The drainage pattern of Hansbreen and Werenskioldbreen, two polythermal glaciers in Svalbard
To improve our understanding of Svalbard-type polythermal glacier drainage, hydraulic geometry models of the subglacial hydrology of two contrasting glaciers in Svalbard have been constructed. The models are tested against a uniquely long and rich set of field observations spanning 45 years. Digital...
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Norwegian Polar Institute
2003
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ftjpolarres:oai:journals.openacademia.net:article/2118 2023-05-15T16:22:09+02:00 The drainage pattern of Hansbreen and Werenskioldbreen, two polythermal glaciers in Svalbard Pälli, Anja Moore, John C. Jania, Jacek Kolondra, Leszek Glowacki, Piotr 2003-01-12 application/pdf https://polarresearch.net/index.php/polar/article/view/2118 https://doi.org/10.3402/polar.v22i2.6465 eng eng Norwegian Polar Institute https://polarresearch.net/index.php/polar/article/view/2118/5369 https://polarresearch.net/index.php/polar/article/view/2118 doi:10.3402/polar.v22i2.6465 Copyright (c) 2018 Polar Research Polar Research; Vol. 22 No. 2 (2003); 355-371 1751-8369 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2003 ftjpolarres https://doi.org/10.3402/polar.v22i2.6465 2021-11-11T19:12:09Z To improve our understanding of Svalbard-type polythermal glacier drainage, hydraulic geometry models of the subglacial hydrology of two contrasting glaciers in Svalbard have been constructed. The models are tested against a uniquely long and rich set of field observations spanning 45 years. Digital elevation models (DEMs) were constructed from bedrock data measured with ground penetrating radar and surface data of two medium-sized polythermal glaciers, Hansbreen and Werenskioldbreen, in south-west Spitsbergen. Hansbreen has a low angle bed with over-deepenings and a calving front, while Werenskioldbreen has steeper bed and terminates on land. Together they are representative of many Svalbard glaciers. The DEMs were used to derive maps of hydraulic potential and subglacial drainage networks. Validation of the models was done using field observations including location mapping and speleological exploration of active moulins, positions of main river outflows, dyetracing and water chemistry studies, and observations of water pressure inside moulins. Results suggest that the water pressure is generally close to ice overburden pressure but varies greatly depending on local conditions such as bed location, the thickness of cold ice layer, the thickness of the glacier and seasonal changes in meltwater input. Article in Journal/Newspaper glacier Polar Research Svalbard Spitsbergen Polar Research (E-Journal) Svalbard Hansbreen ENVELOPE(15.650,15.650,77.075,77.075) Werenskioldbreen ENVELOPE(15.336,15.336,77.077,77.077) Polar Research 22 2 355 371 |
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Open Polar |
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Polar Research (E-Journal) |
op_collection_id |
ftjpolarres |
language |
English |
description |
To improve our understanding of Svalbard-type polythermal glacier drainage, hydraulic geometry models of the subglacial hydrology of two contrasting glaciers in Svalbard have been constructed. The models are tested against a uniquely long and rich set of field observations spanning 45 years. Digital elevation models (DEMs) were constructed from bedrock data measured with ground penetrating radar and surface data of two medium-sized polythermal glaciers, Hansbreen and Werenskioldbreen, in south-west Spitsbergen. Hansbreen has a low angle bed with over-deepenings and a calving front, while Werenskioldbreen has steeper bed and terminates on land. Together they are representative of many Svalbard glaciers. The DEMs were used to derive maps of hydraulic potential and subglacial drainage networks. Validation of the models was done using field observations including location mapping and speleological exploration of active moulins, positions of main river outflows, dyetracing and water chemistry studies, and observations of water pressure inside moulins. Results suggest that the water pressure is generally close to ice overburden pressure but varies greatly depending on local conditions such as bed location, the thickness of cold ice layer, the thickness of the glacier and seasonal changes in meltwater input. |
format |
Article in Journal/Newspaper |
author |
Pälli, Anja Moore, John C. Jania, Jacek Kolondra, Leszek Glowacki, Piotr |
spellingShingle |
Pälli, Anja Moore, John C. Jania, Jacek Kolondra, Leszek Glowacki, Piotr The drainage pattern of Hansbreen and Werenskioldbreen, two polythermal glaciers in Svalbard |
author_facet |
Pälli, Anja Moore, John C. Jania, Jacek Kolondra, Leszek Glowacki, Piotr |
author_sort |
Pälli, Anja |
title |
The drainage pattern of Hansbreen and Werenskioldbreen, two polythermal glaciers in Svalbard |
title_short |
The drainage pattern of Hansbreen and Werenskioldbreen, two polythermal glaciers in Svalbard |
title_full |
The drainage pattern of Hansbreen and Werenskioldbreen, two polythermal glaciers in Svalbard |
title_fullStr |
The drainage pattern of Hansbreen and Werenskioldbreen, two polythermal glaciers in Svalbard |
title_full_unstemmed |
The drainage pattern of Hansbreen and Werenskioldbreen, two polythermal glaciers in Svalbard |
title_sort |
drainage pattern of hansbreen and werenskioldbreen, two polythermal glaciers in svalbard |
publisher |
Norwegian Polar Institute |
publishDate |
2003 |
url |
https://polarresearch.net/index.php/polar/article/view/2118 https://doi.org/10.3402/polar.v22i2.6465 |
long_lat |
ENVELOPE(15.650,15.650,77.075,77.075) ENVELOPE(15.336,15.336,77.077,77.077) |
geographic |
Svalbard Hansbreen Werenskioldbreen |
geographic_facet |
Svalbard Hansbreen Werenskioldbreen |
genre |
glacier Polar Research Svalbard Spitsbergen |
genre_facet |
glacier Polar Research Svalbard Spitsbergen |
op_source |
Polar Research; Vol. 22 No. 2 (2003); 355-371 1751-8369 |
op_relation |
https://polarresearch.net/index.php/polar/article/view/2118/5369 https://polarresearch.net/index.php/polar/article/view/2118 doi:10.3402/polar.v22i2.6465 |
op_rights |
Copyright (c) 2018 Polar Research |
op_doi |
https://doi.org/10.3402/polar.v22i2.6465 |
container_title |
Polar Research |
container_volume |
22 |
container_issue |
2 |
container_start_page |
355 |
op_container_end_page |
371 |
_version_ |
1766010123269963776 |