Topographic steering of enhanced ice flow at the bottleneck between East and West Antarctica
Hypothesized drawdown of the East Antarctic Ice Sheet (EAIS) through the ‘bottleneck’ zone between East and West Antarctica would have significant impacts for a large proportion of the Antarctic Ice Sheet. Earth observation satellite orbits and a sparseness of radio‐echo sounding (RES) data have res...
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American Geophysical Union
2018
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ftunivnorthumb:oai:nrl.northumbria.ac.uk:34189 2023-05-15T13:56:54+02:00 Topographic steering of enhanced ice flow at the bottleneck between East and West Antarctica Winter, Kate Ross, Neil Ferraccioli, Fausto Jordan, Tom Corr, Hugh Forsberg, René Matsuoka, Kenichi Olesen, Arne Casal, Tania 2018-05-28 text https://nrl.northumbria.ac.uk/id/eprint/34189/ https://doi.org/10.1029/2018GL077504 https://nrl.northumbria.ac.uk/id/eprint/34189/1/Topographic%20steering.pdf https://nrl.northumbria.ac.uk/id/eprint/34189/8/2018GL077504.pdf en eng American Geophysical Union https://nrl.northumbria.ac.uk/id/eprint/34189/1/Topographic%20steering.pdf https://nrl.northumbria.ac.uk/id/eprint/34189/8/2018GL077504.pdf Winter, Kate, Ross, Neil, Ferraccioli, Fausto, Jordan, Tom, Corr, Hugh, Forsberg, René, Matsuoka, Kenichi, Olesen, Arne and Casal, Tania (2018) Topographic steering of enhanced ice flow at the bottleneck between East and West Antarctica. Geophysical Research Letters, 45 (10). pp. 4899-4907. ISSN 0094-8276 cc_by_nc_nd_4_0 CC-BY-NC-ND F800 Physical and Terrestrial Geographical and Environmental Sciences Article PeerReviewed 2018 ftunivnorthumb https://doi.org/10.1029/2018GL077504 2022-09-25T06:07:14Z Hypothesized drawdown of the East Antarctic Ice Sheet (EAIS) through the ‘bottleneck’ zone between East and West Antarctica would have significant impacts for a large proportion of the Antarctic Ice Sheet. Earth observation satellite orbits and a sparseness of radio‐echo sounding (RES) data have restricted investigations of basal boundary controls on ice flow in this region until now. New airborne RES surveys reveal complex topography of high relief beneath the southernmost Weddell/Ross ice divide, with three subglacial troughs connecting interior Antarctica to the Foundation and Patuxent Ice Streams and Siple Coast ice streams. These troughs route enhanced ice flow through the interior of Antarctica but limit potential drawdown of the EAIS through the bottleneck zone. In a thinning or retreating scenario, these topographically‐controlled corridors of enhanced flow could however drive ice divide migration, and increase mass discharge from interior West Antarctica to the Southern Ocean. Article in Journal/Newspaper Antarc* Antarctic Antarctica Ice Sheet Southern Ocean West Antarctica Northumbria University, Newcastle: Northumbria Research Link (NRL) Antarctic East Antarctic Ice Sheet Siple ENVELOPE(-83.917,-83.917,-75.917,-75.917) Siple Coast ENVELOPE(-155.000,-155.000,-82.000,-82.000) Southern Ocean The Antarctic Weddell West Antarctica Geophysical Research Letters 45 10 4899 4907 |
institution |
Open Polar |
collection |
Northumbria University, Newcastle: Northumbria Research Link (NRL) |
op_collection_id |
ftunivnorthumb |
language |
English |
topic |
F800 Physical and Terrestrial Geographical and Environmental Sciences |
spellingShingle |
F800 Physical and Terrestrial Geographical and Environmental Sciences Winter, Kate Ross, Neil Ferraccioli, Fausto Jordan, Tom Corr, Hugh Forsberg, René Matsuoka, Kenichi Olesen, Arne Casal, Tania Topographic steering of enhanced ice flow at the bottleneck between East and West Antarctica |
