Contribution to the Movement and the form of Ice Sheets in the Arctic and Antarctic
Abstract Starting from Glen’s flow law for ice and from a series of assumptions based in part on observations in Greenland and in the Jungfraujoch, the velocity distribution (horizontal velocity component) and surface configuration is derived for a strip-shaped ice sheet in a stationary state. For t...
Published in: | Journal of Glaciology |
---|---|
Main Author: | |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Cambridge University Press (CUP)
1961
|
Subjects: | |
Online Access: | http://dx.doi.org/10.1017/s0022143000017548 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000017548 |
id |
crcambridgeupr:10.1017/s0022143000017548 |
---|---|
record_format |
openpolar |
spelling |
crcambridgeupr:10.1017/s0022143000017548 2024-04-28T08:00:45+00:00 Contribution to the Movement and the form of Ice Sheets in the Arctic and Antarctic Haefeli, R. 1961 http://dx.doi.org/10.1017/s0022143000017548 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000017548 en eng Cambridge University Press (CUP) Journal of Glaciology volume 3, issue 30, page 1133-1151 ISSN 0022-1430 1727-5652 Earth-Surface Processes journal-article 1961 crcambridgeupr https://doi.org/10.1017/s0022143000017548 2024-04-09T06:55:10Z Abstract Starting from Glen’s flow law for ice and from a series of assumptions based in part on observations in Greenland and in the Jungfraujoch, the velocity distribution (horizontal velocity component) and surface configuration is derived for a strip-shaped ice sheet in a stationary state. For the choice n = 3 − 4 of the exponent in the power-law flow relation, there is extensive agreement between the theoretically calculated surface profile and the east-west profile measured through “Station Centrale” by Expéditions Polaires Françaises. The corresponding theoretical solution for a circular ice sheet is also given. As a first application of this theory, an attempt is made to calculate the average rate of accumulation in Antarctica from its surface profile (assumed circular in plan) and from the flow-law parameters derived from the Greenland Ice Sheet. It is also shown that a change in accumulation has only a small influence on the total ice thickness of an ice sheet. A method of calculating approximately the age of ice in an ice sheet, based on the foregoing theory, is illustrated by applying it to the Greenland Ice Sheet. After comparing the present theory with that of Nye, a general expression for the surface profile of an ice sheet with constant accumulation is set up and discussed by means of comparison with two profiles through Antarctica. Article in Journal/Newspaper Antarc* Antarctic Antarctica Arctic Greenland Ice Sheet Journal of Glaciology Cambridge University Press Journal of Glaciology 3 30 1133 1151 |
institution |
Open Polar |
collection |
Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
topic |
Earth-Surface Processes |
spellingShingle |
Earth-Surface Processes Haefeli, R. Contribution to the Movement and the form of Ice Sheets in the Arctic and Antarctic |
topic_facet |
Earth-Surface Processes |
description |
Abstract Starting from Glen’s flow law for ice and from a series of assumptions based in part on observations in Greenland and in the Jungfraujoch, the velocity distribution (horizontal velocity component) and surface configuration is derived for a strip-shaped ice sheet in a stationary state. For the choice n = 3 − 4 of the exponent in the power-law flow relation, there is extensive agreement between the theoretically calculated surface profile and the east-west profile measured through “Station Centrale” by Expéditions Polaires Françaises. The corresponding theoretical solution for a circular ice sheet is also given. As a first application of this theory, an attempt is made to calculate the average rate of accumulation in Antarctica from its surface profile (assumed circular in plan) and from the flow-law parameters derived from the Greenland Ice Sheet. It is also shown that a change in accumulation has only a small influence on the total ice thickness of an ice sheet. A method of calculating approximately the age of ice in an ice sheet, based on the foregoing theory, is illustrated by applying it to the Greenland Ice Sheet. After comparing the present theory with that of Nye, a general expression for the surface profile of an ice sheet with constant accumulation is set up and discussed by means of comparison with two profiles through Antarctica. |
format |
Article in Journal/Newspaper |
author |
Haefeli, R. |
author_facet |
Haefeli, R. |
author_sort |
Haefeli, R. |
title |
Contribution to the Movement and the form of Ice Sheets in the Arctic and Antarctic |
title_short |
Contribution to the Movement and the form of Ice Sheets in the Arctic and Antarctic |
title_full |
Contribution to the Movement and the form of Ice Sheets in the Arctic and Antarctic |
title_fullStr |
Contribution to the Movement and the form of Ice Sheets in the Arctic and Antarctic |
title_full_unstemmed |
Contribution to the Movement and the form of Ice Sheets in the Arctic and Antarctic |
title_sort |
contribution to the movement and the form of ice sheets in the arctic and antarctic |
publisher |
Cambridge University Press (CUP) |
publishDate |
1961 |
url |
http://dx.doi.org/10.1017/s0022143000017548 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000017548 |
genre |
Antarc* Antarctic Antarctica Arctic Greenland Ice Sheet Journal of Glaciology |
genre_facet |
Antarc* Antarctic Antarctica Arctic Greenland Ice Sheet Journal of Glaciology |
op_source |
Journal of Glaciology volume 3, issue 30, page 1133-1151 ISSN 0022-1430 1727-5652 |
op_doi |
https://doi.org/10.1017/s0022143000017548 |
container_title |
Journal of Glaciology |
container_volume |
3 |
container_issue |
30 |
container_start_page |
1133 |
op_container_end_page |
1151 |
_version_ |
1797572836823400448 |