Tidal Grounding-Line Migration Modulated by Subglacial Hydrology ...
AbstractWe present a mathematical model of the hydrology of grounding‐line migration on tidal timescales, in which the ice acts elastically, overlying a connected hydrological network, with the ocean tides modeled by an oscillating far‐field fluid height. The upstream grounding‐line migration is dri...
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ftdatacite:10.17863/cam.56758 2024-02-04T09:55:33+01:00 Tidal Grounding-Line Migration Modulated by Subglacial Hydrology ... Warburton, KLP Hewitt, DR Neufeld, JA 2020 https://dx.doi.org/10.17863/cam.56758 https://www.repository.cam.ac.uk/handle/1810/309663 en eng American Geophysical Union (AGU) https://doi.org/10.17863/CAM.56685 open.access All rights reserved http://purl.org/coar/access_right/c_abf2 37 Earth Sciences 3709 Physical Geography and Environmental Geoscience 3705 Geology 13 Climate Action Article ScholarlyArticle JournalArticle article-journal 2020 ftdatacite https://doi.org/10.17863/cam.56758 2024-01-05T15:37:18Z AbstractWe present a mathematical model of the hydrology of grounding‐line migration on tidal timescales, in which the ice acts elastically, overlying a connected hydrological network, with the ocean tides modeled by an oscillating far‐field fluid height. The upstream grounding‐line migration is driven by a fluid pressure gradient through the grounding zone, while the downstream migration is limited by fluid drainage through the till. The two processes are described using separate travelling‐wave solutions, based on a model of fluid flow under an elastic sheet. The asymmetry between the upstream and downstream motion allows the grounding line to act as a nonlinear filter on the tidal forcing as the pressure signal propagates upstream, and this frequency modulation is discussed in the context of velocity data from ice streams across Antarctica to provide a novel constraint on till permeability. ... Article in Journal/Newspaper Antarc* Antarctica DataCite Metadata Store (German National Library of Science and Technology) |
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Open Polar |
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DataCite Metadata Store (German National Library of Science and Technology) |
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ftdatacite |
language |
English |
topic |
37 Earth Sciences 3709 Physical Geography and Environmental Geoscience 3705 Geology 13 Climate Action |
spellingShingle |
37 Earth Sciences 3709 Physical Geography and Environmental Geoscience 3705 Geology 13 Climate Action Warburton, KLP Hewitt, DR Neufeld, JA Tidal Grounding-Line Migration Modulated by Subglacial Hydrology ... |
topic_facet |
37 Earth Sciences 3709 Physical Geography and Environmental Geoscience 3705 Geology 13 Climate Action |
description |
AbstractWe present a mathematical model of the hydrology of grounding‐line migration on tidal timescales, in which the ice acts elastically, overlying a connected hydrological network, with the ocean tides modeled by an oscillating far‐field fluid height. The upstream grounding‐line migration is driven by a fluid pressure gradient through the grounding zone, while the downstream migration is limited by fluid drainage through the till. The two processes are described using separate travelling‐wave solutions, based on a model of fluid flow under an elastic sheet. The asymmetry between the upstream and downstream motion allows the grounding line to act as a nonlinear filter on the tidal forcing as the pressure signal propagates upstream, and this frequency modulation is discussed in the context of velocity data from ice streams across Antarctica to provide a novel constraint on till permeability. ... |
format |
Article in Journal/Newspaper |
author |
Warburton, KLP Hewitt, DR Neufeld, JA |
author_facet |
Warburton, KLP Hewitt, DR Neufeld, JA |
author_sort |
Warburton, KLP |
title |
Tidal Grounding-Line Migration Modulated by Subglacial Hydrology ... |
title_short |
Tidal Grounding-Line Migration Modulated by Subglacial Hydrology ... |
title_full |
Tidal Grounding-Line Migration Modulated by Subglacial Hydrology ... |
title_fullStr |
Tidal Grounding-Line Migration Modulated by Subglacial Hydrology ... |
title_full_unstemmed |
Tidal Grounding-Line Migration Modulated by Subglacial Hydrology ... |
title_sort |
tidal grounding-line migration modulated by subglacial hydrology ... |
publisher |
American Geophysical Union (AGU) |
publishDate |
2020 |
url |
https://dx.doi.org/10.17863/cam.56758 https://www.repository.cam.ac.uk/handle/1810/309663 |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_relation |
https://doi.org/10.17863/CAM.56685 |
op_rights |
open.access All rights reserved http://purl.org/coar/access_right/c_abf2 |
op_doi |
https://doi.org/10.17863/cam.56758 |
_version_ |
1789959577152782336 |