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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ftunivcardiff:oai:https://orca.cardiff.ac.uk:129047 2023-06-11T04:04:33+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 application/pdf https://orca.cardiff.ac.uk/id/eprint/129047/ https://doi.org/10.1038/ncomms12511 https://orca.cardiff.ac.uk/id/eprint/129047/1/ncomms12511.pdf en eng Nature Research https://orca.cardiff.ac.uk/id/eprint/129047/1/ncomms12511.pdf Hein, Andrew S., Marrero, Shasta M. https://orca.cardiff.ac.uk/view/cardiffauthors/A2529897K.html orcid:0000-0003-2917-0292 orcid:0000-0003-2917-0292, Woodward, John, Dunning, Stuart A., Winter, Kate, Westoby, Matthew J., Freeman, Stewart P. H. T., Shanks, Richard P. and Sugden, David E. 2016. Mid-Holocene pulse of thinning in the Weddell Sea sector of the West Antarctic ice sheet. Nature Communications 7 (1) , 12511. 10.1038/ncomms12511 https://doi.org/10.1038/ncomms12511 file https://orca.cardiff.ac.uk/id/eprint/129047/1/ncomms12511.pdf doi:10.1038/ncomms12511 cc_by Article PeerReviewed 2016 ftunivcardiff https://doi.org/10.1038/ncomms12511 2023-05-04T22:36:16Z 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 Article in Journal/Newspaper Antarc* Antarctic Ice Sheet Weddell Sea Cardiff University: ORCA (Online Research @ Cardiff) Antarctic Weddell Sea West Antarctic Ice Sheet Weddell 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) Nature Communications 7 1 |
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Open Polar |
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Cardiff University: ORCA (Online Research @ Cardiff) |
op_collection_id |
ftunivcardiff |
language |
English |
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 |
Article in Journal/Newspaper |
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. |
spellingShingle |
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 |
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 Research |
publishDate |
2016 |
url |
https://orca.cardiff.ac.uk/id/eprint/129047/ https://doi.org/10.1038/ncomms12511 https://orca.cardiff.ac.uk/id/eprint/129047/1/ncomms12511.pdf |
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 Weddell Sea West Antarctic Ice Sheet Weddell Ellsworth Mountains Hercules Hercules Inlet |
geographic_facet |
Antarctic Weddell Sea West Antarctic Ice Sheet Weddell Ellsworth Mountains Hercules Hercules Inlet |
genre |
Antarc* Antarctic Ice Sheet Weddell Sea |
genre_facet |
Antarc* Antarctic Ice Sheet Weddell Sea |
op_relation |
https://orca.cardiff.ac.uk/id/eprint/129047/1/ncomms12511.pdf Hein, Andrew S., Marrero, Shasta M. https://orca.cardiff.ac.uk/view/cardiffauthors/A2529897K.html orcid:0000-0003-2917-0292 orcid:0000-0003-2917-0292, Woodward, John, Dunning, Stuart A., Winter, Kate, Westoby, Matthew J., Freeman, Stewart P. H. T., Shanks, Richard P. and Sugden, David E. 2016. Mid-Holocene pulse of thinning in the Weddell Sea sector of the West Antarctic ice sheet. Nature Communications 7 (1) , 12511. 10.1038/ncomms12511 https://doi.org/10.1038/ncomms12511 file https://orca.cardiff.ac.uk/id/eprint/129047/1/ncomms12511.pdf doi:10.1038/ncomms12511 |
op_rights |
cc_by |
op_doi |
https://doi.org/10.1038/ncomms12511 |
container_title |
Nature Communications |
container_volume |
7 |
container_issue |
1 |
_version_ |
1768388681271345152 |