Continued Decrease of Ice-Flow Velocity at Lewis Glacier, Mount Kenya, East Africa
Abstract Our earlier monitoring program on Lewis Glacier, Mount Kenya, indicated a slow-down of the ice flow to January 1982, while based on the numerical modeling of the ice dynamics a further drastic decrease of the ice flow was predicted from the 1978 to the 1985 datum. This paper presents veloci...
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Cambridge University Press (CUP)
1987
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Online Access: | http://dx.doi.org/10.1017/s0022143000005384 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000005384 |
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crcambridgeupr:10.1017/s0022143000005384 2024-03-03T08:46:03+00:00 Continued Decrease of Ice-Flow Velocity at Lewis Glacier, Mount Kenya, East Africa Hastenrath, Stefan 1987 http://dx.doi.org/10.1017/s0022143000005384 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000005384 en eng Cambridge University Press (CUP) Journal of Glaciology volume 33, issue 113, page 79-82 ISSN 0022-1430 1727-5652 Earth-Surface Processes journal-article 1987 crcambridgeupr https://doi.org/10.1017/s0022143000005384 2024-02-08T08:40:23Z Abstract Our earlier monitoring program on Lewis Glacier, Mount Kenya, indicated a slow-down of the ice flow to January 1982, while based on the numerical modeling of the ice dynamics a further drastic decrease of the ice flow was predicted from the 1978 to the 1985 datum. This paper presents velocity measurements over the years 1982–83, 1984, and 1985. Changes of ice-flow conditions from 1978 to the mid 1980s are characterized by a velocity decrease by nearly half; a decrease of the maximum mass flux by more than half; a flattening and up-glacier shift of the velocity and mass-flux maxima; an up-glacier displacement of the transition between prevailingly longitudinal crevasses in the lower glacier and transverse crevasses in the upper glacier; and a terminus retreat by about 50 m. In consequence of the very weak ice flow remaining in Lewis Glacier, thinning and terminus retreat of the glacier are now primarily controlled by the in-situ net balance. Article in Journal/Newspaper Journal of Glaciology Lewis Glacier Cambridge University Press Journal of Glaciology 33 113 79 82 |
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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 Continued Decrease of Ice-Flow Velocity at Lewis Glacier, Mount Kenya, East Africa |
topic_facet |
Earth-Surface Processes |
description |
Abstract Our earlier monitoring program on Lewis Glacier, Mount Kenya, indicated a slow-down of the ice flow to January 1982, while based on the numerical modeling of the ice dynamics a further drastic decrease of the ice flow was predicted from the 1978 to the 1985 datum. This paper presents velocity measurements over the years 1982–83, 1984, and 1985. Changes of ice-flow conditions from 1978 to the mid 1980s are characterized by a velocity decrease by nearly half; a decrease of the maximum mass flux by more than half; a flattening and up-glacier shift of the velocity and mass-flux maxima; an up-glacier displacement of the transition between prevailingly longitudinal crevasses in the lower glacier and transverse crevasses in the upper glacier; and a terminus retreat by about 50 m. In consequence of the very weak ice flow remaining in Lewis Glacier, thinning and terminus retreat of the glacier are now primarily controlled by the in-situ net balance. |
format |
Article in Journal/Newspaper |
author |
Hastenrath, Stefan |
author_facet |
Hastenrath, Stefan |
author_sort |
Hastenrath, Stefan |
title |
Continued Decrease of Ice-Flow Velocity at Lewis Glacier, Mount Kenya, East Africa |
title_short |
Continued Decrease of Ice-Flow Velocity at Lewis Glacier, Mount Kenya, East Africa |
title_full |
Continued Decrease of Ice-Flow Velocity at Lewis Glacier, Mount Kenya, East Africa |
title_fullStr |
Continued Decrease of Ice-Flow Velocity at Lewis Glacier, Mount Kenya, East Africa |
title_full_unstemmed |
Continued Decrease of Ice-Flow Velocity at Lewis Glacier, Mount Kenya, East Africa |
title_sort |
continued decrease of ice-flow velocity at lewis glacier, mount kenya, east africa |
publisher |
Cambridge University Press (CUP) |
publishDate |
1987 |
url |
http://dx.doi.org/10.1017/s0022143000005384 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000005384 |
genre |
Journal of Glaciology Lewis Glacier |
genre_facet |
Journal of Glaciology Lewis Glacier |
op_source |
Journal of Glaciology volume 33, issue 113, page 79-82 ISSN 0022-1430 1727-5652 |
op_doi |
https://doi.org/10.1017/s0022143000005384 |
container_title |
Journal of Glaciology |
container_volume |
33 |
container_issue |
113 |
container_start_page |
79 |
op_container_end_page |
82 |
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1792501900543787008 |