A deep subglacial embayment adjacent to the grounding line of Institute Ice Stream, West Antarctica
The Institute Ice Stream (IIS) in West Antarctica may be increasingly vulnerable to melting at the grounding line through modifications in ocean circulation. Understanding such change requires knowledge of grounding-line boundary conditions, including the topography on which it rests. Here, we discu...
Published in: | Geological Society, London, Special Publications |
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Geological Society of London
2017
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Online Access: | http://nora.nerc.ac.uk/id/eprint/517226/ https://doi.org/10.1144/SP461.11 |
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ftnerc:oai:nora.nerc.ac.uk:517226 2024-01-14T10:01:35+01:00 A deep subglacial embayment adjacent to the grounding line of Institute Ice Stream, West Antarctica Jeofry, Hafeez Ross, Neil Corr, Hugh F.J. Li, Jilu Gogineni, Prasad Siegert, Martin J. Siegert, M.J. Jamieson, S.S.R. White, D.A. 2017-06-13 http://nora.nerc.ac.uk/id/eprint/517226/ https://doi.org/10.1144/SP461.11 unknown Geological Society of London Jeofry, Hafeez; Ross, Neil; Corr, Hugh F.J.; Li, Jilu; Gogineni, Prasad; Siegert, Martin J. 2017 A deep subglacial embayment adjacent to the grounding line of Institute Ice Stream, West Antarctica. In: Siegert, M.J.; Jamieson, S.S.R.; White, D.A., (eds.) Exploration of subsurface Antarctica: uncovering past changes and modern processes. London, Geological Society of London, 161-173, 13pp. (Geological Society of London, Special Publication, 461). Publication - Book Section PeerReviewed 2017 ftnerc https://doi.org/10.1144/SP461.11 2023-12-15T00:03:29Z The Institute Ice Stream (IIS) in West Antarctica may be increasingly vulnerable to melting at the grounding line through modifications in ocean circulation. Understanding such change requires knowledge of grounding-line boundary conditions, including the topography on which it rests. Here, we discuss evidence from new radio-echo sounding (RES) data on the subglacial topography adjacent to the grounding line of the IIS. In doing so, we reveal a previously unknown subglacial embayment immediately inland of the IIS grounding zone which is not represented in the Bedmap2 compilation. We discuss whether there is an open-water connection between the embayment and the ice-shelf cavity. The exact location of the grounding line over the embayment has been the subject of considerable uncertainty, with several positions being proposed recently. From our compilation of data, we are able to explain which of these grounding lines is most likely and, in doing so, highlight the need for accurate bed topography in conjunction with satellite observations to fully comprehend ice-sheet processes in this region and other vulnerable locations at the grounded margin of Antarctica. Book Part Antarc* Antarctica Ice Sheet Ice Shelf Institute Ice Stream West Antarctica Natural Environment Research Council: NERC Open Research Archive Institute Ice Stream ENVELOPE(-75.000,-75.000,-82.000,-82.000) West Antarctica Geological Society, London, Special Publications 461 1 161 173 |
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Open Polar |
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Natural Environment Research Council: NERC Open Research Archive |
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ftnerc |
language |
unknown |
description |
The Institute Ice Stream (IIS) in West Antarctica may be increasingly vulnerable to melting at the grounding line through modifications in ocean circulation. Understanding such change requires knowledge of grounding-line boundary conditions, including the topography on which it rests. Here, we discuss evidence from new radio-echo sounding (RES) data on the subglacial topography adjacent to the grounding line of the IIS. In doing so, we reveal a previously unknown subglacial embayment immediately inland of the IIS grounding zone which is not represented in the Bedmap2 compilation. We discuss whether there is an open-water connection between the embayment and the ice-shelf cavity. The exact location of the grounding line over the embayment has been the subject of considerable uncertainty, with several positions being proposed recently. From our compilation of data, we are able to explain which of these grounding lines is most likely and, in doing so, highlight the need for accurate bed topography in conjunction with satellite observations to fully comprehend ice-sheet processes in this region and other vulnerable locations at the grounded margin of Antarctica. |
author2 |
Siegert, M.J. Jamieson, S.S.R. White, D.A. |
format |
Book Part |
author |
Jeofry, Hafeez Ross, Neil Corr, Hugh F.J. Li, Jilu Gogineni, Prasad Siegert, Martin J. |
spellingShingle |
Jeofry, Hafeez Ross, Neil Corr, Hugh F.J. Li, Jilu Gogineni, Prasad Siegert, Martin J. A deep subglacial embayment adjacent to the grounding line of Institute Ice Stream, West Antarctica |
author_facet |
Jeofry, Hafeez Ross, Neil Corr, Hugh F.J. Li, Jilu Gogineni, Prasad Siegert, Martin J. |
author_sort |
Jeofry, Hafeez |
title |
A deep subglacial embayment adjacent to the grounding line of Institute Ice Stream, West Antarctica |
title_short |
A deep subglacial embayment adjacent to the grounding line of Institute Ice Stream, West Antarctica |
title_full |
A deep subglacial embayment adjacent to the grounding line of Institute Ice Stream, West Antarctica |
title_fullStr |
A deep subglacial embayment adjacent to the grounding line of Institute Ice Stream, West Antarctica |
title_full_unstemmed |
A deep subglacial embayment adjacent to the grounding line of Institute Ice Stream, West Antarctica |
title_sort |
deep subglacial embayment adjacent to the grounding line of institute ice stream, west antarctica |
publisher |
Geological Society of London |
publishDate |
2017 |
url |
http://nora.nerc.ac.uk/id/eprint/517226/ https://doi.org/10.1144/SP461.11 |
long_lat |
ENVELOPE(-75.000,-75.000,-82.000,-82.000) |
geographic |
Institute Ice Stream West Antarctica |
geographic_facet |
Institute Ice Stream West Antarctica |
genre |
Antarc* Antarctica Ice Sheet Ice Shelf Institute Ice Stream West Antarctica |
genre_facet |
Antarc* Antarctica Ice Sheet Ice Shelf Institute Ice Stream West Antarctica |
op_relation |
Jeofry, Hafeez; Ross, Neil; Corr, Hugh F.J.; Li, Jilu; Gogineni, Prasad; Siegert, Martin J. 2017 A deep subglacial embayment adjacent to the grounding line of Institute Ice Stream, West Antarctica. In: Siegert, M.J.; Jamieson, S.S.R.; White, D.A., (eds.) Exploration of subsurface Antarctica: uncovering past changes and modern processes. London, Geological Society of London, 161-173, 13pp. (Geological Society of London, Special Publication, 461). |
op_doi |
https://doi.org/10.1144/SP461.11 |
container_title |
Geological Society, London, Special Publications |
container_volume |
461 |
container_issue |
1 |
container_start_page |
161 |
op_container_end_page |
173 |
_version_ |
1788067351084662784 |