Vulnerability of Denman Glacier to ocean heat flux revealed by profiling float observations
Denman Glacier, which drains a marine-based sector of the East Antarctic Ice Sheet with an ice volume equivalent to 1.5m of global sea level rise, has accelerated and undergone grounding line retreat in recent decades. A deep trough and retrograde bed slope inward of the grounding line leave this gl...
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Online Access: | https://doi.org/10.1029/2022GL100460 http://ecite.utas.edu.au/153527 |
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ftunivtasecite:oai:ecite.utas.edu.au:153527 2023-05-15T13:42:41+02:00 Vulnerability of Denman Glacier to ocean heat flux revealed by profiling float observations van Wijk, EM Rintoul, SR Wallace, LO Ribeiro, N Herraiz-Borreguero, L 2022 application/pdf https://doi.org/10.1029/2022GL100460 http://ecite.utas.edu.au/153527 en eng Wiley-Blackwell Publishing, Inc. http://ecite.utas.edu.au/153527/1/Geophysical Research Letters - 2022 - Wijk - Vulnerability of Denman Glacier to Ocean Heat Flux Revealed by Profiling Float.pdf http://dx.doi.org/10.1029/2022GL100460 van Wijk, EM and Rintoul, SR and Wallace, LO and Ribeiro, N and Herraiz-Borreguero, L, Vulnerability of Denman Glacier to ocean heat flux revealed by profiling float observations, Geophysical Research Letters, 49, (18) pp. 1-9. ISSN 1944-8007 (2022) [Refereed Article] http://ecite.utas.edu.au/153527 Earth Sciences Oceanography Physical oceanography Refereed Article PeerReviewed 2022 ftunivtasecite https://doi.org/10.1029/2022GL100460 2022-12-12T23:17:15Z Denman Glacier, which drains a marine-based sector of the East Antarctic Ice Sheet with an ice volume equivalent to 1.5m of global sea level rise, has accelerated and undergone grounding line retreat in recent decades. A deep trough and retrograde bed slope inward of the grounding line leave this glacier prone to marine ice sheet instability. The ocean heat flux to the ice shelf cavity is a critical factor determining the susceptibility of the glacier to unstable retreat. Profiling float observations show modified Circumpolar Deep Water as warm as −0.16C reaches a deep trough extending beneath the Denman Ice Tongue. The ocean heat transport (0.770.35TW) is sufficient to drive high rates of basal melt (70.831.5Gty −1 ), consistent with rates inferred from glaciological observations. These results suggest the Denman Glacier is potentially at risk of unstable retreat triggered by transport of warm water to the ice shelf cavity. Article in Journal/Newspaper Antarc* Antarctic Denman Glacier Ice Sheet Ice Shelf eCite UTAS (University of Tasmania) Antarctic East Antarctic Ice Sheet Denman Glacier ENVELOPE(99.417,99.417,-66.750,-66.750) Geophysical Research Letters 49 18 |
institution |
Open Polar |
collection |
eCite UTAS (University of Tasmania) |
op_collection_id |
ftunivtasecite |
language |
English |
topic |
Earth Sciences Oceanography Physical oceanography |
spellingShingle |
Earth Sciences Oceanography Physical oceanography van Wijk, EM Rintoul, SR Wallace, LO Ribeiro, N Herraiz-Borreguero, L Vulnerability of Denman Glacier to ocean heat flux revealed by profiling float observations |
topic_facet |
Earth Sciences Oceanography Physical oceanography |
description |
Denman Glacier, which drains a marine-based sector of the East Antarctic Ice Sheet with an ice volume equivalent to 1.5m of global sea level rise, has accelerated and undergone grounding line retreat in recent decades. A deep trough and retrograde bed slope inward of the grounding line leave this glacier prone to marine ice sheet instability. The ocean heat flux to the ice shelf cavity is a critical factor determining the susceptibility of the glacier to unstable retreat. Profiling float observations show modified Circumpolar Deep Water as warm as −0.16C reaches a deep trough extending beneath the Denman Ice Tongue. The ocean heat transport (0.770.35TW) is sufficient to drive high rates of basal melt (70.831.5Gty −1 ), consistent with rates inferred from glaciological observations. These results suggest the Denman Glacier is potentially at risk of unstable retreat triggered by transport of warm water to the ice shelf cavity. |
format |
Article in Journal/Newspaper |
author |
van Wijk, EM Rintoul, SR Wallace, LO Ribeiro, N Herraiz-Borreguero, L |
author_facet |
van Wijk, EM Rintoul, SR Wallace, LO Ribeiro, N Herraiz-Borreguero, L |
author_sort |
van Wijk, EM |
title |
Vulnerability of Denman Glacier to ocean heat flux revealed by profiling float observations |
title_short |
Vulnerability of Denman Glacier to ocean heat flux revealed by profiling float observations |
title_full |
Vulnerability of Denman Glacier to ocean heat flux revealed by profiling float observations |
title_fullStr |
Vulnerability of Denman Glacier to ocean heat flux revealed by profiling float observations |
title_full_unstemmed |
Vulnerability of Denman Glacier to ocean heat flux revealed by profiling float observations |
title_sort |
vulnerability of denman glacier to ocean heat flux revealed by profiling float observations |
publisher |
Wiley-Blackwell Publishing, Inc. |
publishDate |
2022 |
url |
https://doi.org/10.1029/2022GL100460 http://ecite.utas.edu.au/153527 |
long_lat |
ENVELOPE(99.417,99.417,-66.750,-66.750) |
geographic |
Antarctic East Antarctic Ice Sheet Denman Glacier |
geographic_facet |
Antarctic East Antarctic Ice Sheet Denman Glacier |
genre |
Antarc* Antarctic Denman Glacier Ice Sheet Ice Shelf |
genre_facet |
Antarc* Antarctic Denman Glacier Ice Sheet Ice Shelf |
op_relation |
http://ecite.utas.edu.au/153527/1/Geophysical Research Letters - 2022 - Wijk - Vulnerability of Denman Glacier to Ocean Heat Flux Revealed by Profiling Float.pdf http://dx.doi.org/10.1029/2022GL100460 van Wijk, EM and Rintoul, SR and Wallace, LO and Ribeiro, N and Herraiz-Borreguero, L, Vulnerability of Denman Glacier to ocean heat flux revealed by profiling float observations, Geophysical Research Letters, 49, (18) pp. 1-9. ISSN 1944-8007 (2022) [Refereed Article] http://ecite.utas.edu.au/153527 |
op_doi |
https://doi.org/10.1029/2022GL100460 |
container_title |
Geophysical Research Letters |
container_volume |
49 |
container_issue |
18 |
_version_ |
1766171657300344832 |