Morphology and Dynamics of Ice Rises
Abstract Profile surveys are presented of four ice rises on the east coast of the Antarctic Peninsula. On Butler Island velocity measurements were also made. The ice rises behave as miniature ice caps frozen to flat horizontal bedrock and provide a simple system for the study of laws of ice flow. De...
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Language: | English |
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Cambridge University Press (CUP)
1980
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Online Access: | http://dx.doi.org/10.1017/s0022143000010261 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000010261 |
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crcambridgeupr:10.1017/s0022143000010261 2024-03-03T08:38:32+00:00 Morphology and Dynamics of Ice Rises Martin, P. J. Sanderson, T. J. O. 1980 http://dx.doi.org/10.1017/s0022143000010261 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000010261 en eng Cambridge University Press (CUP) Journal of Glaciology volume 25, issue 91, page 33-46 ISSN 0022-1430 1727-5652 Earth-Surface Processes journal-article 1980 crcambridgeupr https://doi.org/10.1017/s0022143000010261 2024-02-08T08:34:04Z Abstract Profile surveys are presented of four ice rises on the east coast of the Antarctic Peninsula. On Butler Island velocity measurements were also made. The ice rises behave as miniature ice caps frozen to flat horizontal bedrock and provide a simple system for the study of laws of ice flow. Deformation is principally by shear through the ice mass. Velocity measurements provide a value of n = 3.13±0.52 for the flow law . Each ice rise is bounded on one side by ice shelf and on the other side by open sea. Towards open sea the profiles are found to agree well with steady-state theoretical profiles and they supply a value of for temperature – 13.5°C and stress range 0.5–1.3 bar. Towards ice shelf the profiles are elongated and they deviate from the theoretical profile. This may be due to compressive stress in the ice shelf causing migration of the grounding line down sloping bedrock. No significantly anomalous behaviour is found in the summit region. Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Butler Island Ice Shelf Journal of Glaciology Cambridge University Press Antarctic The Antarctic Antarctic Peninsula Butler Island ENVELOPE(76.218,76.218,-69.364,-69.364) Journal of Glaciology 25 91 33 46 |
institution |
Open Polar |
collection |
Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
topic |
Earth-Surface Processes |
spellingShingle |
Earth-Surface Processes Martin, P. J. Sanderson, T. J. O. Morphology and Dynamics of Ice Rises |
topic_facet |
Earth-Surface Processes |
description |
Abstract Profile surveys are presented of four ice rises on the east coast of the Antarctic Peninsula. On Butler Island velocity measurements were also made. The ice rises behave as miniature ice caps frozen to flat horizontal bedrock and provide a simple system for the study of laws of ice flow. Deformation is principally by shear through the ice mass. Velocity measurements provide a value of n = 3.13±0.52 for the flow law . Each ice rise is bounded on one side by ice shelf and on the other side by open sea. Towards open sea the profiles are found to agree well with steady-state theoretical profiles and they supply a value of for temperature – 13.5°C and stress range 0.5–1.3 bar. Towards ice shelf the profiles are elongated and they deviate from the theoretical profile. This may be due to compressive stress in the ice shelf causing migration of the grounding line down sloping bedrock. No significantly anomalous behaviour is found in the summit region. |
format |
Article in Journal/Newspaper |
author |
Martin, P. J. Sanderson, T. J. O. |
author_facet |
Martin, P. J. Sanderson, T. J. O. |
author_sort |
Martin, P. J. |
title |
Morphology and Dynamics of Ice Rises |
title_short |
Morphology and Dynamics of Ice Rises |
title_full |
Morphology and Dynamics of Ice Rises |
title_fullStr |
Morphology and Dynamics of Ice Rises |
title_full_unstemmed |
Morphology and Dynamics of Ice Rises |
title_sort |
morphology and dynamics of ice rises |
publisher |
Cambridge University Press (CUP) |
publishDate |
1980 |
url |
http://dx.doi.org/10.1017/s0022143000010261 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000010261 |
long_lat |
ENVELOPE(76.218,76.218,-69.364,-69.364) |
geographic |
Antarctic The Antarctic Antarctic Peninsula Butler Island |
geographic_facet |
Antarctic The Antarctic Antarctic Peninsula Butler Island |
genre |
Antarc* Antarctic Antarctic Peninsula Butler Island Ice Shelf Journal of Glaciology |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Butler Island Ice Shelf Journal of Glaciology |
op_source |
Journal of Glaciology volume 25, issue 91, page 33-46 ISSN 0022-1430 1727-5652 |
op_doi |
https://doi.org/10.1017/s0022143000010261 |
container_title |
Journal of Glaciology |
container_volume |
25 |
container_issue |
91 |
container_start_page |
33 |
op_container_end_page |
46 |
_version_ |
1792506936058445824 |