc* Antarctic Ice Sheet Weddell Sea PubMed Central (PMC) Antarctic Ellsworth Mountains ENVELOPE(-85.000,-85.000,-78.750,-78.750) Hercules ENVELOPE(161.450,161.450,-77.483,-77.483) Hercules Inlet ENVELOPE(-79.000,-79.000,-80.066,-80.066) Weddell Weddell Sea West Antarctic Ice Sheet Nature Communications 7 1 |
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Article Hein, Andrew S. Marrero, Shasta M. Woodward, John Dunning, Stuart A. Winter, Kate Westoby, Matthew J. Freeman, Stewart P. H. T. Shanks, Richard P. Sugden, David E. Mid-Holocene pulse of thinning in the Weddell Sea sector of the West Antarctic ice sheet |
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description |
Establishing the trajectory of thinning of the West Antarctic ice sheet (WAIS) since the last glacial maximum (LGM) is important for addressing questions concerning ice sheet (in)stability and changes in global sea level. Here we present detailed geomorphological and cosmogenic nuclide data from the southern Ellsworth Mountains in the heart of the Weddell Sea embayment that suggest the ice sheet, nourished by increased snowfall until the early Holocene, was close to its LGM thickness at 10 ka. A pulse of rapid thinning caused the ice elevation to fall ∼400 m to the present level at 6.5–3.5 ka, and could have contributed 1.4–2 m to global sea-level rise. These results imply that the Weddell Sea sector of the WAIS contributed little to late-glacial pulses in sea-level rise but was involved in mid-Holocene rises. The stepped decline is argued to reflect marine downdraw triggered by grounding line retreat into Hercules Inlet. |
format |
Text |
author |
Hein, Andrew S. Marrero, Shasta M. Woodward, John Dunning, Stuart A. Winter, Kate Westoby, Matthew J. Freeman, Stewart P. H. T. Shanks, Richard P. Sugden, David E. |
author_facet |
Hein, Andrew S. Marrero, Shasta M. Woodward, John Dunning, Stuart A. Winter, Kate Westoby, Matthew J. Freeman, Stewart P. H. T. Shanks, Richard P. Sugden, David E. |
author_sort |
Hein, Andrew S. |
title |
Mid-Holocene pulse of thinning in the Weddell Sea sector of the West Antarctic ice sheet |
title_short |
Mid-Holocene pulse of thinning in the Weddell Sea sector of the West Antarctic ice sheet |
title_full |
Mid-Holocene pulse of thinning in the Weddell Sea sector of the West Antarctic ice sheet |
title_fullStr |
Mid-Holocene pulse of thinning in the Weddell Sea sector of the West Antarctic ice sheet |
title_full_unstemmed |
Mid-Holocene pulse of thinning in the Weddell Sea sector of the West Antarctic ice sheet |
title_sort |
mid-holocene pulse of thinning in the weddell sea sector of the west antarctic ice sheet |
publisher |
Nature Publishing Group |
publishDate |
2016 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4996935/ http://www.ncbi.nlm.nih.gov/pubmed/27545202 https://doi.org/10.1038/ncomms12511 |
long_lat |
ENVELOPE(-85.000,-85.000,-78.750,-78.750) ENVELOPE(161.450,161.450,-77.483,-77.483) ENVELOPE(-79.000,-79.000,-80.066,-80.066) |
geographic |
Antarctic Ellsworth Mountains Hercules Hercules Inlet Weddell Weddell Sea West Antarctic Ice Sheet |
geographic_facet |
Antarctic Ellsworth Mountains Hercules Hercules Inlet Weddell Weddell Sea West Antarctic Ice Sheet |
genre |
Antarc* Antarctic Ice Sheet Weddell Sea |
genre_facet |
Antarc* Antarctic Ice Sheet Weddell Sea |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4996935/ http://www.ncbi.nlm.nih.gov/pubmed/27545202 http://dx.doi.org/10.1038/ncomms12511 |
op_rights |
Copyright © 2016, The Author(s) http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article's Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1038/ncomms12511 |
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Nature Communications |
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