Greenland subglacial drainage evolution regulated by weakly connected regions of the bed
Abstract Penetration of surface meltwater to the bed of the Greenland Ice Sheet each summer causes an initial increase in ice speed due to elevated basal water pressure, followed by slowdown in late summer that continues into fall and winter. While this seasonal pattern is commonly explained by an e...
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Online Access: | http://dx.doi.org/10.1038/ncomms13903 http://www.nature.com/articles/ncomms13903.pdf http://www.nature.com/articles/ncomms13903 |
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crspringernat:10.1038/ncomms13903 2023-05-15T16:27:28+02:00 Greenland subglacial drainage evolution regulated by weakly connected regions of the bed Hoffman, Matthew J. Andrews, Lauren C. Price, Stephen F. Catania, Ginny A. Neumann, Thomas A. Lüthi, Martin P. Gulley, Jason Ryser, Claudia Hawley, Robert L. Morriss, Blaine 2016 http://dx.doi.org/10.1038/ncomms13903 http://www.nature.com/articles/ncomms13903.pdf http://www.nature.com/articles/ncomms13903 en eng Springer Science and Business Media LLC https://creativecommons.org/licenses/by/4.0 https://creativecommons.org/licenses/by/4.0 CC-BY Nature Communications volume 7, issue 1 ISSN 2041-1723 General Physics and Astronomy General Biochemistry, Genetics and Molecular Biology General Chemistry journal-article 2016 crspringernat https://doi.org/10.1038/ncomms13903 2022-01-04T14:13:02Z Abstract Penetration of surface meltwater to the bed of the Greenland Ice Sheet each summer causes an initial increase in ice speed due to elevated basal water pressure, followed by slowdown in late summer that continues into fall and winter. While this seasonal pattern is commonly explained by an evolution of the subglacial drainage system from an inefficient distributed to efficient channelized configuration, mounting evidence indicates that subglacial channels are unable to explain important aspects of hydrodynamic coupling in late summer and fall. Here we use numerical models of subglacial drainage and ice flow to show that limited, gradual leakage of water and lowering of water pressure in weakly connected regions of the bed can explain the dominant features in late and post melt season ice dynamics. These results suggest that a third weakly connected drainage component should be included in the conceptual model of subglacial hydrology. Article in Journal/Newspaper Greenland Ice Sheet Springer Nature (via Crossref) Greenland Nature Communications 7 1 |
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Open Polar |
collection |
Springer Nature (via Crossref) |
op_collection_id |
crspringernat |
language |
English |
topic |
General Physics and Astronomy General Biochemistry, Genetics and Molecular Biology General Chemistry |
spellingShingle |
General Physics and Astronomy General Biochemistry, Genetics and Molecular Biology General Chemistry Hoffman, Matthew J. Andrews, Lauren C. Price, Stephen F. Catania, Ginny A. Neumann, Thomas A. Lüthi, Martin P. Gulley, Jason Ryser, Claudia Hawley, Robert L. Morriss, Blaine Greenland subglacial drainage evolution regulated by weakly connected regions of the bed |
topic_facet |
General Physics and Astronomy General Biochemistry, Genetics and Molecular Biology General Chemistry |
description |
Abstract Penetration of surface meltwater to the bed of the Greenland Ice Sheet each summer causes an initial increase in ice speed due to elevated basal water pressure, followed by slowdown in late summer that continues into fall and winter. While this seasonal pattern is commonly explained by an evolution of the subglacial drainage system from an inefficient distributed to efficient channelized configuration, mounting evidence indicates that subglacial channels are unable to explain important aspects of hydrodynamic coupling in late summer and fall. Here we use numerical models of subglacial drainage and ice flow to show that limited, gradual leakage of water and lowering of water pressure in weakly connected regions of the bed can explain the dominant features in late and post melt season ice dynamics. These results suggest that a third weakly connected drainage component should be included in the conceptual model of subglacial hydrology. |
format |
Article in Journal/Newspaper |
author |
Hoffman, Matthew J. Andrews, Lauren C. Price, Stephen F. Catania, Ginny A. Neumann, Thomas A. Lüthi, Martin P. Gulley, Jason Ryser, Claudia Hawley, Robert L. Morriss, Blaine |
author_facet |
Hoffman, Matthew J. Andrews, Lauren C. Price, Stephen F. Catania, Ginny A. Neumann, Thomas A. Lüthi, Martin P. Gulley, Jason Ryser, Claudia Hawley, Robert L. Morriss, Blaine |
author_sort |
Hoffman, Matthew J. |
title |
Greenland subglacial drainage evolution regulated by weakly connected regions of the bed |
title_short |
Greenland subglacial drainage evolution regulated by weakly connected regions of the bed |
title_full |
Greenland subglacial drainage evolution regulated by weakly connected regions of the bed |
title_fullStr |
Greenland subglacial drainage evolution regulated by weakly connected regions of the bed |
title_full_unstemmed |
Greenland subglacial drainage evolution regulated by weakly connected regions of the bed |
title_sort |
greenland subglacial drainage evolution regulated by weakly connected regions of the bed |
publisher |
Springer Science and Business Media LLC |
publishDate |
2016 |
url |
http://dx.doi.org/10.1038/ncomms13903 http://www.nature.com/articles/ncomms13903.pdf http://www.nature.com/articles/ncomms13903 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Ice Sheet |
genre_facet |
Greenland Ice Sheet |
op_source |
Nature Communications volume 7, issue 1 ISSN 2041-1723 |
op_rights |
https://creativecommons.org/licenses/by/4.0 https://creativecommons.org/licenses/by/4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1038/ncomms13903 |
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Nature Communications |
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7 |
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1 |
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1766016649757982720 |