Determination of ice flow velocity in Svalbard from ERS-1 interferometric observations (scientific paper)
Based on ERS-1 data recorded in autumn 1991,differential interferogrammes have allowed the determination of the ice flow of north-west Spitsbergen glaciers. The highest velocity of the d'Arodesbreen and the Fjortendejulibreen, observed in their equilibrium zone, was 3cm and 6.6cm per day, respe...
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Norsk Polarinstitutt/CNES/Norsk Polarinstitutt
2001
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ftnipr:oai:nipr.repo.nii.ac.jp:00002383 2023-05-15T16:22:15+02:00 Determination of ice flow velocity in Svalbard from ERS-1 interferometric observations (scientific paper) Lefauconnier,Bernard Massonnet,Didier Anker,Geir 2001-03 https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=2383 http://id.nii.ac.jp/1291/00002383/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=2383&item_no=1&attribute_id=18&file_no=1 en eng Norsk Polarinstitutt/CNES/Norsk Polarinstitutt https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=2383 http://id.nii.ac.jp/1291/00002383/ AA00733561 Memoirs of National Institute of Polar Research. Special issue, 54, 279-290(2001-03) https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=2383&item_no=1&attribute_id=18&file_no=1 Departmental Bulletin Paper P(論文) 2001 ftnipr 2022-11-12T19:43:08Z Based on ERS-1 data recorded in autumn 1991,differential interferogrammes have allowed the determination of the ice flow of north-west Spitsbergen glaciers. The highest velocity of the d'Arodesbreen and the Fjortendejulibreen, observed in their equilibrium zone, was 3cm and 6.6cm per day, respectively. The large Kronebreen (700(km)^2) is fed by two plateaux, Isachsenfonna and Holtedahlfonna. Along the longitudinal axis of Isachsenfonna, the velocity was near constant, around 20cm per day over a distance of 20km, while the velocity on Holtedahlfonna increased from near zero in the higher basin to 52cm per day at 15km to the calving front. The obtained velocities were in excess of 48% of the annual average velocity measured by GPS at three locations. Interferometric pairs were obtained at the end of the ablation period when the presence of subglacial meltwater can still lead a high velocity. These relatively high rates of velocity indicate that the basal sliding of Isachsenfonna and Holtedahlfonna is important and that the glacier sole must be at the melting point down to the front. The present temperature distribution in the glacier is still possibly influenced by a surge, which occurred 130 years ago. Report glacier Memoirs of National Institute of Polar Research Polar Research Svalbard Spitsbergen National Institute of Polar Research Repository, Japan Holtedahlfonna ENVELOPE(13.730,13.730,79.011,79.011) Isachsenfonna ENVELOPE(13.000,13.000,79.000,79.000) Kronebreen ENVELOPE(13.333,13.333,78.833,78.833) Svalbard |
institution |
Open Polar |
collection |
National Institute of Polar Research Repository, Japan |
op_collection_id |
ftnipr |
language |
English |
description |
Based on ERS-1 data recorded in autumn 1991,differential interferogrammes have allowed the determination of the ice flow of north-west Spitsbergen glaciers. The highest velocity of the d'Arodesbreen and the Fjortendejulibreen, observed in their equilibrium zone, was 3cm and 6.6cm per day, respectively. The large Kronebreen (700(km)^2) is fed by two plateaux, Isachsenfonna and Holtedahlfonna. Along the longitudinal axis of Isachsenfonna, the velocity was near constant, around 20cm per day over a distance of 20km, while the velocity on Holtedahlfonna increased from near zero in the higher basin to 52cm per day at 15km to the calving front. The obtained velocities were in excess of 48% of the annual average velocity measured by GPS at three locations. Interferometric pairs were obtained at the end of the ablation period when the presence of subglacial meltwater can still lead a high velocity. These relatively high rates of velocity indicate that the basal sliding of Isachsenfonna and Holtedahlfonna is important and that the glacier sole must be at the melting point down to the front. The present temperature distribution in the glacier is still possibly influenced by a surge, which occurred 130 years ago. |
format |
Report |
author |
Lefauconnier,Bernard Massonnet,Didier Anker,Geir |
spellingShingle |
Lefauconnier,Bernard Massonnet,Didier Anker,Geir Determination of ice flow velocity in Svalbard from ERS-1 interferometric observations (scientific paper) |
author_facet |
Lefauconnier,Bernard Massonnet,Didier Anker,Geir |
author_sort |
Lefauconnier,Bernard |
title |
Determination of ice flow velocity in Svalbard from ERS-1 interferometric observations (scientific paper) |
title_short |
Determination of ice flow velocity in Svalbard from ERS-1 interferometric observations (scientific paper) |
title_full |
Determination of ice flow velocity in Svalbard from ERS-1 interferometric observations (scientific paper) |
title_fullStr |
Determination of ice flow velocity in Svalbard from ERS-1 interferometric observations (scientific paper) |
title_full_unstemmed |
Determination of ice flow velocity in Svalbard from ERS-1 interferometric observations (scientific paper) |
title_sort |
determination of ice flow velocity in svalbard from ers-1 interferometric observations (scientific paper) |
publisher |
Norsk Polarinstitutt/CNES/Norsk Polarinstitutt |
publishDate |
2001 |
url |
https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=2383 http://id.nii.ac.jp/1291/00002383/ https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=2383&item_no=1&attribute_id=18&file_no=1 |
long_lat |
ENVELOPE(13.730,13.730,79.011,79.011) ENVELOPE(13.000,13.000,79.000,79.000) ENVELOPE(13.333,13.333,78.833,78.833) |
geographic |
Holtedahlfonna Isachsenfonna Kronebreen Svalbard |
geographic_facet |
Holtedahlfonna Isachsenfonna Kronebreen Svalbard |
genre |
glacier Memoirs of National Institute of Polar Research Polar Research Svalbard Spitsbergen |
genre_facet |
glacier Memoirs of National Institute of Polar Research Polar Research Svalbard Spitsbergen |
op_relation |
https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=2383 http://id.nii.ac.jp/1291/00002383/ AA00733561 Memoirs of National Institute of Polar Research. Special issue, 54, 279-290(2001-03) https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=2383&item_no=1&attribute_id=18&file_no=1 |
_version_ |
1766010214790725632 |