topic_facet |
F800 Physical and Terrestrial Geographical and Environmental Sciences |
description |
Hypothesized drawdown of the East Antarctic Ice Sheet (EAIS) through the ‘bottleneck’ zone between East and West Antarctica would have significant impacts for a large proportion of the Antarctic Ice Sheet. Earth observation satellite orbits and a sparseness of radio‐echo sounding (RES) data have restricted investigations of basal boundary controls on ice flow in this region until now. New airborne RES surveys reveal complex topography of high relief beneath the southernmost Weddell/Ross ice divide, with three subglacial troughs connecting interior Antarctica to the Foundation and Patuxent Ice Streams and Siple Coast ice streams. These troughs route enhanced ice flow through the interior of Antarctica but limit potential drawdown of the EAIS through the bottleneck zone. In a thinning or retreating scenario, these topographically‐controlled corridors of enhanced flow could however drive ice divide migration, and increase mass discharge from interior West Antarctica to the Southern Ocean. |
format |
Article in Journal/Newspaper |
author |
Winter, Kate Ross, Neil Ferraccioli, Fausto Jordan, Tom Corr, Hugh Forsberg, René Matsuoka, Kenichi Olesen, Arne Casal, Tania |
author_facet |
Winter, Kate Ross, Neil Ferraccioli, Fausto Jordan, Tom Corr, Hugh Forsberg, René Matsuoka, Kenichi Olesen, Arne Casal, Tania |
author_sort |
Winter, Kate |
title |
Topographic steering of enhanced ice flow at the bottleneck between East and West Antarctica |
title_short |
Topographic steering of enhanced ice flow at the bottleneck between East and West Antarctica |
title_full |
Topographic steering of enhanced ice flow at the bottleneck between East and West Antarctica |
title_fullStr |
Topographic steering of enhanced ice flow at the bottleneck between East and West Antarctica |
title_full_unstemmed |
Topographic steering of enhanced ice flow at the bottleneck between East and West Antarctica |
title_sort |
topographic steering of enhanced ice flow at the bottleneck between east and west antarctica |
publisher |
American Geophysical Union |
publishDate |
2018 |
url |
https://nrl.northumbria.ac.uk/id/eprint/34189/ https://doi.org/10.1029/2018GL077504 https://nrl.northumbria.ac.uk/id/eprint/34189/1/Topographic%20steering.pdf https://nrl.northumbria.ac.uk/id/eprint/34189/8/2018GL077504.pdf |
long_lat |
ENVELOPE(-83.917,-83.917,-75.917,-75.917) ENVELOPE(-155.000,-155.000,-82.000,-82.000) |
geographic |
Antarctic East Antarctic Ice Sheet Siple Siple Coast Southern Ocean The Antarctic Weddell West Antarctica |
geographic_facet |
Antarctic East Antarctic Ice Sheet Siple Siple Coast Southern Ocean The Antarctic Weddell West Antarctica |
genre |
Antarc* Antarctic Antarctica Ice Sheet Southern Ocean West Antarctica |
genre_facet |
Antarc* Antarctic Antarctica Ice Sheet Southern Ocean West Antarctica |
op_relation |
https://nrl.northumbria.ac.uk/id/eprint/34189/1/Topographic%20steering.pdf https://nrl.northumbria.ac.uk/id/eprint/34189/8/2018GL077504.pdf Winter, Kate, Ross, Neil, Ferraccioli, Fausto, Jordan, Tom, Corr, Hugh, Forsberg, René, Matsuoka, Kenichi, Olesen, Arne and Casal, Tania (2018) Topographic steering of enhanced ice flow at the bottleneck between East and West Antarctica. Geophysical Research Letters, 45 (10). pp. 4899-4907. ISSN 0094-8276 |
op_rights |
cc_by_nc_nd_4_0 |
op_rightsnorm |
CC-BY-NC-ND |
op_doi |
https://doi.org/10.1029/2018GL077504 |
container_title |
Geophysical Research Letters |
container_volume |
45 |
container_issue |
10 |
container_start_page |
4899 |
op_container_end_page |
4907 |
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1766264491029299200 |