The Debris Content of Surging Glaciers in Svalbard and Iceland
In Svalbard and Iceland there appears to be much more debris entrained in glaciers that surge than in those which do not. Conditions particularly favourable for the basal incorporation of debris develop as a consequence of the high flow velocities attained by a surge. These are increased cavitation...
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Language: | English |
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Cambridge University Press (CUP)
1975
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Online Access: | http://dx.doi.org/10.1017/s0022143000021924 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000021924 |
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crcambridgeupr:10.1017/s0022143000021924 2024-03-03T08:45:41+00:00 The Debris Content of Surging Glaciers in Svalbard and Iceland Clapperton, Chalmers M. 1975 http://dx.doi.org/10.1017/s0022143000021924 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000021924 en eng Cambridge University Press (CUP) Journal of Glaciology volume 14, issue 72, page 395-406 ISSN 0022-1430 1727-5652 Earth-Surface Processes journal-article 1975 crcambridgeupr https://doi.org/10.1017/s0022143000021924 2024-02-08T08:32:56Z In Svalbard and Iceland there appears to be much more debris entrained in glaciers that surge than in those which do not. Conditions particularly favourable for the basal incorporation of debris develop as a consequence of the high flow velocities attained by a surge. These are increased cavitation in the lee of obstacles and an increased supply of basal melt water resulting from frictional heat and from the trigger zone. Layers of regelation ice incorporating debris can thus develop to a much greater vertical and horizontal extent than in non-surging glaciers. Excessive shearing, and the distortion of foliation structures in the terminal zone of compressive flow, enhance the vertical development of the debris-rich regelation layers. Glaciers that surge over outwash and/or fjord-bottom sediments become particularly rich in debris. Article in Journal/Newspaper Iceland Journal of Glaciology Svalbard Cambridge University Press Svalbard Journal of Glaciology 14 72 395 406 |
institution |
Open Polar |
collection |
Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
topic |
Earth-Surface Processes |
spellingShingle |
Earth-Surface Processes Clapperton, Chalmers M. The Debris Content of Surging Glaciers in Svalbard and Iceland |
topic_facet |
Earth-Surface Processes |
description |
In Svalbard and Iceland there appears to be much more debris entrained in glaciers that surge than in those which do not. Conditions particularly favourable for the basal incorporation of debris develop as a consequence of the high flow velocities attained by a surge. These are increased cavitation in the lee of obstacles and an increased supply of basal melt water resulting from frictional heat and from the trigger zone. Layers of regelation ice incorporating debris can thus develop to a much greater vertical and horizontal extent than in non-surging glaciers. Excessive shearing, and the distortion of foliation structures in the terminal zone of compressive flow, enhance the vertical development of the debris-rich regelation layers. Glaciers that surge over outwash and/or fjord-bottom sediments become particularly rich in debris. |
format |
Article in Journal/Newspaper |
author |
Clapperton, Chalmers M. |
author_facet |
Clapperton, Chalmers M. |
author_sort |
Clapperton, Chalmers M. |
title |
The Debris Content of Surging Glaciers in Svalbard and Iceland |
title_short |
The Debris Content of Surging Glaciers in Svalbard and Iceland |
title_full |
The Debris Content of Surging Glaciers in Svalbard and Iceland |
title_fullStr |
The Debris Content of Surging Glaciers in Svalbard and Iceland |
title_full_unstemmed |
The Debris Content of Surging Glaciers in Svalbard and Iceland |
title_sort |
debris content of surging glaciers in svalbard and iceland |
publisher |
Cambridge University Press (CUP) |
publishDate |
1975 |
url |
http://dx.doi.org/10.1017/s0022143000021924 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000021924 |
geographic |
Svalbard |
geographic_facet |
Svalbard |
genre |
Iceland Journal of Glaciology Svalbard |
genre_facet |
Iceland Journal of Glaciology Svalbard |
op_source |
Journal of Glaciology volume 14, issue 72, page 395-406 ISSN 0022-1430 1727-5652 |
op_doi |
https://doi.org/10.1017/s0022143000021924 |
container_title |
Journal of Glaciology |
container_volume |
14 |
container_issue |
72 |
container_start_page |
395 |
op_container_end_page |
406 |
_version_ |
1792501331775193088 |