Rate of Growth or Shrinkage of Nonequilibrium Ice Sheets
Abstract An analysis is made of the time required to build up an ice-age ice sheet and of the time required to destroy such an ice sheet. The calculations are based on the approximation that the theory of perfect plasticity is valid. It is concluded that the time required to build up an ice-age ice...
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Language: | English |
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Cambridge University Press (CUP)
1964
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Online Access: | http://dx.doi.org/10.1017/s0022143000028744 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000028744 |
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crcambridgeupr:10.1017/s0022143000028744 2024-03-03T08:45:22+00:00 Rate of Growth or Shrinkage of Nonequilibrium Ice Sheets Weertman, J. 1964 http://dx.doi.org/10.1017/s0022143000028744 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000028744 en eng Cambridge University Press (CUP) Journal of Glaciology volume 5, issue 38, page 145-158 ISSN 0022-1430 1727-5652 Earth-Surface Processes journal-article 1964 crcambridgeupr https://doi.org/10.1017/s0022143000028744 2024-02-08T08:39:08Z Abstract An analysis is made of the time required to build up an ice-age ice sheet and of the time required to destroy such an ice sheet. The calculations are based on the approximation that the theory of perfect plasticity is valid. It is concluded that the time required to build up an ice-age ice sheet is longer than the time required to eliminate it. If it is assumed that the accumulation rate of an ice-age ice sheet lies in the range of 0.2 to 0.6 m./yr., it is found that the growth time of a large ice sheet is of the order of 15,000 to 30,000 yr. Ablation rates of to 2 m./yr. lead to shrinkage times of the order of 2,000 to 4,000 yr., provided ablation occurs over an appreciable area of the ice sheet. Article in Journal/Newspaper Ice Sheet Journal of Glaciology Cambridge University Press Journal of Glaciology 5 38 145 158 |
institution |
Open Polar |
collection |
Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
topic |
Earth-Surface Processes |
spellingShingle |
Earth-Surface Processes Weertman, J. Rate of Growth or Shrinkage of Nonequilibrium Ice Sheets |
topic_facet |
Earth-Surface Processes |
description |
Abstract An analysis is made of the time required to build up an ice-age ice sheet and of the time required to destroy such an ice sheet. The calculations are based on the approximation that the theory of perfect plasticity is valid. It is concluded that the time required to build up an ice-age ice sheet is longer than the time required to eliminate it. If it is assumed that the accumulation rate of an ice-age ice sheet lies in the range of 0.2 to 0.6 m./yr., it is found that the growth time of a large ice sheet is of the order of 15,000 to 30,000 yr. Ablation rates of to 2 m./yr. lead to shrinkage times of the order of 2,000 to 4,000 yr., provided ablation occurs over an appreciable area of the ice sheet. |
format |
Article in Journal/Newspaper |
author |
Weertman, J. |
author_facet |
Weertman, J. |
author_sort |
Weertman, J. |
title |
Rate of Growth or Shrinkage of Nonequilibrium Ice Sheets |
title_short |
Rate of Growth or Shrinkage of Nonequilibrium Ice Sheets |
title_full |
Rate of Growth or Shrinkage of Nonequilibrium Ice Sheets |
title_fullStr |
Rate of Growth or Shrinkage of Nonequilibrium Ice Sheets |
title_full_unstemmed |
Rate of Growth or Shrinkage of Nonequilibrium Ice Sheets |
title_sort |
rate of growth or shrinkage of nonequilibrium ice sheets |
publisher |
Cambridge University Press (CUP) |
publishDate |
1964 |
url |
http://dx.doi.org/10.1017/s0022143000028744 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000028744 |
genre |
Ice Sheet Journal of Glaciology |
genre_facet |
Ice Sheet Journal of Glaciology |
op_source |
Journal of Glaciology volume 5, issue 38, page 145-158 ISSN 0022-1430 1727-5652 |
op_doi |
https://doi.org/10.1017/s0022143000028744 |
container_title |
Journal of Glaciology |
container_volume |
5 |
container_issue |
38 |
container_start_page |
145 |
op_container_end_page |
158 |
_version_ |
1792500907920850944 |