Seasonal acceleration of inland ice via along-flow coupling to marginal ice
We use an ice-flow model to demonstrate how flow variations initiated in the marginal zone of an ice sheet affect flow farther inland through longitudinal (along-flow) coupling. Our findings allow for an alternate interpretation of seasonal accelerations observed near the equilibrium line of the Gre...
Published in: | Journal of Glaciology |
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2008
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Online Access: | https://hdl.handle.net/1983/b4d92685-a9c3-4612-bf64-a0f01710fb59 https://research-information.bris.ac.uk/en/publications/b4d92685-a9c3-4612-bf64-a0f01710fb59 https://doi.org/10.3189/002214308784886117 |
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ftubristolcris:oai:research-information.bris.ac.uk:publications/b4d92685-a9c3-4612-bf64-a0f01710fb59 2024-01-28T10:06:09+01:00 Seasonal acceleration of inland ice via along-flow coupling to marginal ice S.F., Price Payne, AJ G.A., Catania T.A., Neumann 2008 https://hdl.handle.net/1983/b4d92685-a9c3-4612-bf64-a0f01710fb59 https://research-information.bris.ac.uk/en/publications/b4d92685-a9c3-4612-bf64-a0f01710fb59 https://doi.org/10.3189/002214308784886117 eng eng info:eu-repo/semantics/restrictedAccess S.F. , P , Payne , AJ , G.A. , C & T.A. , N 2008 , ' Seasonal acceleration of inland ice via along-flow coupling to marginal ice ' , Journal of Glaciology , vol. 54 , pp. 213 - 219 . https://doi.org/10.3189/002214308784886117 article 2008 ftubristolcris https://doi.org/10.3189/002214308784886117 2024-01-04T23:32:40Z We use an ice-flow model to demonstrate how flow variations initiated in the marginal zone of an ice sheet affect flow farther inland through longitudinal (along-flow) coupling. Our findings allow for an alternate interpretation of seasonal accelerations observed near the equilibrium line of the Greenland ice sheet (Zwally and others, 2002). We demonstrate that these observations can be explained by accelerations initiated up to 12 km closer to the margin where the ice is ∼40% thinner, is heavily crevassed, experiences a seasonal doubling of velocity, and where the ablation rate, surface meltwater flux and ice temperature are likely higher. Our modeling and observations suggest that conditions and processes normally found near ice-sheet margins are adequate for explaining the observations of Zwally and others (2002). This and considerations of the likely subglacial hydrology in the marginal zone lead us to suggest that seasonal accelerations may have limited impact on ice-sheet mass balance even in the face of climate warming. We use an ice-flow model to demonstrate how flow variations initiated in the marginal zone of an ice sheet affect flow farther inland through longitudinal (along-flow) coupling. Our findings allow for an alternate interpretation of seasonal accelerations observed near the equilibrium line of the Greenland ice sheet (Zwally and others, 2002). We demonstrate that these observations can be explained by accelerations initiated up to 12 km closer to the margin where the ice is ∼40% thinner, is heavily crevassed, experiences a seasonal doubling of velocity, and where the ablation rate, surface meltwater flux and ice temperature are likely higher. Our modeling and observations suggest that conditions and processes normally found near ice-sheet margins are adequate for explaining the observations of Zwally and others (2002). This and considerations of the likely subglacial hydrology in the marginal zone lead us to suggest that seasonal accelerations may have limited impact on ice-sheet mass ... Article in Journal/Newspaper Greenland Ice Sheet Journal of Glaciology University of Bristol: Bristol Research Greenland Journal of Glaciology 54 185 213 219 |
institution |
Open Polar |
collection |
University of Bristol: Bristol Research |
op_collection_id |
ftubristolcris |
language |
English |
description |
We use an ice-flow model to demonstrate how flow variations initiated in the marginal zone of an ice sheet affect flow farther inland through longitudinal (along-flow) coupling. Our findings allow for an alternate interpretation of seasonal accelerations observed near the equilibrium line of the Greenland ice sheet (Zwally and others, 2002). We demonstrate that these observations can be explained by accelerations initiated up to 12 km closer to the margin where the ice is ∼40% thinner, is heavily crevassed, experiences a seasonal doubling of velocity, and where the ablation rate, surface meltwater flux and ice temperature are likely higher. Our modeling and observations suggest that conditions and processes normally found near ice-sheet margins are adequate for explaining the observations of Zwally and others (2002). This and considerations of the likely subglacial hydrology in the marginal zone lead us to suggest that seasonal accelerations may have limited impact on ice-sheet mass balance even in the face of climate warming. We use an ice-flow model to demonstrate how flow variations initiated in the marginal zone of an ice sheet affect flow farther inland through longitudinal (along-flow) coupling. Our findings allow for an alternate interpretation of seasonal accelerations observed near the equilibrium line of the Greenland ice sheet (Zwally and others, 2002). We demonstrate that these observations can be explained by accelerations initiated up to 12 km closer to the margin where the ice is ∼40% thinner, is heavily crevassed, experiences a seasonal doubling of velocity, and where the ablation rate, surface meltwater flux and ice temperature are likely higher. Our modeling and observations suggest that conditions and processes normally found near ice-sheet margins are adequate for explaining the observations of Zwally and others (2002). This and considerations of the likely subglacial hydrology in the marginal zone lead us to suggest that seasonal accelerations may have limited impact on ice-sheet mass ... |
format |
Article in Journal/Newspaper |
author |
S.F., Price Payne, AJ G.A., Catania T.A., Neumann |
spellingShingle |
S.F., Price Payne, AJ G.A., Catania T.A., Neumann Seasonal acceleration of inland ice via along-flow coupling to marginal ice |
author_facet |
S.F., Price Payne, AJ G.A., Catania T.A., Neumann |
author_sort |
S.F., Price |
title |
Seasonal acceleration of inland ice via along-flow coupling to marginal ice |
title_short |
Seasonal acceleration of inland ice via along-flow coupling to marginal ice |
title_full |
Seasonal acceleration of inland ice via along-flow coupling to marginal ice |
title_fullStr |
Seasonal acceleration of inland ice via along-flow coupling to marginal ice |
title_full_unstemmed |
Seasonal acceleration of inland ice via along-flow coupling to marginal ice |
title_sort |
seasonal acceleration of inland ice via along-flow coupling to marginal ice |
publishDate |
2008 |
url |
https://hdl.handle.net/1983/b4d92685-a9c3-4612-bf64-a0f01710fb59 https://research-information.bris.ac.uk/en/publications/b4d92685-a9c3-4612-bf64-a0f01710fb59 https://doi.org/10.3189/002214308784886117 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Ice Sheet Journal of Glaciology |
genre_facet |
Greenland Ice Sheet Journal of Glaciology |
op_source |
S.F. , P , Payne , AJ , G.A. , C & T.A. , N 2008 , ' Seasonal acceleration of inland ice via along-flow coupling to marginal ice ' , Journal of Glaciology , vol. 54 , pp. 213 - 219 . https://doi.org/10.3189/002214308784886117 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.3189/002214308784886117 |
container_title |
Journal of Glaciology |
container_volume |
54 |
container_issue |
185 |
container_start_page |
213 |
op_container_end_page |
219 |
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1789332853032484864 |