Greenland subglacial drainage evolution regulated by weakly connected regions of the bed ...
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...
Main Authors: | , , , , , , , , , |
---|---|
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
ETH Zurich
2016
|
Subjects: | |
Online Access: | https://dx.doi.org/10.3929/ethz-b-000124714 http://hdl.handle.net/20.500.11850/124714 |
id |
ftdatacite:10.3929/ethz-b-000124714 |
---|---|
record_format |
openpolar |
spelling |
ftdatacite:10.3929/ethz-b-000124714 2024-04-28T08:21:14+00:00 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 application/pdf https://dx.doi.org/10.3929/ethz-b-000124714 http://hdl.handle.net/20.500.11850/124714 en eng ETH Zurich info:eu-repo/semantics/openAccess Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 article-journal Text ScholarlyArticle Journal Article 2016 ftdatacite https://doi.org/10.3929/ethz-b-000124714 2024-04-02T12:33:25Z 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. ... : Nature Communications, 7 ... Article in Journal/Newspaper Greenland Ice Sheet DataCite Metadata Store (German National Library of Science and Technology) |
institution |
Open Polar |
collection |
DataCite Metadata Store (German National Library of Science and Technology) |
op_collection_id |
ftdatacite |
language |
English |
description |
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. ... : Nature Communications, 7 ... |
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 |
spellingShingle |
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 ... |
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 |
ETH Zurich |
publishDate |
2016 |
url |
https://dx.doi.org/10.3929/ethz-b-000124714 http://hdl.handle.net/20.500.11850/124714 |
genre |
Greenland Ice Sheet |
genre_facet |
Greenland Ice Sheet |
op_rights |
info:eu-repo/semantics/openAccess Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode cc-by-4.0 |
op_doi |
https://doi.org/10.3929/ethz-b-000124714 |
_version_ |
1797583691147378688 |