Determining Ice-Sheet Uplift Surrounding Subglacial Lakes with a Viscous Plate Model
We develop a viscous model of plate bending suitable for studying ice-sheet flexure due to subglacial lake filling and draining, and apply this model to determine the area of ice-sheet uplift surrounding a subglacial lake. The choice of a viscous model reflects our interest in Antarctic subglacial l...
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ftdoajarticles:oai:doaj.org/article:609c109adb124c4ca4a2730c1cf82116 2023-05-15T13:58:51+02:00 Determining Ice-Sheet Uplift Surrounding Subglacial Lakes with a Viscous Plate Model Ryan T. Walker Mauro A. Werder Christine F. Dow Sophie M. J. Nowicki 2017-12-01T00:00:00Z https://doi.org/10.3389/feart.2017.00103 https://doaj.org/article/609c109adb124c4ca4a2730c1cf82116 EN eng Frontiers Media S.A. http://journal.frontiersin.org/article/10.3389/feart.2017.00103/full https://doaj.org/toc/2296-6463 2296-6463 doi:10.3389/feart.2017.00103 https://doaj.org/article/609c109adb124c4ca4a2730c1cf82116 Frontiers in Earth Science, Vol 5 (2017) subglacial lakes hydrology ice sheets obstacle problem viscous plate Science Q article 2017 ftdoajarticles https://doi.org/10.3389/feart.2017.00103 2022-12-30T22:46:46Z We develop a viscous model of plate bending suitable for studying ice-sheet flexure due to subglacial lake filling and draining, and apply this model to determine the area of ice-sheet uplift surrounding a subglacial lake. The choice of a viscous model reflects our interest in Antarctic subglacial lakes, which can fill and drain on time scales of months to decades. Experiments with idealized lake shapes show that the size of the uplift area relative to lake area depends on subglacial water pressure and ice-sheet thickness, with the viscous material parameters scaling the magnitude of uplift rate within this area. The water pressure therefore has a strong control on the evolution of the lake shape and related subglacial hydrological development, but is not yet well constrained by observations. Due to the likelihood that ice flexure will affect subglacial lake filling and draining, we suggest that the insights of this study should be applied to development of a realistic ice sheet-hydrological coupled model. Article in Journal/Newspaper Antarc* Antarctic Ice Sheet Directory of Open Access Journals: DOAJ Articles Antarctic Frontiers in Earth Science 5 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
subglacial lakes hydrology ice sheets obstacle problem viscous plate Science Q |
spellingShingle |
subglacial lakes hydrology ice sheets obstacle problem viscous plate Science Q Ryan T. Walker Mauro A. Werder Christine F. Dow Sophie M. J. Nowicki Determining Ice-Sheet Uplift Surrounding Subglacial Lakes with a Viscous Plate Model |
topic_facet |
subglacial lakes hydrology ice sheets obstacle problem viscous plate Science Q |
description |
We develop a viscous model of plate bending suitable for studying ice-sheet flexure due to subglacial lake filling and draining, and apply this model to determine the area of ice-sheet uplift surrounding a subglacial lake. The choice of a viscous model reflects our interest in Antarctic subglacial lakes, which can fill and drain on time scales of months to decades. Experiments with idealized lake shapes show that the size of the uplift area relative to lake area depends on subglacial water pressure and ice-sheet thickness, with the viscous material parameters scaling the magnitude of uplift rate within this area. The water pressure therefore has a strong control on the evolution of the lake shape and related subglacial hydrological development, but is not yet well constrained by observations. Due to the likelihood that ice flexure will affect subglacial lake filling and draining, we suggest that the insights of this study should be applied to development of a realistic ice sheet-hydrological coupled model. |
format |
Article in Journal/Newspaper |
author |
Ryan T. Walker Mauro A. Werder Christine F. Dow Sophie M. J. Nowicki |
author_facet |
Ryan T. Walker Mauro A. Werder Christine F. Dow Sophie M. J. Nowicki |
author_sort |
Ryan T. Walker |
title |
Determining Ice-Sheet Uplift Surrounding Subglacial Lakes with a Viscous Plate Model |
title_short |
Determining Ice-Sheet Uplift Surrounding Subglacial Lakes with a Viscous Plate Model |
title_full |
Determining Ice-Sheet Uplift Surrounding Subglacial Lakes with a Viscous Plate Model |
title_fullStr |
Determining Ice-Sheet Uplift Surrounding Subglacial Lakes with a Viscous Plate Model |
title_full_unstemmed |
Determining Ice-Sheet Uplift Surrounding Subglacial Lakes with a Viscous Plate Model |
title_sort |
determining ice-sheet uplift surrounding subglacial lakes with a viscous plate model |
publisher |
Frontiers Media S.A. |
publishDate |
2017 |
url |
https://doi.org/10.3389/feart.2017.00103 https://doaj.org/article/609c109adb124c4ca4a2730c1cf82116 |
geographic |
Antarctic |
geographic_facet |
Antarctic |
genre |
Antarc* Antarctic Ice Sheet |
genre_facet |
Antarc* Antarctic Ice Sheet |
op_source |
Frontiers in Earth Science, Vol 5 (2017) |
op_relation |
http://journal.frontiersin.org/article/10.3389/feart.2017.00103/full https://doaj.org/toc/2296-6463 2296-6463 doi:10.3389/feart.2017.00103 https://doaj.org/article/609c109adb124c4ca4a2730c1cf82116 |
op_doi |
https://doi.org/10.3389/feart.2017.00103 |
container_title |
Frontiers in Earth Science |
container_volume |
5 |
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1766267213213335552 |