Refined broad-scale sub-glacial morphology of Aurora Subglacial Basin, East Antarctica derived by an ice-dynamics-based interpolation scheme
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 phy...
Published in: | The Cryosphere |
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Format: | Article in Journal/Newspaper |
Language: | English |
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2011
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Online Access: | https://eprints.utas.edu.au/11853/ https://eprints.utas.edu.au/11853/1/tc-5-551-2011.pdf https://doi.org/10.5194/tc-5-551-2011 |
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ftunivtasmania:oai:eprints.utas.edu.au:11853 2023-05-15T13:36:47+02:00 Refined broad-scale sub-glacial morphology of Aurora Subglacial Basin, East Antarctica derived by an ice-dynamics-based interpolation scheme Roberts, JL Warner, RC Young, D Wright, A van Ommen, TD Blankenship, DD Siegert, M Young, NW Tabacco, IE Forieri, A Zirizzotti, A Frezzotti, M 2011-07-13 application/pdf https://eprints.utas.edu.au/11853/ https://eprints.utas.edu.au/11853/1/tc-5-551-2011.pdf https://doi.org/10.5194/tc-5-551-2011 en eng https://eprints.utas.edu.au/11853/1/tc-5-551-2011.pdf Roberts, JL, Warner, RC, Young, D, Wright, A, van Ommen, TD, Blankenship, DD, Siegert, M, Young, NW, Tabacco, IE, Forieri, A, Zirizzotti, A and Frezzotti, M 2011 , 'Refined broad-scale sub-glacial morphology of Aurora Subglacial Basin, East Antarctica derived by an ice-dynamics-based interpolation scheme' , The Cryosphere, vol. 5 , pp. 551-560 , doi:10.5194/tc-5-551-2011 <http://dx.doi.org/10.5194/tc-5-551-2011>. cc_utas Article PeerReviewed 2011 ftunivtasmania https://doi.org/10.5194/tc-5-551-2011 2020-05-30T07:25:41Z 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. Article in Journal/Newspaper Antarc* Antarctica East Antarctica Ice Sheet The Cryosphere University of Tasmania: UTas ePrints East Antarctica The Cryosphere 5 3 551 560 |
institution |
Open Polar |
collection |
University of Tasmania: UTas ePrints |
op_collection_id |
ftunivtasmania |
language |
English |
description |
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. |
format |
Article in Journal/Newspaper |
author |
Roberts, JL Warner, RC Young, D Wright, A van Ommen, TD Blankenship, DD Siegert, M Young, NW Tabacco, IE Forieri, A Zirizzotti, A Frezzotti, M |
spellingShingle |
Roberts, JL Warner, RC Young, D Wright, A van Ommen, TD Blankenship, DD Siegert, M Young, NW Tabacco, IE Forieri, A Zirizzotti, A Frezzotti, M Refined broad-scale sub-glacial morphology of Aurora Subglacial Basin, East Antarctica derived by an ice-dynamics-based interpolation scheme |
author_facet |
Roberts, JL Warner, RC Young, D Wright, A van Ommen, TD Blankenship, DD Siegert, M Young, NW Tabacco, IE Forieri, A Zirizzotti, A Frezzotti, M |
author_sort |
Roberts, JL |
title |
Refined broad-scale sub-glacial morphology of Aurora Subglacial Basin, East Antarctica derived by an ice-dynamics-based interpolation scheme |
title_short |
Refined broad-scale sub-glacial morphology of Aurora Subglacial Basin, East Antarctica derived by an ice-dynamics-based interpolation scheme |
title_full |
Refined broad-scale sub-glacial morphology of Aurora Subglacial Basin, East Antarctica derived by an ice-dynamics-based interpolation scheme |
title_fullStr |
Refined broad-scale sub-glacial morphology of Aurora Subglacial Basin, East Antarctica derived by an ice-dynamics-based interpolation scheme |
title_full_unstemmed |
Refined broad-scale sub-glacial morphology of Aurora Subglacial Basin, East Antarctica derived by an ice-dynamics-based interpolation scheme |
title_sort |
refined broad-scale sub-glacial morphology of aurora subglacial basin, east antarctica derived by an ice-dynamics-based interpolation scheme |
publishDate |
2011 |
url |
https://eprints.utas.edu.au/11853/ https://eprints.utas.edu.au/11853/1/tc-5-551-2011.pdf https://doi.org/10.5194/tc-5-551-2011 |
geographic |
East Antarctica |
geographic_facet |
East Antarctica |
genre |
Antarc* Antarctica East Antarctica Ice Sheet The Cryosphere |
genre_facet |
Antarc* Antarctica East Antarctica Ice Sheet The Cryosphere |
op_relation |
https://eprints.utas.edu.au/11853/1/tc-5-551-2011.pdf Roberts, JL, Warner, RC, Young, D, Wright, A, van Ommen, TD, Blankenship, DD, Siegert, M, Young, NW, Tabacco, IE, Forieri, A, Zirizzotti, A and Frezzotti, M 2011 , 'Refined broad-scale sub-glacial morphology of Aurora Subglacial Basin, East Antarctica derived by an ice-dynamics-based interpolation scheme' , The Cryosphere, vol. 5 , pp. 551-560 , doi:10.5194/tc-5-551-2011 <http://dx.doi.org/10.5194/tc-5-551-2011>. |
op_rights |
cc_utas |
op_doi |
https://doi.org/10.5194/tc-5-551-2011 |
container_title |
The Cryosphere |
container_volume |
5 |
container_issue |
3 |
container_start_page |
551 |
op_container_end_page |
560 |
_version_ |
1766084013600014336 |