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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 Type:	Article
Authors/Creators:	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 Zirizzotti, A and Frezzotti, M
Journal or Publication Title:	The Cryosphere
DOI / ID Number:	https://doi.org/10.5194/tc-5-551-2011
Additional Information:	© Author(s) 2011. This work is distributed under the Creative Commons Attribution 3.0 License.
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