Temporal changes of glacier hydrological systems indicated by isotopic and related observations at Austre Okstindbreen, Okstindan, Norway, 1976-87
Twelve years of observation at Austre Okstindbreen, Norway, have demonstrated that the drainage systems of glaciers change with time, both between and within seasons. Random events indicative of instability have been recorded, and disruption of the glacier systems has preceded some outbursts from Ka...
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ftumanchesterpub:oai:pure.atira.dk:publications/56b8423d-4508-4c2a-a152-9b7929d18f91 2023-11-12T04:01:24+01:00 Temporal changes of glacier hydrological systems indicated by isotopic and related observations at Austre Okstindbreen, Okstindan, Norway, 1976-87 Theakstone, W. H. Knudsen, N. T. 1989 https://research.manchester.ac.uk/en/publications/56b8423d-4508-4c2a-a152-9b7929d18f91 eng eng info:eu-repo/semantics/restrictedAccess Theakstone , W H & Knudsen , N T 1989 , ' Temporal changes of glacier hydrological systems indicated by isotopic and related observations at Austre Okstindbreen, Okstindan, Norway, 1976-87 ' , Annals of Glaciology , vol. 13 , pp. 252-256 . article 1989 ftumanchesterpub 2023-10-30T09:12:01Z Twelve years of observation at Austre Okstindbreen, Norway, have demonstrated that the drainage systems of glaciers change with time, both between and within seasons. Random events indicative of instability have been recorded, and disruption of the glacier systems has preceded some outbursts from Kalvtjorna, the glacier-dammed lake. The results of dye-tracer tests suggest that, although discrete systems exist within the glacier, these vary between years. They also demonstrate that some of the water entering the glacier is stored temporarily as the capacities of the systems change. The chemical composition of river water emerging from Austre Okstindbreen differs from year to year, and it is found that both systematic patterns of variation and random deviations from them occur. Although waters of different origin mix within drainage systems, not all systematic patterns of isotopic composition are eliminated by this mixture; diurnal variations are superimposed on longer-term trends, which sheds light on drainage conditions. Between-year differences of within-season trends probably reflect changing spatial patterns of drainage. -from Authors Article in Journal/Newspaper Annals of Glaciology glacier The University of Manchester: Research Explorer austre Okstindbreen ENVELOPE(14.293,14.293,66.014,66.014) Dammed Lake ENVELOPE(-68.258,-68.258,68.496,68.496) Norway Okstindbreen ENVELOPE(14.148,14.148,65.987,65.987) |
institution |
Open Polar |
collection |
The University of Manchester: Research Explorer |
op_collection_id |
ftumanchesterpub |
language |
English |
description |
Twelve years of observation at Austre Okstindbreen, Norway, have demonstrated that the drainage systems of glaciers change with time, both between and within seasons. Random events indicative of instability have been recorded, and disruption of the glacier systems has preceded some outbursts from Kalvtjorna, the glacier-dammed lake. The results of dye-tracer tests suggest that, although discrete systems exist within the glacier, these vary between years. They also demonstrate that some of the water entering the glacier is stored temporarily as the capacities of the systems change. The chemical composition of river water emerging from Austre Okstindbreen differs from year to year, and it is found that both systematic patterns of variation and random deviations from them occur. Although waters of different origin mix within drainage systems, not all systematic patterns of isotopic composition are eliminated by this mixture; diurnal variations are superimposed on longer-term trends, which sheds light on drainage conditions. Between-year differences of within-season trends probably reflect changing spatial patterns of drainage. -from Authors |
format |
Article in Journal/Newspaper |
author |
Theakstone, W. H. Knudsen, N. T. |
spellingShingle |
Theakstone, W. H. Knudsen, N. T. Temporal changes of glacier hydrological systems indicated by isotopic and related observations at Austre Okstindbreen, Okstindan, Norway, 1976-87 |
author_facet |
Theakstone, W. H. Knudsen, N. T. |
author_sort |
Theakstone, W. H. |
title |
Temporal changes of glacier hydrological systems indicated by isotopic and related observations at Austre Okstindbreen, Okstindan, Norway, 1976-87 |
title_short |
Temporal changes of glacier hydrological systems indicated by isotopic and related observations at Austre Okstindbreen, Okstindan, Norway, 1976-87 |
title_full |
Temporal changes of glacier hydrological systems indicated by isotopic and related observations at Austre Okstindbreen, Okstindan, Norway, 1976-87 |
title_fullStr |
Temporal changes of glacier hydrological systems indicated by isotopic and related observations at Austre Okstindbreen, Okstindan, Norway, 1976-87 |
title_full_unstemmed |
Temporal changes of glacier hydrological systems indicated by isotopic and related observations at Austre Okstindbreen, Okstindan, Norway, 1976-87 |
title_sort |
temporal changes of glacier hydrological systems indicated by isotopic and related observations at austre okstindbreen, okstindan, norway, 1976-87 |
publishDate |
1989 |
url |
https://research.manchester.ac.uk/en/publications/56b8423d-4508-4c2a-a152-9b7929d18f91 |
long_lat |
ENVELOPE(14.293,14.293,66.014,66.014) ENVELOPE(-68.258,-68.258,68.496,68.496) ENVELOPE(14.148,14.148,65.987,65.987) |
geographic |
austre Okstindbreen Dammed Lake Norway Okstindbreen |
geographic_facet |
austre Okstindbreen Dammed Lake Norway Okstindbreen |
genre |
Annals of Glaciology glacier |
genre_facet |
Annals of Glaciology glacier |
op_source |
Theakstone , W H & Knudsen , N T 1989 , ' Temporal changes of glacier hydrological systems indicated by isotopic and related observations at Austre Okstindbreen, Okstindan, Norway, 1976-87 ' , Annals of Glaciology , vol. 13 , pp. 252-256 . |
op_rights |
info:eu-repo/semantics/restrictedAccess |
_version_ |
1782332458219339776 |