A subglacial water-flow model for West Antarctica.
The current generation of continental-scale ice-sheet models cannot successfully reproduce the complex ice/water/sediment interactions of the West Antarctic ice sheet (WAIS) in a physically meaningful manner. The potential of a thin-film-based subglacial water-flow model for incorporation into a con...
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International Glaciological Society
2009
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Online Access: | http://dro.dur.ac.uk/6811/ http://dro.dur.ac.uk/6811/1/6831.pdf https://doi.org/10.3189/002214309790152564 |
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ftunivdurham:oai:dro.dur.ac.uk.OAI2:6811 2023-05-15T14:04:18+02:00 A subglacial water-flow model for West Antarctica. Le Brocq, A.M. Payne, A.J. Siegert, M.J. Alley, R.A. 2009-12-01 application/pdf http://dro.dur.ac.uk/6811/ http://dro.dur.ac.uk/6811/1/6831.pdf https://doi.org/10.3189/002214309790152564 unknown International Glaciological Society dro:6811 issn:0022-1430 issn: 1727-5652 doi:10.3189/002214309790152564 http://dro.dur.ac.uk/6811/ http://dx.doi.org/10.3189/002214309790152564 http://dro.dur.ac.uk/6811/1/6831.pdf © 2009 International Glaciological Society Journal of glaciology, 2009, Vol.55(193), pp.879-888 [Peer Reviewed Journal] Article PeerReviewed 2009 ftunivdurham https://doi.org/10.3189/002214309790152564 2020-05-28T22:27:50Z The current generation of continental-scale ice-sheet models cannot successfully reproduce the complex ice/water/sediment interactions of the West Antarctic ice sheet (WAIS) in a physically meaningful manner. The potential of a thin-film-based subglacial water-flow model for incorporation into a continental-scale coupled ice/water flow model of the WAIS is evaluated in this paper. The subglacial water-flow model is applied to the Ross Sea sector of the WAIS, in both a steady-state and time-dependent form, to derive the equilibrium water depth for the present-day configuration. The potential for coupling the model to an ice-flow model is then demonstrated, using a variable sliding parameter that is a function of the subglacial water depth. A coupled ice/water flow model, using the parameterization tested in this paper, could have the potential for reproducing the surface elevation, velocity and thermal regime of the WAIS successfully. These requirements are crucial in modelling the evolution of the WAIS, and must be addressed before reliable continental-scale predictive models can be utilized. Article in Journal/Newspaper Antarc* Antarctic Antarctica Ice Sheet Journal of Glaciology Ross Sea West Antarctica Durham University: Durham Research Online Antarctic Ross Sea West Antarctic Ice Sheet West Antarctica Journal of Glaciology 55 193 879 888 |
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Open Polar |
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Durham University: Durham Research Online |
op_collection_id |
ftunivdurham |
language |
unknown |
description |
The current generation of continental-scale ice-sheet models cannot successfully reproduce the complex ice/water/sediment interactions of the West Antarctic ice sheet (WAIS) in a physically meaningful manner. The potential of a thin-film-based subglacial water-flow model for incorporation into a continental-scale coupled ice/water flow model of the WAIS is evaluated in this paper. The subglacial water-flow model is applied to the Ross Sea sector of the WAIS, in both a steady-state and time-dependent form, to derive the equilibrium water depth for the present-day configuration. The potential for coupling the model to an ice-flow model is then demonstrated, using a variable sliding parameter that is a function of the subglacial water depth. A coupled ice/water flow model, using the parameterization tested in this paper, could have the potential for reproducing the surface elevation, velocity and thermal regime of the WAIS successfully. These requirements are crucial in modelling the evolution of the WAIS, and must be addressed before reliable continental-scale predictive models can be utilized. |
format |
Article in Journal/Newspaper |
author |
Le Brocq, A.M. Payne, A.J. Siegert, M.J. Alley, R.A. |
spellingShingle |
Le Brocq, A.M. Payne, A.J. Siegert, M.J. Alley, R.A. A subglacial water-flow model for West Antarctica. |
author_facet |
Le Brocq, A.M. Payne, A.J. Siegert, M.J. Alley, R.A. |
author_sort |
Le Brocq, A.M. |
title |
A subglacial water-flow model for West Antarctica. |
title_short |
A subglacial water-flow model for West Antarctica. |
title_full |
A subglacial water-flow model for West Antarctica. |
title_fullStr |
A subglacial water-flow model for West Antarctica. |
title_full_unstemmed |
A subglacial water-flow model for West Antarctica. |
title_sort |
subglacial water-flow model for west antarctica. |
publisher |
International Glaciological Society |
publishDate |
2009 |
url |
http://dro.dur.ac.uk/6811/ http://dro.dur.ac.uk/6811/1/6831.pdf https://doi.org/10.3189/002214309790152564 |
geographic |
Antarctic Ross Sea West Antarctic Ice Sheet West Antarctica |
geographic_facet |
Antarctic Ross Sea West Antarctic Ice Sheet West Antarctica |
genre |
Antarc* Antarctic Antarctica Ice Sheet Journal of Glaciology Ross Sea West Antarctica |
genre_facet |
Antarc* Antarctic Antarctica Ice Sheet Journal of Glaciology Ross Sea West Antarctica |
op_source |
Journal of glaciology, 2009, Vol.55(193), pp.879-888 [Peer Reviewed Journal] |
op_relation |
dro:6811 issn:0022-1430 issn: 1727-5652 doi:10.3189/002214309790152564 http://dro.dur.ac.uk/6811/ http://dx.doi.org/10.3189/002214309790152564 http://dro.dur.ac.uk/6811/1/6831.pdf |
op_rights |
© 2009 International Glaciological Society |
op_doi |
https://doi.org/10.3189/002214309790152564 |
container_title |
Journal of Glaciology |
container_volume |
55 |
container_issue |
193 |
container_start_page |
879 |
op_container_end_page |
888 |
_version_ |
1766275329261830144 |