Sensitivity analysis of ice motion near Adams Island
The time-averaged motion of shore-fast ice near a small Arctic island is analysed through the solution of the momentum equation for the ice cover using the Galerkin finite element method coupled with an adjoint sensitivity formulation. A linear-viscous rheology is used. Shore boundaries were modeled...
Published in: | Canadian Geotechnical Journal |
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Language: | English |
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Canadian Science Publishing
1992
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Online Access: | http://dx.doi.org/10.1139/t92-101 http://www.nrcresearchpress.com/doi/pdf/10.1139/t92-101 |
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crcansciencepubl:10.1139/t92-101 2023-12-17T10:17:38+01:00 Sensitivity analysis of ice motion near Adams Island Sykes, J. F. Miller-Cushon, J. D. 1992 http://dx.doi.org/10.1139/t92-101 http://www.nrcresearchpress.com/doi/pdf/10.1139/t92-101 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Geotechnical Journal volume 29, issue 6, page 890-901 ISSN 0008-3674 1208-6010 Civil and Structural Engineering Geotechnical Engineering and Engineering Geology journal-article 1992 crcansciencepubl https://doi.org/10.1139/t92-101 2023-11-19T13:39:29Z The time-averaged motion of shore-fast ice near a small Arctic island is analysed through the solution of the momentum equation for the ice cover using the Galerkin finite element method coupled with an adjoint sensitivity formulation. A linear-viscous rheology is used. Shore boundaries were modeled by prescribing ice velocity components such that the ice velocity vectors at shore boundaries were directed towards the ice cover, normal to the shoreline. A sensitivity analysis using the adjoint methodology showed that the velocity of the ice near the island is strongly influenced by the magnitude of the prescribed boundary velocities. The surface shear stresses from wind and ocean currents and the ice viscosities over part of the modeled domain also have a significant influence. The influence of Coriolis acceleration and the mass of the ice are not significant. Key words : ice mechanics, momentum, viscous rheology, finite elements. Article in Journal/Newspaper Adams Island Arctic Canadian Science Publishing (via Crossref) Arctic Arctic Island ENVELOPE(-74.766,-74.766,62.234,62.234) Adams Island ENVELOPE(92.550,92.550,-66.550,-66.550) Canadian Geotechnical Journal 29 6 890 901 |
institution |
Open Polar |
collection |
Canadian Science Publishing (via Crossref) |
op_collection_id |
crcansciencepubl |
language |
English |
topic |
Civil and Structural Engineering Geotechnical Engineering and Engineering Geology |
spellingShingle |
Civil and Structural Engineering Geotechnical Engineering and Engineering Geology Sykes, J. F. Miller-Cushon, J. D. Sensitivity analysis of ice motion near Adams Island |
topic_facet |
Civil and Structural Engineering Geotechnical Engineering and Engineering Geology |
description |
The time-averaged motion of shore-fast ice near a small Arctic island is analysed through the solution of the momentum equation for the ice cover using the Galerkin finite element method coupled with an adjoint sensitivity formulation. A linear-viscous rheology is used. Shore boundaries were modeled by prescribing ice velocity components such that the ice velocity vectors at shore boundaries were directed towards the ice cover, normal to the shoreline. A sensitivity analysis using the adjoint methodology showed that the velocity of the ice near the island is strongly influenced by the magnitude of the prescribed boundary velocities. The surface shear stresses from wind and ocean currents and the ice viscosities over part of the modeled domain also have a significant influence. The influence of Coriolis acceleration and the mass of the ice are not significant. Key words : ice mechanics, momentum, viscous rheology, finite elements. |
format |
Article in Journal/Newspaper |
author |
Sykes, J. F. Miller-Cushon, J. D. |
author_facet |
Sykes, J. F. Miller-Cushon, J. D. |
author_sort |
Sykes, J. F. |
title |
Sensitivity analysis of ice motion near Adams Island |
title_short |
Sensitivity analysis of ice motion near Adams Island |
title_full |
Sensitivity analysis of ice motion near Adams Island |
title_fullStr |
Sensitivity analysis of ice motion near Adams Island |
title_full_unstemmed |
Sensitivity analysis of ice motion near Adams Island |
title_sort |
sensitivity analysis of ice motion near adams island |
publisher |
Canadian Science Publishing |
publishDate |
1992 |
url |
http://dx.doi.org/10.1139/t92-101 http://www.nrcresearchpress.com/doi/pdf/10.1139/t92-101 |
long_lat |
ENVELOPE(-74.766,-74.766,62.234,62.234) ENVELOPE(92.550,92.550,-66.550,-66.550) |
geographic |
Arctic Arctic Island Adams Island |
geographic_facet |
Arctic Arctic Island Adams Island |
genre |
Adams Island Arctic |
genre_facet |
Adams Island Arctic |
op_source |
Canadian Geotechnical Journal volume 29, issue 6, page 890-901 ISSN 0008-3674 1208-6010 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/t92-101 |
container_title |
Canadian Geotechnical Journal |
container_volume |
29 |
container_issue |
6 |
container_start_page |
890 |
op_container_end_page |
901 |
_version_ |
1785582036593934336 |