Dynamic behaviour of Rutford Ice Stream
The grounding-line region of Rutford Ice Stream was surveyed from the ground during 1978–79 and 1979–80, and from the air in 1980–81. Maps of surface elevation and ice thickness of an area of 1 000 km2 allow the grounding line to be delineated and show that the ice stream consists of several distinc...
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International Glaciological Society
1982
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Online Access: | http://nora.nerc.ac.uk/id/eprint/524501/ https://doi.org/10.3189/S0260305500002950 |
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ftnerc:oai:nora.nerc.ac.uk:524501 2023-05-15T13:29:17+02:00 Dynamic behaviour of Rutford Ice Stream Stephenson, S.N Doake, C.S.M 1982 http://nora.nerc.ac.uk/id/eprint/524501/ https://doi.org/10.3189/S0260305500002950 unknown International Glaciological Society Stephenson, S.N; Doake, C.S.M. 1982 Dynamic behaviour of Rutford Ice Stream. Annals of Glaciology, 3. 295-299. https://doi.org/10.3189/S0260305500002950 <https://doi.org/10.3189/S0260305500002950> Publication - Article PeerReviewed 1982 ftnerc https://doi.org/10.3189/S0260305500002950 2023-02-04T19:48:53Z The grounding-line region of Rutford Ice Stream was surveyed from the ground during 1978–79 and 1979–80, and from the air in 1980–81. Maps of surface elevation and ice thickness of an area of 1 000 km2 allow the grounding line to be delineated and show that the ice stream consists of several distinct fingers of thick ice trending parallel to the flow. In one area, the floating ice is more than 2 000 m thick. Hydrostatic tiltmeters were used to pinpoint the grounding line. Repeated survey of a network of stakes gave velocity and strain-rates for both longitudinal and transverse profiles. Radio echo-fading pattern studies showed the ice to be completely sliding near the grounding line. Modelling of the ice stream, using steady-state theory, shows that the bottom melting rate is around 1.8 m a−1. The small surface and bottom gradients imply that the position of the grounding line may be sensitive to small changes in ice thickness. Article in Journal/Newspaper Annals of Glaciology Rutford Ice Stream Natural Environment Research Council: NERC Open Research Archive Rutford ENVELOPE(-85.300,-85.300,-78.600,-78.600) Rutford Ice Stream ENVELOPE(-80.000,-80.000,-79.167,-79.167) Annals of Glaciology 3 295 299 |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
unknown |
description |
The grounding-line region of Rutford Ice Stream was surveyed from the ground during 1978–79 and 1979–80, and from the air in 1980–81. Maps of surface elevation and ice thickness of an area of 1 000 km2 allow the grounding line to be delineated and show that the ice stream consists of several distinct fingers of thick ice trending parallel to the flow. In one area, the floating ice is more than 2 000 m thick. Hydrostatic tiltmeters were used to pinpoint the grounding line. Repeated survey of a network of stakes gave velocity and strain-rates for both longitudinal and transverse profiles. Radio echo-fading pattern studies showed the ice to be completely sliding near the grounding line. Modelling of the ice stream, using steady-state theory, shows that the bottom melting rate is around 1.8 m a−1. The small surface and bottom gradients imply that the position of the grounding line may be sensitive to small changes in ice thickness. |
format |
Article in Journal/Newspaper |
author |
Stephenson, S.N Doake, C.S.M |
spellingShingle |
Stephenson, S.N Doake, C.S.M Dynamic behaviour of Rutford Ice Stream |
author_facet |
Stephenson, S.N Doake, C.S.M |
author_sort |
Stephenson, S.N |
title |
Dynamic behaviour of Rutford Ice Stream |
title_short |
Dynamic behaviour of Rutford Ice Stream |
title_full |
Dynamic behaviour of Rutford Ice Stream |
title_fullStr |
Dynamic behaviour of Rutford Ice Stream |
title_full_unstemmed |
Dynamic behaviour of Rutford Ice Stream |
title_sort |
dynamic behaviour of rutford ice stream |
publisher |
International Glaciological Society |
publishDate |
1982 |
url |
http://nora.nerc.ac.uk/id/eprint/524501/ https://doi.org/10.3189/S0260305500002950 |
long_lat |
ENVELOPE(-85.300,-85.300,-78.600,-78.600) ENVELOPE(-80.000,-80.000,-79.167,-79.167) |
geographic |
Rutford Rutford Ice Stream |
geographic_facet |
Rutford Rutford Ice Stream |
genre |
Annals of Glaciology Rutford Ice Stream |
genre_facet |
Annals of Glaciology Rutford Ice Stream |
op_relation |
Stephenson, S.N; Doake, C.S.M. 1982 Dynamic behaviour of Rutford Ice Stream. Annals of Glaciology, 3. 295-299. https://doi.org/10.3189/S0260305500002950 <https://doi.org/10.3189/S0260305500002950> |
op_doi |
https://doi.org/10.3189/S0260305500002950 |
container_title |
Annals of Glaciology |
container_volume |
3 |
container_start_page |
295 |
op_container_end_page |
299 |
_version_ |
1765999728074424320 |