Drainage of the Austre Okstindbreen Ice-dammed Lake, Okstindan, Norway
Abstract Observations of the discharge, electrical conductivity, cationic content, and isotopic composition of glacier-river water indicate that drainage of the lake dammed at the margin of the glacier Austre Okstindbreen, Okstindan, Norway, is preceded by disruption of the glacier’s drainage system...
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Language: | English |
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Cambridge University Press (CUP)
1988
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Online Access: | http://dx.doi.org/10.1017/s0022143000009102 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000009102 |
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crcambridgeupr:10.1017/s0022143000009102 2024-03-03T08:44:38+00:00 Drainage of the Austre Okstindbreen Ice-dammed Lake, Okstindan, Norway Knudsen, N. Tvis Theakstone, Wilfred H. 1988 http://dx.doi.org/10.1017/s0022143000009102 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000009102 en eng Cambridge University Press (CUP) Journal of Glaciology volume 34, issue 116, page 87-94 ISSN 0022-1430 1727-5652 Earth-Surface Processes journal-article 1988 crcambridgeupr https://doi.org/10.1017/s0022143000009102 2024-02-08T08:34:04Z Abstract Observations of the discharge, electrical conductivity, cationic content, and isotopic composition of glacier-river water indicate that drainage of the lake dammed at the margin of the glacier Austre Okstindbreen, Okstindan, Norway, is preceded by disruption of the glacier’s drainage system(s). Annual studies over a period of 12 years have demonstrated that intense storm precipitation, changes of ablation conditions, and the stage of development of drainage systems all may play a role in triggering drainage of the ice-dammed lake. Water temperature may influence the course of the outburst. The lake has drained on at least ten occasions in the last 12 years. Three of the events (1979, 1985, and 1986) occurred early in the summer, whilst melting of the winter’s snow cover was contributing substantially to glacier-river discharge: high basal water pressure and rapid sliding may have facilitated disruption of drainage conditions within the glacier. In 1982, the lake drained during a severe storm, in 1977 and 1984 shortly after a period of heavy rainfall. During the 1977 and 1984 events, water under pressure burst up through the glacier surface. The lake basin remained partly filled throughout one summer (1980): in-flow of water was balanced by out-flow into the glacier. Article in Journal/Newspaper glacier Journal of Glaciology Cambridge University Press Norway Dammed Lake ENVELOPE(-68.258,-68.258,68.496,68.496) austre Okstindbreen ENVELOPE(14.293,14.293,66.014,66.014) Okstindbreen ENVELOPE(14.148,14.148,65.987,65.987) Journal of Glaciology 34 116 87 94 |
institution |
Open Polar |
collection |
Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
topic |
Earth-Surface Processes |
spellingShingle |
Earth-Surface Processes Knudsen, N. Tvis Theakstone, Wilfred H. Drainage of the Austre Okstindbreen Ice-dammed Lake, Okstindan, Norway |
topic_facet |
Earth-Surface Processes |
description |
Abstract Observations of the discharge, electrical conductivity, cationic content, and isotopic composition of glacier-river water indicate that drainage of the lake dammed at the margin of the glacier Austre Okstindbreen, Okstindan, Norway, is preceded by disruption of the glacier’s drainage system(s). Annual studies over a period of 12 years have demonstrated that intense storm precipitation, changes of ablation conditions, and the stage of development of drainage systems all may play a role in triggering drainage of the ice-dammed lake. Water temperature may influence the course of the outburst. The lake has drained on at least ten occasions in the last 12 years. Three of the events (1979, 1985, and 1986) occurred early in the summer, whilst melting of the winter’s snow cover was contributing substantially to glacier-river discharge: high basal water pressure and rapid sliding may have facilitated disruption of drainage conditions within the glacier. In 1982, the lake drained during a severe storm, in 1977 and 1984 shortly after a period of heavy rainfall. During the 1977 and 1984 events, water under pressure burst up through the glacier surface. The lake basin remained partly filled throughout one summer (1980): in-flow of water was balanced by out-flow into the glacier. |
format |
Article in Journal/Newspaper |
author |
Knudsen, N. Tvis Theakstone, Wilfred H. |
author_facet |
Knudsen, N. Tvis Theakstone, Wilfred H. |
author_sort |
Knudsen, N. Tvis |
title |
Drainage of the Austre Okstindbreen Ice-dammed Lake, Okstindan, Norway |
title_short |
Drainage of the Austre Okstindbreen Ice-dammed Lake, Okstindan, Norway |
title_full |
Drainage of the Austre Okstindbreen Ice-dammed Lake, Okstindan, Norway |
title_fullStr |
Drainage of the Austre Okstindbreen Ice-dammed Lake, Okstindan, Norway |
title_full_unstemmed |
Drainage of the Austre Okstindbreen Ice-dammed Lake, Okstindan, Norway |
title_sort |
drainage of the austre okstindbreen ice-dammed lake, okstindan, norway |
publisher |
Cambridge University Press (CUP) |
publishDate |
1988 |
url |
http://dx.doi.org/10.1017/s0022143000009102 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000009102 |
long_lat |
ENVELOPE(-68.258,-68.258,68.496,68.496) ENVELOPE(14.293,14.293,66.014,66.014) ENVELOPE(14.148,14.148,65.987,65.987) |
geographic |
Norway Dammed Lake austre Okstindbreen Okstindbreen |
geographic_facet |
Norway Dammed Lake austre Okstindbreen Okstindbreen |
genre |
glacier Journal of Glaciology |
genre_facet |
glacier Journal of Glaciology |
op_source |
Journal of Glaciology volume 34, issue 116, page 87-94 ISSN 0022-1430 1727-5652 |
op_doi |
https://doi.org/10.1017/s0022143000009102 |
container_title |
Journal of Glaciology |
container_volume |
34 |
container_issue |
116 |
container_start_page |
87 |
op_container_end_page |
94 |
_version_ |
1792500123838709760 |