A fully three-dimensional finite-element model applied to velocities on Storglaciären, Sweden
Abstract A finite-element model that solves the stress-balance equations for glacier dynamics in three dimensions has been developed by extending previous flow-plane models. This model retains all terms of the stress tensor and uses a Glen-type power law for viscosity calculations. In the paper, the...
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Cambridge University Press (CUP)
1995
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Online Access: | http://dx.doi.org/10.1017/s0022143000017792 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000017792 |
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crcambridgeupr:10.1017/s0022143000017792 2024-03-03T08:46:07+00:00 A fully three-dimensional finite-element model applied to velocities on Storglaciären, Sweden Hanson, Brian 1995 http://dx.doi.org/10.1017/s0022143000017792 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000017792 en eng Cambridge University Press (CUP) Journal of Glaciology volume 41, issue 137, page 91-102 ISSN 0022-1430 1727-5652 Earth-Surface Processes journal-article 1995 crcambridgeupr https://doi.org/10.1017/s0022143000017792 2024-02-08T08:38:15Z Abstract A finite-element model that solves the stress-balance equations for glacier dynamics in three dimensions has been developed by extending previous flow-plane models. This model retains all terms of the stress tensor and uses a Glen-type power law for viscosity calculations. In the paper, the model is applied to Storglaciären, Sweden, to explore both the glacier’s dynamics and the model’s characteristics. Values of the stiffness parameter B of 0.20–0.22 MPa year 1/n were required to match observed strain rates on Storglaciären. Overall velocities required imposition of a problematically small sliding speed. Stress fields implied by the model simulation showed that the glacier receives its largest driving force from a high-slope zone near the equilibrium line, and that a large proportion of the resistive stress comes from lateral drag. Lateral drag is enhanced on this glacier by being frozen to its sidewalls and by a turning of the main flow as it comes out of the main, or northern, cirque. Article in Journal/Newspaper Journal of Glaciology Cambridge University Press Storglaciären ENVELOPE(18.560,18.560,67.904,67.904) Journal of Glaciology 41 137 91 102 |
institution |
Open Polar |
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Cambridge University Press |
op_collection_id |
crcambridgeupr |
language |
English |
topic |
Earth-Surface Processes |
spellingShingle |
Earth-Surface Processes Hanson, Brian A fully three-dimensional finite-element model applied to velocities on Storglaciären, Sweden |
topic_facet |
Earth-Surface Processes |
description |
Abstract A finite-element model that solves the stress-balance equations for glacier dynamics in three dimensions has been developed by extending previous flow-plane models. This model retains all terms of the stress tensor and uses a Glen-type power law for viscosity calculations. In the paper, the model is applied to Storglaciären, Sweden, to explore both the glacier’s dynamics and the model’s characteristics. Values of the stiffness parameter B of 0.20–0.22 MPa year 1/n were required to match observed strain rates on Storglaciären. Overall velocities required imposition of a problematically small sliding speed. Stress fields implied by the model simulation showed that the glacier receives its largest driving force from a high-slope zone near the equilibrium line, and that a large proportion of the resistive stress comes from lateral drag. Lateral drag is enhanced on this glacier by being frozen to its sidewalls and by a turning of the main flow as it comes out of the main, or northern, cirque. |
format |
Article in Journal/Newspaper |
author |
Hanson, Brian |
author_facet |
Hanson, Brian |
author_sort |
Hanson, Brian |
title |
A fully three-dimensional finite-element model applied to velocities on Storglaciären, Sweden |
title_short |
A fully three-dimensional finite-element model applied to velocities on Storglaciären, Sweden |
title_full |
A fully three-dimensional finite-element model applied to velocities on Storglaciären, Sweden |
title_fullStr |
A fully three-dimensional finite-element model applied to velocities on Storglaciären, Sweden |
title_full_unstemmed |
A fully three-dimensional finite-element model applied to velocities on Storglaciären, Sweden |
title_sort |
fully three-dimensional finite-element model applied to velocities on storglaciären, sweden |
publisher |
Cambridge University Press (CUP) |
publishDate |
1995 |
url |
http://dx.doi.org/10.1017/s0022143000017792 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0022143000017792 |
long_lat |
ENVELOPE(18.560,18.560,67.904,67.904) |
geographic |
Storglaciären |
geographic_facet |
Storglaciären |
genre |
Journal of Glaciology |
genre_facet |
Journal of Glaciology |
op_source |
Journal of Glaciology volume 41, issue 137, page 91-102 ISSN 0022-1430 1727-5652 |
op_doi |
https://doi.org/10.1017/s0022143000017792 |
container_title |
Journal of Glaciology |
container_volume |
41 |
container_issue |
137 |
container_start_page |
91 |
op_container_end_page |
102 |
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1792502040462622720 |