Regular patterns in frictional resistance of ice-stream beds seen by surface data inversion
Fast-flowing glaciers and ice streams are pathways for ice discharge from the interior of the Antarctic Ice Sheet to ice shelves, at rates controlled by conditions at the ice-bed interface. Using recently compiled high-resolution data sets and a standard inverse method, we computed basal shear stres...
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American Association for the Advancement of Science
2013
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ftnerc:oai:nora.nerc.ac.uk:503366 2024-02-11T09:57:46+01:00 Regular patterns in frictional resistance of ice-stream beds seen by surface data inversion Sergienko, Olga V. Hindmarsh, Richard C.A. 2013-11-29 http://nora.nerc.ac.uk/id/eprint/503366/ unknown American Association for the Advancement of Science Sergienko, Olga V.; Hindmarsh, Richard C.A. orcid:0000-0003-1633-2416 . 2013 Regular patterns in frictional resistance of ice-stream beds seen by surface data inversion. Science, 342 (6162). 1086-1089. https://doi.org/10.1126/science.1243903 <https://doi.org/10.1126/science.1243903> Publication - Article PeerReviewed 2013 ftnerc https://doi.org/10.1126/science.1243903 2024-01-26T00:03:24Z Fast-flowing glaciers and ice streams are pathways for ice discharge from the interior of the Antarctic Ice Sheet to ice shelves, at rates controlled by conditions at the ice-bed interface. Using recently compiled high-resolution data sets and a standard inverse method, we computed basal shear stress distributions beneath Pine Island and Thwaites Glaciers, which are currently losing mass at an accelerating rate. The inversions reveal the presence of rib-like patterns of very high basal shear stress embedded within much larger areas with zero basal shear stress. Their colocation with highs in the gradient of hydraulic potential suggests that subglacial water may control the evolution of these high shear stress ribs, potentially causing migration of the grounding line by changes in basal resistance in its vicinity. Article in Journal/Newspaper Antarc* Antarctic Ice Sheet Ice Shelves Natural Environment Research Council: NERC Open Research Archive Antarctic The Antarctic Science 342 6162 1086 1089 |
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Open Polar |
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Natural Environment Research Council: NERC Open Research Archive |
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ftnerc |
language |
unknown |
description |
Fast-flowing glaciers and ice streams are pathways for ice discharge from the interior of the Antarctic Ice Sheet to ice shelves, at rates controlled by conditions at the ice-bed interface. Using recently compiled high-resolution data sets and a standard inverse method, we computed basal shear stress distributions beneath Pine Island and Thwaites Glaciers, which are currently losing mass at an accelerating rate. The inversions reveal the presence of rib-like patterns of very high basal shear stress embedded within much larger areas with zero basal shear stress. Their colocation with highs in the gradient of hydraulic potential suggests that subglacial water may control the evolution of these high shear stress ribs, potentially causing migration of the grounding line by changes in basal resistance in its vicinity. |
format |
Article in Journal/Newspaper |
author |
Sergienko, Olga V. Hindmarsh, Richard C.A. |
spellingShingle |
Sergienko, Olga V. Hindmarsh, Richard C.A. Regular patterns in frictional resistance of ice-stream beds seen by surface data inversion |
author_facet |
Sergienko, Olga V. Hindmarsh, Richard C.A. |
author_sort |
Sergienko, Olga V. |
title |
Regular patterns in frictional resistance of ice-stream beds seen by surface data inversion |
title_short |
Regular patterns in frictional resistance of ice-stream beds seen by surface data inversion |
title_full |
Regular patterns in frictional resistance of ice-stream beds seen by surface data inversion |
title_fullStr |
Regular patterns in frictional resistance of ice-stream beds seen by surface data inversion |
title_full_unstemmed |
Regular patterns in frictional resistance of ice-stream beds seen by surface data inversion |
title_sort |
regular patterns in frictional resistance of ice-stream beds seen by surface data inversion |
publisher |
American Association for the Advancement of Science |
publishDate |
2013 |
url |
http://nora.nerc.ac.uk/id/eprint/503366/ |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic Ice Sheet Ice Shelves |
genre_facet |
Antarc* Antarctic Ice Sheet Ice Shelves |
op_relation |
Sergienko, Olga V.; Hindmarsh, Richard C.A. orcid:0000-0003-1633-2416 . 2013 Regular patterns in frictional resistance of ice-stream beds seen by surface data inversion. Science, 342 (6162). 1086-1089. https://doi.org/10.1126/science.1243903 <https://doi.org/10.1126/science.1243903> |
op_doi |
https://doi.org/10.1126/science.1243903 |
container_title |
Science |
container_volume |
342 |
container_issue |
6162 |
container_start_page |
1086 |
op_container_end_page |
1089 |
_version_ |
1790593311708282880 |