On The Temperature Profile and the Age Profile in the Central Part of Cold Ice Sheets
Abstract The generalized Glen’s law έ = έ 0 T n exp ( kθ ) is used to calculate die horizontal and vertical velocity profiles and from these the temperature and age profiles of cold ice sheets. It is shown that, by substituting for θ a function increasing linearly with height, velocity profiles for...
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Language: | English |
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Cambridge University Press (CUP)
1971
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Online Access: | http://dx.doi.org/10.1017/s0022143000012958 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000012958 |
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crcambridgeupr:10.1017/s0022143000012958 2024-03-03T08:46:09+00:00 On The Temperature Profile and the Age Profile in the Central Part of Cold Ice Sheets Philberth, K. Federer, B. 1971 http://dx.doi.org/10.1017/s0022143000012958 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000012958 en eng Cambridge University Press (CUP) Journal of Glaciology volume 10, issue 58, page 3-14 ISSN 0022-1430 1727-5652 Earth-Surface Processes journal-article 1971 crcambridgeupr https://doi.org/10.1017/s0022143000012958 2024-02-08T08:36:10Z Abstract The generalized Glen’s law έ = έ 0 T n exp ( kθ ) is used to calculate die horizontal and vertical velocity profiles and from these the temperature and age profiles of cold ice sheets. It is shown that, by substituting for θ a function increasing linearly with height, velocity profiles for all ice sheets are obtained which represent excellent approximations to the true ones, since, above a critical height h e where the deviation from linearity becomes large, the influence of temperature on ice flow becomes negligible. In a comparison of the present theory with Robin’s (1955) treatment a larger temperature difference Δ T of up to 30% is obtained. Furthermore the present theory yields an age considerably increased compared with Nye’s model; e.g. more than 50% at a relative height of h\H = 0·1. Article in Journal/Newspaper Journal of Glaciology Cambridge University Press Journal of Glaciology 10 58 3 14 |
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Open Polar |
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Cambridge University Press |
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crcambridgeupr |
language |
English |
topic |
Earth-Surface Processes |
spellingShingle |
Earth-Surface Processes Philberth, K. Federer, B. On The Temperature Profile and the Age Profile in the Central Part of Cold Ice Sheets |
topic_facet |
Earth-Surface Processes |
description |
Abstract The generalized Glen’s law έ = έ 0 T n exp ( kθ ) is used to calculate die horizontal and vertical velocity profiles and from these the temperature and age profiles of cold ice sheets. It is shown that, by substituting for θ a function increasing linearly with height, velocity profiles for all ice sheets are obtained which represent excellent approximations to the true ones, since, above a critical height h e where the deviation from linearity becomes large, the influence of temperature on ice flow becomes negligible. In a comparison of the present theory with Robin’s (1955) treatment a larger temperature difference Δ T of up to 30% is obtained. Furthermore the present theory yields an age considerably increased compared with Nye’s model; e.g. more than 50% at a relative height of h\H = 0·1. |
format |
Article in Journal/Newspaper |
author |
Philberth, K. Federer, B. |
author_facet |
Philberth, K. Federer, B. |
author_sort |
Philberth, K. |
title |
On The Temperature Profile and the Age Profile in the Central Part of Cold Ice Sheets |
title_short |
On The Temperature Profile and the Age Profile in the Central Part of Cold Ice Sheets |
title_full |
On The Temperature Profile and the Age Profile in the Central Part of Cold Ice Sheets |
title_fullStr |
On The Temperature Profile and the Age Profile in the Central Part of Cold Ice Sheets |
title_full_unstemmed |
On The Temperature Profile and the Age Profile in the Central Part of Cold Ice Sheets |
title_sort |
on the temperature profile and the age profile in the central part of cold ice sheets |
publisher |
Cambridge University Press (CUP) |
publishDate |
1971 |
url |
http://dx.doi.org/10.1017/s0022143000012958 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000012958 |
genre |
Journal of Glaciology |
genre_facet |
Journal of Glaciology |
op_source |
Journal of Glaciology volume 10, issue 58, page 3-14 ISSN 0022-1430 1727-5652 |
op_doi |
https://doi.org/10.1017/s0022143000012958 |
container_title |
Journal of Glaciology |
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10 |
container_issue |
58 |
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3 |
op_container_end_page |
14 |
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1792502095582068736 |