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: | unknown |
Published: |
Digital Commons @ University of South Florida
2016
|
Subjects: | |
Online Access: | https://digitalcommons.usf.edu/geo_facpub/1082 https://digitalcommons.usf.edu/cgi/viewcontent.cgi?article=2081&context=geo_facpub |
id |
ftunisfloridatam:oai:digitalcommons.usf.edu:geo_facpub-2081 |
---|---|
record_format |
openpolar |
spelling |
ftunisfloridatam:oai:digitalcommons.usf.edu:geo_facpub-2081 2023-05-15T16:27:13+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 2016-12-01T08:00:00Z application/pdf https://digitalcommons.usf.edu/geo_facpub/1082 https://digitalcommons.usf.edu/cgi/viewcontent.cgi?article=2081&context=geo_facpub unknown Digital Commons @ University of South Florida https://digitalcommons.usf.edu/geo_facpub/1082 https://digitalcommons.usf.edu/cgi/viewcontent.cgi?article=2081&context=geo_facpub http://creativecommons.org/licenses/by/4.0/ CC-BY School of Geosciences Faculty and Staff Publications Cryospheric science Hydrology Earth Sciences article 2016 ftunisfloridatam 2021-10-09T07:42:41Z 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 Digital Commons University of South Florida (USF) Greenland |
institution |
Open Polar |
collection |
Digital Commons University of South Florida (USF) |
op_collection_id |
ftunisfloridatam |
language |
unknown |
topic |
Cryospheric science Hydrology Earth Sciences |
spellingShingle |
Cryospheric science Hydrology Earth Sciences 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 |
Cryospheric science Hydrology Earth Sciences |
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. |
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 |
Digital Commons @ University of South Florida |
publishDate |
2016 |
url |
https://digitalcommons.usf.edu/geo_facpub/1082 https://digitalcommons.usf.edu/cgi/viewcontent.cgi?article=2081&context=geo_facpub |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Ice Sheet |
genre_facet |
Greenland Ice Sheet |
op_source |
School of Geosciences Faculty and Staff Publications |
op_relation |
https://digitalcommons.usf.edu/geo_facpub/1082 https://digitalcommons.usf.edu/cgi/viewcontent.cgi?article=2081&context=geo_facpub |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_rightsnorm |
CC-BY |
_version_ |
1766016331459592192 |