Aurora Basin, the weak underbelly of East Antarctica
The East Antarctic Ice Sheet (EAIS) has the potential to raise global sea levels by ∼52m. Here, we model the evolution of select EAIS catchments to 2100 using three basal melt rate parameterizations and force our model with surface mass balance and ocean thermal anomalies from 10 global climate mode...
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Online Access: | https://doi.org/10.1029/2019GL086821 http://ecite.utas.edu.au/139701 |
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ftunivtasecite:oai:ecite.utas.edu.au:139701 2023-05-15T13:55:18+02:00 Aurora Basin, the weak underbelly of East Antarctica Pelle, T Morlighem, M McCormack, FS 2020 https://doi.org/10.1029/2019GL086821 http://ecite.utas.edu.au/139701 en eng Amer Geophysical Union http://dx.doi.org/10.1029/2019GL086821 Pelle, T and Morlighem, M and McCormack, FS, Aurora Basin, the weak underbelly of East Antarctica, Geophysical Research Letters, 47, (9) Article e2019GL086821. ISSN 0094-8276 (2020) [Refereed Article] http://ecite.utas.edu.au/139701 Earth Sciences Physical Geography and Environmental Geoscience Glaciology Refereed Article PeerReviewed 2020 ftunivtasecite https://doi.org/10.1029/2019GL086821 2020-07-27T22:16:30Z The East Antarctic Ice Sheet (EAIS) has the potential to raise global sea levels by ∼52m. Here, we model the evolution of select EAIS catchments to 2100 using three basal melt rate parameterizations and force our model with surface mass balance and ocean thermal anomalies from 10 global climate models. While the domain loses mass under low‐emission scenarios, it gains ∼10‐mm sea‐level rise equivalent ice volume (SLRe) under high‐emission scenarios. The primary region of thinning is within 50km upstream of Totten Glacier's grounding line. Totten's glacial discharge is modulated by the migration of its grounding line, which is sensitive to brief intrusions of ocean water at temperatures higher than present. Once the grounding line is dislodged, Totten's ice velocity increases by up to 70% of present‐day values, resulting in ∼6‐mm SLRe loss from this sector. Article in Journal/Newspaper Antarc* Antarctic Antarctica East Antarctica Ice Sheet eCite UTAS (University of Tasmania) Antarctic East Antarctic Ice Sheet East Antarctica Geophysical Research Letters 47 9 |
institution |
Open Polar |
collection |
eCite UTAS (University of Tasmania) |
op_collection_id |
ftunivtasecite |
language |
English |
topic |
Earth Sciences Physical Geography and Environmental Geoscience Glaciology |
spellingShingle |
Earth Sciences Physical Geography and Environmental Geoscience Glaciology Pelle, T Morlighem, M McCormack, FS Aurora Basin, the weak underbelly of East Antarctica |
topic_facet |
Earth Sciences Physical Geography and Environmental Geoscience Glaciology |
description |
The East Antarctic Ice Sheet (EAIS) has the potential to raise global sea levels by ∼52m. Here, we model the evolution of select EAIS catchments to 2100 using three basal melt rate parameterizations and force our model with surface mass balance and ocean thermal anomalies from 10 global climate models. While the domain loses mass under low‐emission scenarios, it gains ∼10‐mm sea‐level rise equivalent ice volume (SLRe) under high‐emission scenarios. The primary region of thinning is within 50km upstream of Totten Glacier's grounding line. Totten's glacial discharge is modulated by the migration of its grounding line, which is sensitive to brief intrusions of ocean water at temperatures higher than present. Once the grounding line is dislodged, Totten's ice velocity increases by up to 70% of present‐day values, resulting in ∼6‐mm SLRe loss from this sector. |
format |
Article in Journal/Newspaper |
author |
Pelle, T Morlighem, M McCormack, FS |
author_facet |
Pelle, T Morlighem, M McCormack, FS |
author_sort |
Pelle, T |
title |
Aurora Basin, the weak underbelly of East Antarctica |
title_short |
Aurora Basin, the weak underbelly of East Antarctica |
title_full |
Aurora Basin, the weak underbelly of East Antarctica |
title_fullStr |
Aurora Basin, the weak underbelly of East Antarctica |
title_full_unstemmed |
Aurora Basin, the weak underbelly of East Antarctica |
title_sort |
aurora basin, the weak underbelly of east antarctica |
publisher |
Amer Geophysical Union |
publishDate |
2020 |
url |
https://doi.org/10.1029/2019GL086821 http://ecite.utas.edu.au/139701 |
geographic |
Antarctic East Antarctic Ice Sheet East Antarctica |
geographic_facet |
Antarctic East Antarctic Ice Sheet East Antarctica |
genre |
Antarc* Antarctic Antarctica East Antarctica Ice Sheet |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica Ice Sheet |
op_relation |
http://dx.doi.org/10.1029/2019GL086821 Pelle, T and Morlighem, M and McCormack, FS, Aurora Basin, the weak underbelly of East Antarctica, Geophysical Research Letters, 47, (9) Article e2019GL086821. ISSN 0094-8276 (2020) [Refereed Article] http://ecite.utas.edu.au/139701 |
op_doi |
https://doi.org/10.1029/2019GL086821 |
container_title |
Geophysical Research Letters |
container_volume |
47 |
container_issue |
9 |
_version_ |
1766261726223794176 |