Ice dynamic response to two modes of surface lake drainage on the Greenland ice sheet
Supraglacial lake drainage on the Greenland ice sheet opens surface-to-bed connections, reduces basal friction, and temporarily increases ice flow velocities by up to an order of magnitude. Existing field-based observations of lake drainages and their impact on ice dynamics are limited, and focus on...
Published in: | Environmental Research Letters |
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Online Access: | https://doi.org/10.1088/1748-9326/8/3/034007 https://doaj.org/article/a58945887f3d4114b6d863b0b3ed2918 |
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ftdoajarticles:oai:doaj.org/article:a58945887f3d4114b6d863b0b3ed2918 2023-09-05T13:19:48+02:00 Ice dynamic response to two modes of surface lake drainage on the Greenland ice sheet Marco Tedesco Ian C Willis Matthew J Hoffman Alison F Banwell Patrick Alexander Neil S Arnold 2013-01-01T00:00:00Z https://doi.org/10.1088/1748-9326/8/3/034007 https://doaj.org/article/a58945887f3d4114b6d863b0b3ed2918 EN eng IOP Publishing https://doi.org/10.1088/1748-9326/8/3/034007 https://doaj.org/toc/1748-9326 doi:10.1088/1748-9326/8/3/034007 1748-9326 https://doaj.org/article/a58945887f3d4114b6d863b0b3ed2918 Environmental Research Letters, Vol 8, Iss 3, p 034007 (2013) Greenland ice dynamics supraglacial lakes Environmental technology. Sanitary engineering TD1-1066 Environmental sciences GE1-350 Science Q Physics QC1-999 article 2013 ftdoajarticles https://doi.org/10.1088/1748-9326/8/3/034007 2023-08-13T00:37:42Z Supraglacial lake drainage on the Greenland ice sheet opens surface-to-bed connections, reduces basal friction, and temporarily increases ice flow velocities by up to an order of magnitude. Existing field-based observations of lake drainages and their impact on ice dynamics are limited, and focus on one specific draining mechanism. Here, we report and analyse global positioning system measurements of ice velocity and elevation made at five locations surrounding two lakes that drained by different mechanisms and produced different dynamic responses. For the lake that drained slowly (>24 h) by overtopping its basin, delivering water via a channel to a pre-existing moulin, speedup and uplift were less than half those associated with a lake that drained rapidly (∼2 h) through hydrofracturing and the creation of new moulins in the lake bottom. Our results suggest that the mode and associated rate of lake drainage govern the impact on ice dynamics. Article in Journal/Newspaper Greenland Ice Sheet Directory of Open Access Journals: DOAJ Articles Greenland Environmental Research Letters 8 3 034007 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Greenland ice dynamics supraglacial lakes Environmental technology. Sanitary engineering TD1-1066 Environmental sciences GE1-350 Science Q Physics QC1-999 |
spellingShingle |
Greenland ice dynamics supraglacial lakes Environmental technology. Sanitary engineering TD1-1066 Environmental sciences GE1-350 Science Q Physics QC1-999 Marco Tedesco Ian C Willis Matthew J Hoffman Alison F Banwell Patrick Alexander Neil S Arnold Ice dynamic response to two modes of surface lake drainage on the Greenland ice sheet |
topic_facet |
Greenland ice dynamics supraglacial lakes Environmental technology. Sanitary engineering TD1-1066 Environmental sciences GE1-350 Science Q Physics QC1-999 |
description |
Supraglacial lake drainage on the Greenland ice sheet opens surface-to-bed connections, reduces basal friction, and temporarily increases ice flow velocities by up to an order of magnitude. Existing field-based observations of lake drainages and their impact on ice dynamics are limited, and focus on one specific draining mechanism. Here, we report and analyse global positioning system measurements of ice velocity and elevation made at five locations surrounding two lakes that drained by different mechanisms and produced different dynamic responses. For the lake that drained slowly (>24 h) by overtopping its basin, delivering water via a channel to a pre-existing moulin, speedup and uplift were less than half those associated with a lake that drained rapidly (∼2 h) through hydrofracturing and the creation of new moulins in the lake bottom. Our results suggest that the mode and associated rate of lake drainage govern the impact on ice dynamics. |
format |
Article in Journal/Newspaper |
author |
Marco Tedesco Ian C Willis Matthew J Hoffman Alison F Banwell Patrick Alexander Neil S Arnold |
author_facet |
Marco Tedesco Ian C Willis Matthew J Hoffman Alison F Banwell Patrick Alexander Neil S Arnold |
author_sort |
Marco Tedesco |
title |
Ice dynamic response to two modes of surface lake drainage on the Greenland ice sheet |
title_short |
Ice dynamic response to two modes of surface lake drainage on the Greenland ice sheet |
title_full |
Ice dynamic response to two modes of surface lake drainage on the Greenland ice sheet |
title_fullStr |
Ice dynamic response to two modes of surface lake drainage on the Greenland ice sheet |
title_full_unstemmed |
Ice dynamic response to two modes of surface lake drainage on the Greenland ice sheet |
title_sort |
ice dynamic response to two modes of surface lake drainage on the greenland ice sheet |
publisher |
IOP Publishing |
publishDate |
2013 |
url |
https://doi.org/10.1088/1748-9326/8/3/034007 https://doaj.org/article/a58945887f3d4114b6d863b0b3ed2918 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland Ice Sheet |
genre_facet |
Greenland Ice Sheet |
op_source |
Environmental Research Letters, Vol 8, Iss 3, p 034007 (2013) |
op_relation |
https://doi.org/10.1088/1748-9326/8/3/034007 https://doaj.org/toc/1748-9326 doi:10.1088/1748-9326/8/3/034007 1748-9326 https://doaj.org/article/a58945887f3d4114b6d863b0b3ed2918 |
op_doi |
https://doi.org/10.1088/1748-9326/8/3/034007 |
container_title |
Environmental Research Letters |
container_volume |
8 |
container_issue |
3 |
container_start_page |
034007 |
_version_ |
1776200611850616832 |