On the Relation of Net Balance, Ice Flow, and Surface Lowering of Lewis Glacier, Mount Kenya, East Africa, 1982–86
Abstract The second 4 year phase of a long-term observation program on Lewis Glacier, Mount Kenya, was completed in March 1986. As for the 1978–82 interval, net-balance results at a stake network and repeated mapping of the ice-surface topography allowed assessment of the mass economy by both “glaci...
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Language: | English |
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Cambridge University Press (CUP)
1987
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Online Access: | http://dx.doi.org/10.1017/s0022143000008893 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000008893 |
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crcambridgeupr:10.1017/s0022143000008893 2024-03-03T08:45:59+00:00 On the Relation of Net Balance, Ice Flow, and Surface Lowering of Lewis Glacier, Mount Kenya, East Africa, 1982–86 Hastenrath, Stefan 1987 http://dx.doi.org/10.1017/s0022143000008893 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000008893 en eng Cambridge University Press (CUP) Journal of Glaciology volume 33, issue 115, page 315-318 ISSN 0022-1430 1727-5652 Earth-Surface Processes journal-article 1987 crcambridgeupr https://doi.org/10.1017/s0022143000008893 2024-02-08T08:41:37Z Abstract The second 4 year phase of a long-term observation program on Lewis Glacier, Mount Kenya, was completed in March 1986. As for the 1978–82 interval, net-balance results at a stake network and repeated mapping of the ice-surface topography allowed assessment of the mass economy by both “glaciological” and “geodetic” methods. The general findings from the 1978–82 observations are confirmed: the vertical flow component is directed downward in the upper glacier, and upward in the lower glacier; surface lowering and negative net balance increase down-glacier; ice flow mitigates surface lowering by the negative net balance in the lower glacier, but enhances it in the upper glacier. However, the major difference between the 1982–86 and 1978–82 periods is the progressive slow-down of ice flow. This entails a reduction of mass redistribution, in consequence of which the surface lowering becomes increasingly dependent on the in-situ net balance. It is expected that this circumstance will simplify any inference on future glacier behavior. Article in Journal/Newspaper Journal of Glaciology Lewis Glacier Cambridge University Press Journal of Glaciology 33 115 315 318 |
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Open Polar |
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Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
topic |
Earth-Surface Processes |
spellingShingle |
Earth-Surface Processes Hastenrath, Stefan On the Relation of Net Balance, Ice Flow, and Surface Lowering of Lewis Glacier, Mount Kenya, East Africa, 1982–86 |
topic_facet |
Earth-Surface Processes |
description |
Abstract The second 4 year phase of a long-term observation program on Lewis Glacier, Mount Kenya, was completed in March 1986. As for the 1978–82 interval, net-balance results at a stake network and repeated mapping of the ice-surface topography allowed assessment of the mass economy by both “glaciological” and “geodetic” methods. The general findings from the 1978–82 observations are confirmed: the vertical flow component is directed downward in the upper glacier, and upward in the lower glacier; surface lowering and negative net balance increase down-glacier; ice flow mitigates surface lowering by the negative net balance in the lower glacier, but enhances it in the upper glacier. However, the major difference between the 1982–86 and 1978–82 periods is the progressive slow-down of ice flow. This entails a reduction of mass redistribution, in consequence of which the surface lowering becomes increasingly dependent on the in-situ net balance. It is expected that this circumstance will simplify any inference on future glacier behavior. |
format |
Article in Journal/Newspaper |
author |
Hastenrath, Stefan |
author_facet |
Hastenrath, Stefan |
author_sort |
Hastenrath, Stefan |
title |
On the Relation of Net Balance, Ice Flow, and Surface Lowering of Lewis Glacier, Mount Kenya, East Africa, 1982–86 |
title_short |
On the Relation of Net Balance, Ice Flow, and Surface Lowering of Lewis Glacier, Mount Kenya, East Africa, 1982–86 |
title_full |
On the Relation of Net Balance, Ice Flow, and Surface Lowering of Lewis Glacier, Mount Kenya, East Africa, 1982–86 |
title_fullStr |
On the Relation of Net Balance, Ice Flow, and Surface Lowering of Lewis Glacier, Mount Kenya, East Africa, 1982–86 |
title_full_unstemmed |
On the Relation of Net Balance, Ice Flow, and Surface Lowering of Lewis Glacier, Mount Kenya, East Africa, 1982–86 |
title_sort |
on the relation of net balance, ice flow, and surface lowering of lewis glacier, mount kenya, east africa, 1982–86 |
publisher |
Cambridge University Press (CUP) |
publishDate |
1987 |
url |
http://dx.doi.org/10.1017/s0022143000008893 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000008893 |
genre |
Journal of Glaciology Lewis Glacier |
genre_facet |
Journal of Glaciology Lewis Glacier |
op_source |
Journal of Glaciology volume 33, issue 115, page 315-318 ISSN 0022-1430 1727-5652 |
op_doi |
https://doi.org/10.1017/s0022143000008893 |
container_title |
Journal of Glaciology |
container_volume |
33 |
container_issue |
115 |
container_start_page |
315 |
op_container_end_page |
318 |
_version_ |
1792501739458396160 |