Ice-dynamic conditions of Shirase Glacier, Antarctica, inferred from ERS SAR interferometry
peer reviewed The surface velocity field of Shirase Glacier, a fast-flowing East Antarctic outlet glacier, is determined from ERS synthetic aperture radar (SAR) images by means of speckle tracking using phase correlation, a technique which matches small image kernels of two complex SAR images by max...
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ftorbi:oai:orbi.ulg.ac.be:2268/143297 2024-04-21T07:52:30+00:00 Ice-dynamic conditions of Shirase Glacier, Antarctica, inferred from ERS SAR interferometry Pattyn, Frank De Rauw, Dominique Vrij Universiteit Brussels CSL - Centre Spatial de Liège - ULiège 2002 https://orbi.uliege.be/handle/2268/143297 https://orbi.uliege.be/bitstream/2268/143297/1/Pattyn_Derauw2002_JGLAC.pdf https://doi.org/10.3189/172756502781831115 en eng Int Glaciol Soc http://homepages.ulb.ac.be/~fpattyn/papers/Pattyn_Derauw2002_JGLAC.pdf urn:issn:0022-1430 urn:issn:1727-5652 https://orbi.uliege.be/handle/2268/143297 info:hdl:2268/143297 https://orbi.uliege.be/bitstream/2268/143297/1/Pattyn_Derauw2002_JGLAC.pdf doi:10.3189/172756502781831115 scopus-id:2-s2.0-0038163642 open access http://purl.org/coar/access_right/c_abf2 info:eu-repo/semantics/openAccess Journal of Glaciology, 48 (163), 559-565 (2002) Ice dynamics SAR interferometry Coherence tracking Physical chemical mathematical & earth Sciences Earth sciences & physical geography Physique chimie mathématiques & sciences de la terre Sciences de la terre & géographie physique journal article http://purl.org/coar/resource_type/c_6501 info:eu-repo/semantics/article peer reviewed 2002 ftorbi https://doi.org/10.3189/172756502781831115 2024-03-27T14:56:25Z peer reviewed The surface velocity field of Shirase Glacier, a fast-flowing East Antarctic outlet glacier, is determined from ERS synthetic aperture radar (SAR) images by means of speckle tracking using phase correlation, a technique which matches small image kernels of two complex SAR images by maximization of the local coherence. Velocity estimates are used to calculate surface strain rates, which are then used to calculate the large-scale, vertically integrated force balance and to determine the major stress components resisting the driving stress. For the whole glacier system, the driving stress is largely balanced by the basal drag, but with contributions from lateral drag up to 15% of the driving stress at the grounding line. Longitudinal stress gradients have only local importance to the balance of forces, limited to an area of a few square kilometers near the grounding line, where they resist the driving stress. In the grounded part of the glacier, >90% of the total ice velocity is due to basal sliding. Comparison with a balance-flux distribution of the Antarctic ice sheet suggests that the glacier in the downstream part of the Shirase drainage basin is close to equilibrium, showing a slight negative imbalance. Article in Journal/Newspaper Antarc* Antarctic Antarctica Ice Sheet Journal of Glaciology Shirase Glacier University of Liège: ORBi (Open Repository and Bibliography) Journal of Glaciology 48 163 559 565 |
institution |
Open Polar |
collection |
University of Liège: ORBi (Open Repository and Bibliography) |
op_collection_id |
ftorbi |
language |
English |
topic |
Ice dynamics SAR interferometry Coherence tracking Physical chemical mathematical & earth Sciences Earth sciences & physical geography Physique chimie mathématiques & sciences de la terre Sciences de la terre & géographie physique |
spellingShingle |
Ice dynamics SAR interferometry Coherence tracking Physical chemical mathematical & earth Sciences Earth sciences & physical geography Physique chimie mathématiques & sciences de la terre Sciences de la terre & géographie physique Pattyn, Frank De Rauw, Dominique Ice-dynamic conditions of Shirase Glacier, Antarctica, inferred from ERS SAR interferometry |
topic_facet |
Ice dynamics SAR interferometry Coherence tracking Physical chemical mathematical & earth Sciences Earth sciences & physical geography Physique chimie mathématiques & sciences de la terre Sciences de la terre & géographie physique |
description |
peer reviewed The surface velocity field of Shirase Glacier, a fast-flowing East Antarctic outlet glacier, is determined from ERS synthetic aperture radar (SAR) images by means of speckle tracking using phase correlation, a technique which matches small image kernels of two complex SAR images by maximization of the local coherence. Velocity estimates are used to calculate surface strain rates, which are then used to calculate the large-scale, vertically integrated force balance and to determine the major stress components resisting the driving stress. For the whole glacier system, the driving stress is largely balanced by the basal drag, but with contributions from lateral drag up to 15% of the driving stress at the grounding line. Longitudinal stress gradients have only local importance to the balance of forces, limited to an area of a few square kilometers near the grounding line, where they resist the driving stress. In the grounded part of the glacier, >90% of the total ice velocity is due to basal sliding. Comparison with a balance-flux distribution of the Antarctic ice sheet suggests that the glacier in the downstream part of the Shirase drainage basin is close to equilibrium, showing a slight negative imbalance. |
author2 |
Vrij Universiteit Brussels CSL - Centre Spatial de Liège - ULiège |
format |
Article in Journal/Newspaper |
author |
Pattyn, Frank De Rauw, Dominique |
author_facet |
Pattyn, Frank De Rauw, Dominique |
author_sort |
Pattyn, Frank |
title |
Ice-dynamic conditions of Shirase Glacier, Antarctica, inferred from ERS SAR interferometry |
title_short |
Ice-dynamic conditions of Shirase Glacier, Antarctica, inferred from ERS SAR interferometry |
title_full |
Ice-dynamic conditions of Shirase Glacier, Antarctica, inferred from ERS SAR interferometry |
title_fullStr |
Ice-dynamic conditions of Shirase Glacier, Antarctica, inferred from ERS SAR interferometry |
title_full_unstemmed |
Ice-dynamic conditions of Shirase Glacier, Antarctica, inferred from ERS SAR interferometry |
title_sort |
ice-dynamic conditions of shirase glacier, antarctica, inferred from ers sar interferometry |
publisher |
Int Glaciol Soc |
publishDate |
2002 |
url |
https://orbi.uliege.be/handle/2268/143297 https://orbi.uliege.be/bitstream/2268/143297/1/Pattyn_Derauw2002_JGLAC.pdf https://doi.org/10.3189/172756502781831115 |
genre |
Antarc* Antarctic Antarctica Ice Sheet Journal of Glaciology Shirase Glacier |
genre_facet |
Antarc* Antarctic Antarctica Ice Sheet Journal of Glaciology Shirase Glacier |
op_source |
Journal of Glaciology, 48 (163), 559-565 (2002) |
op_relation |
http://homepages.ulb.ac.be/~fpattyn/papers/Pattyn_Derauw2002_JGLAC.pdf urn:issn:0022-1430 urn:issn:1727-5652 https://orbi.uliege.be/handle/2268/143297 info:hdl:2268/143297 https://orbi.uliege.be/bitstream/2268/143297/1/Pattyn_Derauw2002_JGLAC.pdf doi:10.3189/172756502781831115 scopus-id:2-s2.0-0038163642 |
op_rights |
open access http://purl.org/coar/access_right/c_abf2 info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.3189/172756502781831115 |
container_title |
Journal of Glaciology |
container_volume |
48 |
container_issue |
163 |
container_start_page |
559 |
op_container_end_page |
565 |
_version_ |
1796935721528852480 |