Extensive storage of basal meltwater in the onset region of a major West Antarctic ice stream
A major meltwater body exists beneath a tributary of Bindschadler Ice Stream, West Antarctica, in a region where subglacial lakes have not been mapped but near where rapid vertical motion of the ice sheet surface has suggested shifting of a subglacial water body. The water is trapped by a local reve...
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Geological Society of America
2007
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Online Access: | http://nora.nerc.ac.uk/id/eprint/3120/ https://doi.org/10.1130/G23222A.1 |
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ftnerc:oai:nora.nerc.ac.uk:3120 2024-06-09T07:40:25+00:00 Extensive storage of basal meltwater in the onset region of a major West Antarctic ice stream Peters, Leo E. Anandakrishnan, Sridhar Alley, Richard B. Smith, Andrew 2007 http://nora.nerc.ac.uk/id/eprint/3120/ https://doi.org/10.1130/G23222A.1 unknown Geological Society of America Peters, Leo E.; Anandakrishnan, Sridhar; Alley, Richard B.; Smith, Andrew orcid:0000-0001-8577-482X . 2007 Extensive storage of basal meltwater in the onset region of a major West Antarctic ice stream. Geology, 35 (3). 251-254. https://doi.org/10.1130/G23222A.1 <https://doi.org/10.1130/G23222A.1> Glaciology Publication - Article PeerReviewed 2007 ftnerc https://doi.org/10.1130/G23222A.1 2024-05-15T08:44:37Z A major meltwater body exists beneath a tributary of Bindschadler Ice Stream, West Antarctica, in a region where subglacial lakes have not been mapped but near where rapid vertical motion of the ice sheet surface has suggested shifting of a subglacial water body. The water is trapped by a local reversal in ice-air surface slope arising from ice flow over variable basal topography and from the positive feedback of basal lubrication from the trapped water. Strong variations in the water content of the sediments upglacier of the water body arise from a similar process. These results are revealed by a novel application of the amplitude variation with offset (AVO) seismic technique. The existence of such water bodies and of the strong spatial variation in subglacial sediment properties is not captured in current models of subglacial hydrology, lubrication of ice stream motion, and sediment transport. Article in Journal/Newspaper Antarc* Antarctic Antarctica Bindschadler Ice Stream Ice Sheet West Antarctica Natural Environment Research Council: NERC Open Research Archive Antarctic Bindschadler Ice Stream ENVELOPE(-142.000,-142.000,-81.000,-81.000) West Antarctica Geology 35 3 251 |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
unknown |
topic |
Glaciology |
spellingShingle |
Glaciology Peters, Leo E. Anandakrishnan, Sridhar Alley, Richard B. Smith, Andrew Extensive storage of basal meltwater in the onset region of a major West Antarctic ice stream |
topic_facet |
Glaciology |
description |
A major meltwater body exists beneath a tributary of Bindschadler Ice Stream, West Antarctica, in a region where subglacial lakes have not been mapped but near where rapid vertical motion of the ice sheet surface has suggested shifting of a subglacial water body. The water is trapped by a local reversal in ice-air surface slope arising from ice flow over variable basal topography and from the positive feedback of basal lubrication from the trapped water. Strong variations in the water content of the sediments upglacier of the water body arise from a similar process. These results are revealed by a novel application of the amplitude variation with offset (AVO) seismic technique. The existence of such water bodies and of the strong spatial variation in subglacial sediment properties is not captured in current models of subglacial hydrology, lubrication of ice stream motion, and sediment transport. |
format |
Article in Journal/Newspaper |
author |
Peters, Leo E. Anandakrishnan, Sridhar Alley, Richard B. Smith, Andrew |
author_facet |
Peters, Leo E. Anandakrishnan, Sridhar Alley, Richard B. Smith, Andrew |
author_sort |
Peters, Leo E. |
title |
Extensive storage of basal meltwater in the onset region of a major West Antarctic ice stream |
title_short |
Extensive storage of basal meltwater in the onset region of a major West Antarctic ice stream |
title_full |
Extensive storage of basal meltwater in the onset region of a major West Antarctic ice stream |
title_fullStr |
Extensive storage of basal meltwater in the onset region of a major West Antarctic ice stream |
title_full_unstemmed |
Extensive storage of basal meltwater in the onset region of a major West Antarctic ice stream |
title_sort |
extensive storage of basal meltwater in the onset region of a major west antarctic ice stream |
publisher |
Geological Society of America |
publishDate |
2007 |
url |
http://nora.nerc.ac.uk/id/eprint/3120/ https://doi.org/10.1130/G23222A.1 |
long_lat |
ENVELOPE(-142.000,-142.000,-81.000,-81.000) |
geographic |
Antarctic Bindschadler Ice Stream West Antarctica |
geographic_facet |
Antarctic Bindschadler Ice Stream West Antarctica |
genre |
Antarc* Antarctic Antarctica Bindschadler Ice Stream Ice Sheet West Antarctica |
genre_facet |
Antarc* Antarctic Antarctica Bindschadler Ice Stream Ice Sheet West Antarctica |
op_relation |
Peters, Leo E.; Anandakrishnan, Sridhar; Alley, Richard B.; Smith, Andrew orcid:0000-0001-8577-482X . 2007 Extensive storage of basal meltwater in the onset region of a major West Antarctic ice stream. Geology, 35 (3). 251-254. https://doi.org/10.1130/G23222A.1 <https://doi.org/10.1130/G23222A.1> |
op_doi |
https://doi.org/10.1130/G23222A.1 |
container_title |
Geology |
container_volume |
35 |
container_issue |
3 |
container_start_page |
251 |
_version_ |
1801383827706216448 |