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Refined broad-scale sub-glacial morphology of Aurora Subglacial Basin, East Antarctica derived by an ice-dynamics-based interpolation scheme

Citation

Roberts, JL and Warner, RC and Young, D and Wright, A and van Ommen, TD and Blankenship, DD and Siegert, M and Young, NW and Tabacco, IE and Forieri, A and Passerini, A and Zirizzotti, A and Frezzotti, M, Refined broad-scale sub-glacial morphology of Aurora Subglacial Basin, East Antarctica derived by an ice-dynamics-based interpolation scheme, The Cryosphere, 5, (3) pp. 551-560. ISSN 1994-0416 (2011) [Refereed Article]


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Licensed under Creative Commons Attribution 3.0 Unported (CC BY 3.0) http://creativecommons.org/licenses/by/3.0/

DOI: doi:10.5194/tc-5-551-2011

Abstract

Ice thickness data over much of East Antarctica are sparse and irregularly distributed. This poses difficulties for reconstructing the homogeneous coverage needed to properly assess underlying sub-glacial morphology and fundamental geometric constraints on sea level rise. Here we introduce a new physically-based ice thickness interpolation scheme and apply this to existing ice thickness data in the Aurora Subglacial Basin region. The skill and robustness of the new reconstruction is demonstrated by comparison with new data from the ICECAP project. The interpolated morphology shows an extensive marine-based ice sheet, with considerably more area below sea-level than shown by prior studies. It also shows deep features connecting the coastal grounding zone with the deepest regions in the interior. This has implications for ice sheet response to a warming ocean and underscores the importance of obtaining additional high resolution data in these marginal zones for modelling ice sheet evolution.

Item Details

Item Type:Refereed Article
Keywords:Antarctic ice sheet, ice thickness, topography
Research Division:Earth Sciences
Research Group:Physical Geography and Environmental Geoscience
Research Field:Glaciology
Objective Division:Expanding Knowledge
Objective Group:Expanding Knowledge
Objective Field:Expanding Knowledge in the Environmental Sciences
Author:Roberts, JL (Dr Jason Roberts)
Author:Warner, RC (Dr Roland Warner)
Author:van Ommen, TD (Dr Tas van Ommen)
Author:Young, NW (Mr Neal Young)
ID Code:75884
Year Published:2011
Web of Science® Times Cited:15
Deposited By:CRC-Antarctic Climate & Ecosystems
Deposited On:2012-02-20
Last Modified:2017-10-25
Downloads:310 View Download Statistics

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