Simulated Glacier Sliding over an Obstacle
Abstract The sliding of temperate ice over two obstacles with sine-wave profiles (wavelength, 0.53 m; maximum slope, 0.22) and low thermal conductivity has been reproduced at full scale within a steel chamber. As expected, large cavities form between the ice and the obstacles so that the drag is lim...
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Language: | English |
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Cambridge University Press (CUP)
1979
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Online Access: | http://dx.doi.org/10.1017/s0022143000029798 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000029798 |
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crcambridgeupr:10.1017/s0022143000029798 2024-04-28T08:26:45+00:00 Simulated Glacier Sliding over an Obstacle Brepson, R. 1979 http://dx.doi.org/10.1017/s0022143000029798 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000029798 en eng Cambridge University Press (CUP) Journal of Glaciology volume 23, issue 89, page 143-156 ISSN 0022-1430 1727-5652 Earth-Surface Processes journal-article 1979 crcambridgeupr https://doi.org/10.1017/s0022143000029798 2024-04-09T06:56:14Z Abstract The sliding of temperate ice over two obstacles with sine-wave profiles (wavelength, 0.53 m; maximum slope, 0.22) and low thermal conductivity has been reproduced at full scale within a steel chamber. As expected, large cavities form between the ice and the obstacles so that the drag is limited. However, the delayed elasticity of bubbly ice modifies the expected behaviour. At the base of the ice a fine-grained, bubble-free blue ice layer develops. The shear strain concentrates on the up-stream side of bumps and in the blue ice layer. Tap-water ions enhance tertiary creep-rates. Article in Journal/Newspaper Journal of Glaciology Cambridge University Press Journal of Glaciology 23 89 143 156 |
institution |
Open Polar |
collection |
Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
topic |
Earth-Surface Processes |
spellingShingle |
Earth-Surface Processes Brepson, R. Simulated Glacier Sliding over an Obstacle |
topic_facet |
Earth-Surface Processes |
description |
Abstract The sliding of temperate ice over two obstacles with sine-wave profiles (wavelength, 0.53 m; maximum slope, 0.22) and low thermal conductivity has been reproduced at full scale within a steel chamber. As expected, large cavities form between the ice and the obstacles so that the drag is limited. However, the delayed elasticity of bubbly ice modifies the expected behaviour. At the base of the ice a fine-grained, bubble-free blue ice layer develops. The shear strain concentrates on the up-stream side of bumps and in the blue ice layer. Tap-water ions enhance tertiary creep-rates. |
format |
Article in Journal/Newspaper |
author |
Brepson, R. |
author_facet |
Brepson, R. |
author_sort |
Brepson, R. |
title |
Simulated Glacier Sliding over an Obstacle |
title_short |
Simulated Glacier Sliding over an Obstacle |
title_full |
Simulated Glacier Sliding over an Obstacle |
title_fullStr |
Simulated Glacier Sliding over an Obstacle |
title_full_unstemmed |
Simulated Glacier Sliding over an Obstacle |
title_sort |
simulated glacier sliding over an obstacle |
publisher |
Cambridge University Press (CUP) |
publishDate |
1979 |
url |
http://dx.doi.org/10.1017/s0022143000029798 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000029798 |
genre |
Journal of Glaciology |
genre_facet |
Journal of Glaciology |
op_source |
Journal of Glaciology volume 23, issue 89, page 143-156 ISSN 0022-1430 1727-5652 |
op_doi |
https://doi.org/10.1017/s0022143000029798 |
container_title |
Journal of Glaciology |
container_volume |
23 |
container_issue |
89 |
container_start_page |
143 |
op_container_end_page |
156 |
_version_ |
1797586005561180160 |