A balanced water layer concept for subglacial hydrology in large-scale ice sheet models
There is currently no doubt about the existence of a widespread hydrological network under the Antarctic Ice Sheet, which lubricates the ice base and thus leads to increased ice velocities. Consequently, ice models should incorporate basal hydrology to obtain meaningful results for future ice dynami...
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00022315 2023-05-15T13:41:01+02:00 A balanced water layer concept for subglacial hydrology in large-scale ice sheet models Goeller, S. Thoma, M. Grosfeld, K. Miller, H. 2013-07 electronic https://doi.org/10.5194/tc-7-1095-2013 https://noa.gwlb.de/receive/cop_mods_00022315 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00022270/tc-7-1095-2013.pdf https://tc.copernicus.org/articles/7/1095/2013/tc-7-1095-2013.pdf eng eng Copernicus Publications The Cryosphere -- ˜Theœ Cryosphere -- http://www.bibliothek.uni-regensburg.de/ezeit/?2393169 -- http://www.the-cryosphere.net/ -- 1994-0424 https://doi.org/10.5194/tc-7-1095-2013 https://noa.gwlb.de/receive/cop_mods_00022315 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00022270/tc-7-1095-2013.pdf https://tc.copernicus.org/articles/7/1095/2013/tc-7-1095-2013.pdf uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2013 ftnonlinearchiv https://doi.org/10.5194/tc-7-1095-2013 2022-02-08T22:51:10Z There is currently no doubt about the existence of a widespread hydrological network under the Antarctic Ice Sheet, which lubricates the ice base and thus leads to increased ice velocities. Consequently, ice models should incorporate basal hydrology to obtain meaningful results for future ice dynamics and their contribution to global sea level rise. Here, we introduce the balanced water layer concept, covering two prominent subglacial hydrological features for ice sheet modeling on a continental scale: the evolution of subglacial lakes and balance water fluxes. We couple it to the thermomechanical ice-flow model RIMBAY and apply it to a synthetic model domain. In our experiments we demonstrate the dynamic generation of subglacial lakes and their impact on the velocity field of the overlaying ice sheet, resulting in a negative ice mass balance. Furthermore, we introduce an elementary parametrization of the water flux–basal sliding coupling and reveal the predominance of the ice loss through the resulting ice streams against the stabilizing influence of less hydrologically active areas. We point out that established balance flux schemes quantify these effects only partially as their ability to store subglacial water is lacking. Article in Journal/Newspaper Antarc* Antarctic Ice Sheet The Cryosphere Niedersächsisches Online-Archiv NOA Antarctic The Antarctic The Cryosphere 7 4 1095 1106 |
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Niedersächsisches Online-Archiv NOA |
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language |
English |
topic |
article Verlagsveröffentlichung |
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article Verlagsveröffentlichung Goeller, S. Thoma, M. Grosfeld, K. Miller, H. A balanced water layer concept for subglacial hydrology in large-scale ice sheet models |
topic_facet |
article Verlagsveröffentlichung |
description |
There is currently no doubt about the existence of a widespread hydrological network under the Antarctic Ice Sheet, which lubricates the ice base and thus leads to increased ice velocities. Consequently, ice models should incorporate basal hydrology to obtain meaningful results for future ice dynamics and their contribution to global sea level rise. Here, we introduce the balanced water layer concept, covering two prominent subglacial hydrological features for ice sheet modeling on a continental scale: the evolution of subglacial lakes and balance water fluxes. We couple it to the thermomechanical ice-flow model RIMBAY and apply it to a synthetic model domain. In our experiments we demonstrate the dynamic generation of subglacial lakes and their impact on the velocity field of the overlaying ice sheet, resulting in a negative ice mass balance. Furthermore, we introduce an elementary parametrization of the water flux–basal sliding coupling and reveal the predominance of the ice loss through the resulting ice streams against the stabilizing influence of less hydrologically active areas. We point out that established balance flux schemes quantify these effects only partially as their ability to store subglacial water is lacking. |
format |
Article in Journal/Newspaper |
author |
Goeller, S. Thoma, M. Grosfeld, K. Miller, H. |
author_facet |
Goeller, S. Thoma, M. Grosfeld, K. Miller, H. |
author_sort |
Goeller, S. |
title |
A balanced water layer concept for subglacial hydrology in large-scale ice sheet models |
title_short |
A balanced water layer concept for subglacial hydrology in large-scale ice sheet models |
title_full |
A balanced water layer concept for subglacial hydrology in large-scale ice sheet models |
title_fullStr |
A balanced water layer concept for subglacial hydrology in large-scale ice sheet models |
title_full_unstemmed |
A balanced water layer concept for subglacial hydrology in large-scale ice sheet models |
title_sort |
balanced water layer concept for subglacial hydrology in large-scale ice sheet models |
publisher |
Copernicus Publications |
publishDate |
2013 |
url |
https://doi.org/10.5194/tc-7-1095-2013 https://noa.gwlb.de/receive/cop_mods_00022315 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00022270/tc-7-1095-2013.pdf https://tc.copernicus.org/articles/7/1095/2013/tc-7-1095-2013.pdf |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic Ice Sheet The Cryosphere |
genre_facet |
Antarc* Antarctic Ice Sheet The Cryosphere |
op_relation |
The Cryosphere -- ˜Theœ Cryosphere -- http://www.bibliothek.uni-regensburg.de/ezeit/?2393169 -- http://www.the-cryosphere.net/ -- 1994-0424 https://doi.org/10.5194/tc-7-1095-2013 https://noa.gwlb.de/receive/cop_mods_00022315 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00022270/tc-7-1095-2013.pdf https://tc.copernicus.org/articles/7/1095/2013/tc-7-1095-2013.pdf |
op_rights |
uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/tc-7-1095-2013 |
container_title |
The Cryosphere |
container_volume |
7 |
container_issue |
4 |
container_start_page |
1095 |
op_container_end_page |
1106 |
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1766144701341106176 |