Pine Island Glacier and its drainage basin: results from radio echo-sounding
Retreat of the grounding lines of West Antarctic ice streams may lead to the collapse of the West Antarctic ice sheet. Pine Island Glacier has been pinpointed as an ice stream in which rapid retreat is likely, especially as it is not buttressed by an ice shelf. Radio echo-sounding flights have produ...
Published in: | Annals of Glaciology |
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International Glaciological Society
1982
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Online Access: | http://nora.nerc.ac.uk/id/eprint/524330/ https://doi.org/10.3189/S0260305500002548 |
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ftnerc:oai:nora.nerc.ac.uk:524330 2023-05-15T13:29:21+02:00 Pine Island Glacier and its drainage basin: results from radio echo-sounding Crabtree, R.D. Doake, C.S.M. 1982 http://nora.nerc.ac.uk/id/eprint/524330/ https://doi.org/10.3189/S0260305500002548 unknown International Glaciological Society Crabtree, R.D.; Doake, C.S.M. 1982 Pine Island Glacier and its drainage basin: results from radio echo-sounding. Annals of Glaciology, 3. 65-70. https://doi.org/10.3189/S0260305500002548 <https://doi.org/10.3189/S0260305500002548> Publication - Article PeerReviewed 1982 ftnerc https://doi.org/10.3189/S0260305500002548 2023-02-04T19:48:50Z Retreat of the grounding lines of West Antarctic ice streams may lead to the collapse of the West Antarctic ice sheet. Pine Island Glacier has been pinpointed as an ice stream in which rapid retreat is likely, especially as it is not buttressed by an ice shelf. Radio echo-sounding flights have produced a longitudinal thickness profile for the glacier. The ice presently rests on a bedrock sill which may play a crucial role in controlling the position of the grounding line. The profile can be fitted to a steadystate model but this alone is not adequate to determine steady- or non-steady-state behaviour. Landsat images show that the ice front undergoes periodic calving. Mass-balance calculations suggest that accumulation in the catchment may exceed ablation by a factor of 2. However, accumulation data are poor and there is no firm evidence of a build-up of ice within the Pine Island Glacier drainage basin. Article in Journal/Newspaper Annals of Glaciology Antarc* Antarctic Ice Sheet Ice Shelf Pine Island Glacier Natural Environment Research Council: NERC Open Research Archive Antarctic West Antarctic Ice Sheet Pine Island Glacier ENVELOPE(-101.000,-101.000,-75.000,-75.000) Annals of Glaciology 3 65 70 |
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Open Polar |
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Natural Environment Research Council: NERC Open Research Archive |
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ftnerc |
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description |
Retreat of the grounding lines of West Antarctic ice streams may lead to the collapse of the West Antarctic ice sheet. Pine Island Glacier has been pinpointed as an ice stream in which rapid retreat is likely, especially as it is not buttressed by an ice shelf. Radio echo-sounding flights have produced a longitudinal thickness profile for the glacier. The ice presently rests on a bedrock sill which may play a crucial role in controlling the position of the grounding line. The profile can be fitted to a steadystate model but this alone is not adequate to determine steady- or non-steady-state behaviour. Landsat images show that the ice front undergoes periodic calving. Mass-balance calculations suggest that accumulation in the catchment may exceed ablation by a factor of 2. However, accumulation data are poor and there is no firm evidence of a build-up of ice within the Pine Island Glacier drainage basin. |
format |
Article in Journal/Newspaper |
author |
Crabtree, R.D. Doake, C.S.M. |
spellingShingle |
Crabtree, R.D. Doake, C.S.M. Pine Island Glacier and its drainage basin: results from radio echo-sounding |
author_facet |
Crabtree, R.D. Doake, C.S.M. |
author_sort |
Crabtree, R.D. |
title |
Pine Island Glacier and its drainage basin: results from radio echo-sounding |
title_short |
Pine Island Glacier and its drainage basin: results from radio echo-sounding |
title_full |
Pine Island Glacier and its drainage basin: results from radio echo-sounding |
title_fullStr |
Pine Island Glacier and its drainage basin: results from radio echo-sounding |
title_full_unstemmed |
Pine Island Glacier and its drainage basin: results from radio echo-sounding |
title_sort |
pine island glacier and its drainage basin: results from radio echo-sounding |
publisher |
International Glaciological Society |
publishDate |
1982 |
url |
http://nora.nerc.ac.uk/id/eprint/524330/ https://doi.org/10.3189/S0260305500002548 |
long_lat |
ENVELOPE(-101.000,-101.000,-75.000,-75.000) |
geographic |
Antarctic West Antarctic Ice Sheet Pine Island Glacier |
geographic_facet |
Antarctic West Antarctic Ice Sheet Pine Island Glacier |
genre |
Annals of Glaciology Antarc* Antarctic Ice Sheet Ice Shelf Pine Island Glacier |
genre_facet |
Annals of Glaciology Antarc* Antarctic Ice Sheet Ice Shelf Pine Island Glacier |
op_relation |
Crabtree, R.D.; Doake, C.S.M. 1982 Pine Island Glacier and its drainage basin: results from radio echo-sounding. Annals of Glaciology, 3. 65-70. https://doi.org/10.3189/S0260305500002548 <https://doi.org/10.3189/S0260305500002548> |
op_doi |
https://doi.org/10.3189/S0260305500002548 |
container_title |
Annals of Glaciology |
container_volume |
3 |
container_start_page |
65 |
op_container_end_page |
70 |
_version_ |
1766000156044427264 |