The initiation of glacier surging at Fridtjovbreen, Svalbard
Glacier surges in Svalbard have long durations and multi-year terminations, but much less is known regarding surge initiation in the archipelago. Fridtjovbreen, a 12 km long glacier in central Spitsbergen, advanced ~2.8 km during a surge in the 1990s at a maximum rate of ~4.2 m d-1. Differential dua...
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ftuhipublicatio:oai:pure.atira.dk:publications/5f499518-bfe0-45b5-9577-336d40222076 2024-09-15T17:39:55+00:00 The initiation of glacier surging at Fridtjovbreen, Svalbard Murray, T Luckman, A Strozzi, T Nuttall, AM 2003-01-01 https://pure.uhi.ac.uk/en/publications/5f499518-bfe0-45b5-9577-336d40222076 https://doi.org/10.3189/172756403781816275 eng eng https://pure.uhi.ac.uk/en/publications/5f499518-bfe0-45b5-9577-336d40222076 info:eu-repo/semantics/restrictedAccess Murray , T , Luckman , A , Strozzi , T & Nuttall , AM 2003 , ' The initiation of glacier surging at Fridtjovbreen, Svalbard ' , Annals of Glaciology , vol. 36 , pp. 110-116 . https://doi.org/10.3189/172756403781816275 article 2003 ftuhipublicatio https://doi.org/10.3189/172756403781816275 2024-06-24T23:48:36Z Glacier surges in Svalbard have long durations and multi-year terminations, but much less is known regarding surge initiation in the archipelago. Fridtjovbreen, a 12 km long glacier in central Spitsbergen, advanced ~2.8 km during a surge in the 1990s at a maximum rate of ~4.2 m d-1. Differential dual-azimuth satellite radar interferometry (SRI) is used to produce ten snapshots of three-dimensional surface dynamics and four digital elevation models covering the period October 1991–October 1997. The glacier velocity rose slowly and uniformly until June 1995. It then increased dramatically to a measured maximum of ~2.5 m d-1 during February and May 1996, and by October 1997 it had dropped. We attempt to evaluate errors in the calculated velocities. Systematic errors are evaluated using the apparent displacement of bedrock, ~0.03 m d-1. Errors arise from assumptions during processing, for example that ice-flow direction does not change during the surge. Two independent measurements using dual-azimuth processing show the mean absolute change in flow direction was ~1.2°. This study covers fast-flow initiation and peak flow, but not the deceleration phase. The SRI observations show a progressive acceleration phase to the surge, with no evidence of a surge front propagating down-glacier. Article in Journal/Newspaper Annals of Glaciology glacier Long Glacier Svalbard Spitsbergen University of the Highlands and Islands: Research Database of UHI Annals of Glaciology 36 110 116 |
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Open Polar |
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University of the Highlands and Islands: Research Database of UHI |
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ftuhipublicatio |
language |
English |
description |
Glacier surges in Svalbard have long durations and multi-year terminations, but much less is known regarding surge initiation in the archipelago. Fridtjovbreen, a 12 km long glacier in central Spitsbergen, advanced ~2.8 km during a surge in the 1990s at a maximum rate of ~4.2 m d-1. Differential dual-azimuth satellite radar interferometry (SRI) is used to produce ten snapshots of three-dimensional surface dynamics and four digital elevation models covering the period October 1991–October 1997. The glacier velocity rose slowly and uniformly until June 1995. It then increased dramatically to a measured maximum of ~2.5 m d-1 during February and May 1996, and by October 1997 it had dropped. We attempt to evaluate errors in the calculated velocities. Systematic errors are evaluated using the apparent displacement of bedrock, ~0.03 m d-1. Errors arise from assumptions during processing, for example that ice-flow direction does not change during the surge. Two independent measurements using dual-azimuth processing show the mean absolute change in flow direction was ~1.2°. This study covers fast-flow initiation and peak flow, but not the deceleration phase. The SRI observations show a progressive acceleration phase to the surge, with no evidence of a surge front propagating down-glacier. |
format |
Article in Journal/Newspaper |
author |
Murray, T Luckman, A Strozzi, T Nuttall, AM |
spellingShingle |
Murray, T Luckman, A Strozzi, T Nuttall, AM The initiation of glacier surging at Fridtjovbreen, Svalbard |
author_facet |
Murray, T Luckman, A Strozzi, T Nuttall, AM |
author_sort |
Murray, T |
title |
The initiation of glacier surging at Fridtjovbreen, Svalbard |
title_short |
The initiation of glacier surging at Fridtjovbreen, Svalbard |
title_full |
The initiation of glacier surging at Fridtjovbreen, Svalbard |
title_fullStr |
The initiation of glacier surging at Fridtjovbreen, Svalbard |
title_full_unstemmed |
The initiation of glacier surging at Fridtjovbreen, Svalbard |
title_sort |
initiation of glacier surging at fridtjovbreen, svalbard |
publishDate |
2003 |
url |
https://pure.uhi.ac.uk/en/publications/5f499518-bfe0-45b5-9577-336d40222076 https://doi.org/10.3189/172756403781816275 |
genre |
Annals of Glaciology glacier Long Glacier Svalbard Spitsbergen |
genre_facet |
Annals of Glaciology glacier Long Glacier Svalbard Spitsbergen |
op_source |
Murray , T , Luckman , A , Strozzi , T & Nuttall , AM 2003 , ' The initiation of glacier surging at Fridtjovbreen, Svalbard ' , Annals of Glaciology , vol. 36 , pp. 110-116 . https://doi.org/10.3189/172756403781816275 |
op_relation |
https://pure.uhi.ac.uk/en/publications/5f499518-bfe0-45b5-9577-336d40222076 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.3189/172756403781816275 |
container_title |
Annals of Glaciology |
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36 |
container_start_page |
110 |
op_container_end_page |
116 |
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1810483438802698240 |