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Aurora Basin, the weak underbelly of East Antarctica


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]


Copyright Statement

Copyright 2020 American Geophysical Union

DOI: doi:10.1029/2019GL086821


The East Antarctic Ice Sheet (EAIS) has the potential to raise global sea levels by ∼52 m. 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 50 km 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.

Item Details

Item Type:Refereed Article
Keywords:Antarctica, Aurora Subglacial Basin, ice sheet model, climate change, CMIP
Research Division:Earth Sciences
Research Group:Physical geography and environmental geoscience
Research Field:Glaciology
Objective Division:Environmental Policy, Climate Change and Natural Hazards
Objective Group:Understanding climate change
Objective Field:Effects of climate change on Antarctic and sub-Antarctic environments (excl. social impacts)
UTAS Author:McCormack, FS (Dr Felicity McCormack)
ID Code:139701
Year Published:2020
Web of Science® Times Cited:1
Deposited By:Geography and Spatial Science
Deposited On:2020-06-29
Last Modified:2020-07-22

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