New boundary conditions for the West Antarctic ice sheet: subglacial topography beneath Pine Island Glacier
Predictions about future changes in the Amundsen Sea sector of the West Antarctic ice sheet (WAIS) have been hampered by poorly known subglacial topography. Extensive airborne survey has allowed us to derive improved subglacial topography for the Pine Island Glacier basin. The trunk of this glacier...
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American Geophysical Union
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ftnerc:oai:nora.nerc.ac.uk:146 2024-06-09T07:38:19+00:00 New boundary conditions for the West Antarctic ice sheet: subglacial topography beneath Pine Island Glacier Vaughan, David G. Corr, Hugh F.J. Ferraccioli, Fausto Frearson, Nicholas O'Hare, Aidan Mach, Dieter Holt, John W. Blankenship, Donald D. Morse, David L. Young, Duncan A. 2006 text http://nora.nerc.ac.uk/id/eprint/146/ https://nora.nerc.ac.uk/id/eprint/146/1/PIG_topo_final_08_nora.pdf http://www.agu.org/journals/gl/gl0609/2005GL025588/ https://doi.org/10.1029/2005GL025588 en eng American Geophysical Union https://nora.nerc.ac.uk/id/eprint/146/1/PIG_topo_final_08_nora.pdf Vaughan, David G. orcid:0000-0002-9065-0570 Corr, Hugh F.J.; Ferraccioli, Fausto orcid:0000-0002-9347-4736 Frearson, Nicholas; O'Hare, Aidan; Mach, Dieter; Holt, John W.; Blankenship, Donald D.; Morse, David L.; Young, Duncan A. 2006 New boundary conditions for the West Antarctic ice sheet: subglacial topography beneath Pine Island Glacier. Geophysical Research Letters, 33 (9), L09501. 4, pp. https://doi.org/10.1029/2005GL025588 <https://doi.org/10.1029/2005GL025588> Glaciology Publication - Article PeerReviewed 2006 ftnerc https://doi.org/10.1029/2005GL025588 2024-05-15T08:39:04Z Predictions about future changes in the Amundsen Sea sector of the West Antarctic ice sheet (WAIS) have been hampered by poorly known subglacial topography. Extensive airborne survey has allowed us to derive improved subglacial topography for the Pine Island Glacier basin. The trunk of this glacier lies in a narrow, 250-km long, 500-m deep sub-glacial trough, suggesting a long-lived and constrained ice stream. Two tributaries lie in similar troughs, others lie in less defined, shallower troughs. The lower basin of the glacier is surrounded by bedrock, which, after deglaciation and isostatic rebound, could rise above sea level. This feature would impede ice-sheet collapse initiated near the grounding line of this glacier, and prevent its progress into the deepest portions of WAIS. The inland-slope of the bed beneath the trunk of the glacier, however, confirms potential instability of the lower basin, containing sufficient ice to raise global sea by ∼24 cm. Article in Journal/Newspaper Amundsen Sea Antarc* Antarctic Ice Sheet Pine Island Glacier Natural Environment Research Council: NERC Open Research Archive Amundsen Sea Antarctic Pine Island Glacier ENVELOPE(-101.000,-101.000,-75.000,-75.000) West Antarctic Ice Sheet Geophysical Research Letters 33 9 |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
English |
topic |
Glaciology |
spellingShingle |
Glaciology Vaughan, David G. Corr, Hugh F.J. Ferraccioli, Fausto Frearson, Nicholas O'Hare, Aidan Mach, Dieter Holt, John W. Blankenship, Donald D. Morse, David L. Young, Duncan A. New boundary conditions for the West Antarctic ice sheet: subglacial topography beneath Pine Island Glacier |
topic_facet |
Glaciology |
description |
Predictions about future changes in the Amundsen Sea sector of the West Antarctic ice sheet (WAIS) have been hampered by poorly known subglacial topography. Extensive airborne survey has allowed us to derive improved subglacial topography for the Pine Island Glacier basin. The trunk of this glacier lies in a narrow, 250-km long, 500-m deep sub-glacial trough, suggesting a long-lived and constrained ice stream. Two tributaries lie in similar troughs, others lie in less defined, shallower troughs. The lower basin of the glacier is surrounded by bedrock, which, after deglaciation and isostatic rebound, could rise above sea level. This feature would impede ice-sheet collapse initiated near the grounding line of this glacier, and prevent its progress into the deepest portions of WAIS. The inland-slope of the bed beneath the trunk of the glacier, however, confirms potential instability of the lower basin, containing sufficient ice to raise global sea by ∼24 cm. |
format |
Article in Journal/Newspaper |
author |
Vaughan, David G. Corr, Hugh F.J. Ferraccioli, Fausto Frearson, Nicholas O'Hare, Aidan Mach, Dieter Holt, John W. Blankenship, Donald D. Morse, David L. Young, Duncan A. |
author_facet |
Vaughan, David G. Corr, Hugh F.J. Ferraccioli, Fausto Frearson, Nicholas O'Hare, Aidan Mach, Dieter Holt, John W. Blankenship, Donald D. Morse, David L. Young, Duncan A. |
author_sort |
Vaughan, David G. |
title |
New boundary conditions for the West Antarctic ice sheet: subglacial topography beneath Pine Island Glacier |
title_short |
New boundary conditions for the West Antarctic ice sheet: subglacial topography beneath Pine Island Glacier |
title_full |
New boundary conditions for the West Antarctic ice sheet: subglacial topography beneath Pine Island Glacier |
title_fullStr |
New boundary conditions for the West Antarctic ice sheet: subglacial topography beneath Pine Island Glacier |
title_full_unstemmed |
New boundary conditions for the West Antarctic ice sheet: subglacial topography beneath Pine Island Glacier |
title_sort |
new boundary conditions for the west antarctic ice sheet: subglacial topography beneath pine island glacier |
publisher |
American Geophysical Union |
publishDate |
2006 |
url |
http://nora.nerc.ac.uk/id/eprint/146/ https://nora.nerc.ac.uk/id/eprint/146/1/PIG_topo_final_08_nora.pdf http://www.agu.org/journals/gl/gl0609/2005GL025588/ https://doi.org/10.1029/2005GL025588 |
long_lat |
ENVELOPE(-101.000,-101.000,-75.000,-75.000) |
geographic |
Amundsen Sea Antarctic Pine Island Glacier West Antarctic Ice Sheet |
geographic_facet |
Amundsen Sea Antarctic Pine Island Glacier West Antarctic Ice Sheet |
genre |
Amundsen Sea Antarc* Antarctic Ice Sheet Pine Island Glacier |
genre_facet |
Amundsen Sea Antarc* Antarctic Ice Sheet Pine Island Glacier |
op_relation |
https://nora.nerc.ac.uk/id/eprint/146/1/PIG_topo_final_08_nora.pdf Vaughan, David G. orcid:0000-0002-9065-0570 Corr, Hugh F.J.; Ferraccioli, Fausto orcid:0000-0002-9347-4736 Frearson, Nicholas; O'Hare, Aidan; Mach, Dieter; Holt, John W.; Blankenship, Donald D.; Morse, David L.; Young, Duncan A. 2006 New boundary conditions for the West Antarctic ice sheet: subglacial topography beneath Pine Island Glacier. Geophysical Research Letters, 33 (9), L09501. 4, pp. https://doi.org/10.1029/2005GL025588 <https://doi.org/10.1029/2005GL025588> |
op_doi |
https://doi.org/10.1029/2005GL025588 |
container_title |
Geophysical Research Letters |
container_volume |
33 |
container_issue |
9 |
_version_ |
1801371500370984960 |