The impact of glacier geometry on meltwater plume structure and submarine melt in Greenland fjords
Meltwater from the Greenland Ice Sheet often drains subglacially into fjords, driving upwelling plumes at glacier termini. Ocean models and observations of submarine termini suggest that plumes enhance melt and undercutting, leading to calving and potential glacier destabilization. Here we systemati...
Published in: | Geophysical Research Letters |
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American Geophysical Union
2017
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Online Access: | http://hdl.handle.net/1808/25494 https://doi.org/10.1002/2016GL070170 |
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ftunivkansas:oai:kuscholarworks.ku.edu:1808/25494 2023-05-15T16:20:49+02:00 The impact of glacier geometry on meltwater plume structure and submarine melt in Greenland fjords Carroll, Dustin Sutherland, David A. Hudson, B. Moon, T. Catania, Ginny A. Shroyer, Emily L. Nash, Jonathan D. Bartholomaus, Timothy C. Felikson, Denis Stearns, Leigh A. Noel, Brice P. Y. van den Broeke, Michiel R. 2017-11-27T19:18:44Z http://hdl.handle.net/1808/25494 https://doi.org/10.1002/2016GL070170 unknown American Geophysical Union Carroll, D., et al. (2016), The impact ofglacier geometry on meltwater plumestructure and submarine melt inGreenland fjords, Geophys. Res. Lett., 43,9739–9748, doi:10.1002/2016GL070170. http://hdl.handle.net/1808/25494 doi:10.1002/2016GL070170 ©2016. American Geophysical Union. All Rights Reserved. openAccess Greenland Ice Sheet Outlet glacier Fjord Submarine melt Modeling Physical oceanography Article 2017 ftunivkansas https://doi.org/10.1002/2016GL070170 2022-08-26T13:22:34Z Meltwater from the Greenland Ice Sheet often drains subglacially into fjords, driving upwelling plumes at glacier termini. Ocean models and observations of submarine termini suggest that plumes enhance melt and undercutting, leading to calving and potential glacier destabilization. Here we systematically evaluate how simulated plume structure and submarine melt during summer months depends on realistic ranges of subglacial discharge, glacier depth, and ocean stratification from 12 Greenland fjords. Our results show that grounding line depth is a strong control on plume-induced submarine melt: deep glaciers produce warm, salty subsurface plumes that undercut termini, and shallow glaciers produce cold, fresh surface-trapped plumes that can overcut termini. Due to sustained upwelling velocities, plumes in cold, shallow fjords can induce equivalent depth-averaged melt rates compared to warm, deep fjords. These results detail a direct ocean-ice feedback that can affect the Greenland Ice Sheet. Article in Journal/Newspaper glacier Greenland Ice Sheet The University of Kansas: KU ScholarWorks Greenland Geophysical Research Letters 43 18 9739 9748 |
institution |
Open Polar |
collection |
The University of Kansas: KU ScholarWorks |
op_collection_id |
ftunivkansas |
language |
unknown |
topic |
Greenland Ice Sheet Outlet glacier Fjord Submarine melt Modeling Physical oceanography |
spellingShingle |
Greenland Ice Sheet Outlet glacier Fjord Submarine melt Modeling Physical oceanography Carroll, Dustin Sutherland, David A. Hudson, B. Moon, T. Catania, Ginny A. Shroyer, Emily L. Nash, Jonathan D. Bartholomaus, Timothy C. Felikson, Denis Stearns, Leigh A. Noel, Brice P. Y. van den Broeke, Michiel R. The impact of glacier geometry on meltwater plume structure and submarine melt in Greenland fjords |
topic_facet |
Greenland Ice Sheet Outlet glacier Fjord Submarine melt Modeling Physical oceanography |
description |
Meltwater from the Greenland Ice Sheet often drains subglacially into fjords, driving upwelling plumes at glacier termini. Ocean models and observations of submarine termini suggest that plumes enhance melt and undercutting, leading to calving and potential glacier destabilization. Here we systematically evaluate how simulated plume structure and submarine melt during summer months depends on realistic ranges of subglacial discharge, glacier depth, and ocean stratification from 12 Greenland fjords. Our results show that grounding line depth is a strong control on plume-induced submarine melt: deep glaciers produce warm, salty subsurface plumes that undercut termini, and shallow glaciers produce cold, fresh surface-trapped plumes that can overcut termini. Due to sustained upwelling velocities, plumes in cold, shallow fjords can induce equivalent depth-averaged melt rates compared to warm, deep fjords. These results detail a direct ocean-ice feedback that can affect the Greenland Ice Sheet. |
format |
Article in Journal/Newspaper |
author |
Carroll, Dustin Sutherland, David A. Hudson, B. Moon, T. Catania, Ginny A. Shroyer, Emily L. Nash, Jonathan D. Bartholomaus, Timothy C. Felikson, Denis Stearns, Leigh A. Noel, Brice P. Y. van den Broeke, Michiel R. |
author_facet |
Carroll, Dustin Sutherland, David A. Hudson, B. Moon, T. Catania, Ginny A. Shroyer, Emily L. Nash, Jonathan D. Bartholomaus, Timothy C. Felikson, Denis Stearns, Leigh A. Noel, Brice P. Y. van den Broeke, Michiel R. |
author_sort |
Carroll, Dustin |
title |
The impact of glacier geometry on meltwater plume structure and submarine melt in Greenland fjords |
title_short |
The impact of glacier geometry on meltwater plume structure and submarine melt in Greenland fjords |
title_full |
The impact of glacier geometry on meltwater plume structure and submarine melt in Greenland fjords |
title_fullStr |
The impact of glacier geometry on meltwater plume structure and submarine melt in Greenland fjords |
title_full_unstemmed |
The impact of glacier geometry on meltwater plume structure and submarine melt in Greenland fjords |
title_sort |
impact of glacier geometry on meltwater plume structure and submarine melt in greenland fjords |
publisher |
American Geophysical Union |
publishDate |
2017 |
url |
http://hdl.handle.net/1808/25494 https://doi.org/10.1002/2016GL070170 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
glacier Greenland Ice Sheet |
genre_facet |
glacier Greenland Ice Sheet |
op_relation |
Carroll, D., et al. (2016), The impact ofglacier geometry on meltwater plumestructure and submarine melt inGreenland fjords, Geophys. Res. Lett., 43,9739–9748, doi:10.1002/2016GL070170. http://hdl.handle.net/1808/25494 doi:10.1002/2016GL070170 |
op_rights |
©2016. American Geophysical Union. All Rights Reserved. openAccess |
op_doi |
https://doi.org/10.1002/2016GL070170 |
container_title |
Geophysical Research Letters |
container_volume |
43 |
container_issue |
18 |
container_start_page |
9739 |
op_container_end_page |
9748 |
_version_ |
1766008836682940416 |