A new bathymetry for the southeastern Filchner-Ronne Ice Shelf: implications for modern oceanographic processes and glacial history
The Filchner‐Ronne Ice Shelf, the ocean cavity beneath it and the Weddell Sea that bounds it, form an important part of the global climate system by modulating ice discharge from the Antarctic Ice Sheet and producing cold dense water masses that feed the global thermohaline circulation. A prerequisi...
Published in: | Journal of Geophysical Research: Oceans |
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American Geophysical Union
2018
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Online Access: | http://nora.nerc.ac.uk/id/eprint/520273/ https://nora.nerc.ac.uk/id/eprint/520273/7/Rosier-2018-A-new-bathymetry-for-the-southeaste.pdf https://doi.org/10.1029/2018JC013982 |
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ftnerc:oai:nora.nerc.ac.uk:520273 2023-05-15T13:49:35+02:00 A new bathymetry for the southeastern Filchner-Ronne Ice Shelf: implications for modern oceanographic processes and glacial history Rosier, Sebastian H.R. Hofstede, C. Brisbourne, Alex M. Hattermann, T. Nicholls, Keith W. Davis, Peter E.D. Anker, Paul G.D. Hillenbrand, Claus-Dieter Smith, Andy M. Corr, Hugh F.J. 2018-06-08 text http://nora.nerc.ac.uk/id/eprint/520273/ https://nora.nerc.ac.uk/id/eprint/520273/7/Rosier-2018-A-new-bathymetry-for-the-southeaste.pdf https://doi.org/10.1029/2018JC013982 en eng American Geophysical Union https://nora.nerc.ac.uk/id/eprint/520273/7/Rosier-2018-A-new-bathymetry-for-the-southeaste.pdf Rosier, Sebastian H.R. orcid:0000-0003-3047-9908 Hofstede, C.; Brisbourne, Alex M. orcid:0000-0002-9887-7120 Hattermann, T.; Nicholls, Keith W. orcid:0000-0002-2188-4509 Davis, Peter E.D. orcid:0000-0002-6471-6310 Anker, Paul G.D. orcid:0000-0002-4359-4342 Hillenbrand, Claus-Dieter orcid:0000-0003-0240-7317 Smith, Andy M. orcid:0000-0001-8577-482X Corr, Hugh F.J. 2018 A new bathymetry for the southeastern Filchner-Ronne Ice Shelf: implications for modern oceanographic processes and glacial history. Journal of Geophysical Research: Oceans, 123 (7). 4610-4623. https://doi.org/10.1029/2018JC013982 <https://doi.org/10.1029/2018JC013982> cc_by_4 CC-BY Publication - Article PeerReviewed 2018 ftnerc https://doi.org/10.1029/2018JC013982 2023-02-04T19:46:39Z The Filchner‐Ronne Ice Shelf, the ocean cavity beneath it and the Weddell Sea that bounds it, form an important part of the global climate system by modulating ice discharge from the Antarctic Ice Sheet and producing cold dense water masses that feed the global thermohaline circulation. A prerequisite for modeling the ice sheet and oceanographic processes within the cavity is an accurate knowledge of the sub‐ice‐sheet bedrock elevation, but beneath the ice shelf where airborne radar cannot penetrate, bathymetric data are sparse. This paper presents new seismic point measurements of cavity geometry from a particularly poorly sampled region south of Berkner Island that connects the Filchner and Ronne ice shelves. An updated bathymetric grid formed by combining the new data with existing datasets reveals several new features. In particular, a sill running between Berkner Island and the mainland could alter ocean circulation within the cavity and change our understanding of paleo‐ice‐stream flow in the region. Also revealed are deep troughs near the grounding lines of Foundation and Support Force ice streams, which provide access for seawater with melting potential. Running an ocean tidal model with the new bathymetry reveals large differences in tidal current velocities, both within the new gridded region and further afield, potentially affecting sub‐ice‐shelf melt rates. Article in Journal/Newspaper Antarc* Antarctic Berkner Island Filchner Ronne Ice Shelf Filchner-Ronne Ice Shelf Ice Sheet Ice Shelf Ice Shelves Ronne Ice Shelf Weddell Sea Natural Environment Research Council: NERC Open Research Archive Antarctic The Antarctic Weddell Sea Weddell Ronne Ice Shelf ENVELOPE(-61.000,-61.000,-78.500,-78.500) Berkner Island ENVELOPE(-48.117,-48.117,-79.333,-79.333) Journal of Geophysical Research: Oceans 123 7 4610 4623 |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
English |
description |
The Filchner‐Ronne Ice Shelf, the ocean cavity beneath it and the Weddell Sea that bounds it, form an important part of the global climate system by modulating ice discharge from the Antarctic Ice Sheet and producing cold dense water masses that feed the global thermohaline circulation. A prerequisite for modeling the ice sheet and oceanographic processes within the cavity is an accurate knowledge of the sub‐ice‐sheet bedrock elevation, but beneath the ice shelf where airborne radar cannot penetrate, bathymetric data are sparse. This paper presents new seismic point measurements of cavity geometry from a particularly poorly sampled region south of Berkner Island that connects the Filchner and Ronne ice shelves. An updated bathymetric grid formed by combining the new data with existing datasets reveals several new features. In particular, a sill running between Berkner Island and the mainland could alter ocean circulation within the cavity and change our understanding of paleo‐ice‐stream flow in the region. Also revealed are deep troughs near the grounding lines of Foundation and Support Force ice streams, which provide access for seawater with melting potential. Running an ocean tidal model with the new bathymetry reveals large differences in tidal current velocities, both within the new gridded region and further afield, potentially affecting sub‐ice‐shelf melt rates. |
format |
Article in Journal/Newspaper |
author |
Rosier, Sebastian H.R. Hofstede, C. Brisbourne, Alex M. Hattermann, T. Nicholls, Keith W. Davis, Peter E.D. Anker, Paul G.D. Hillenbrand, Claus-Dieter Smith, Andy M. Corr, Hugh F.J. |
spellingShingle |
Rosier, Sebastian H.R. Hofstede, C. Brisbourne, Alex M. Hattermann, T. Nicholls, Keith W. Davis, Peter E.D. Anker, Paul G.D. Hillenbrand, Claus-Dieter Smith, Andy M. Corr, Hugh F.J. A new bathymetry for the southeastern Filchner-Ronne Ice Shelf: implications for modern oceanographic processes and glacial history |
author_facet |
Rosier, Sebastian H.R. Hofstede, C. Brisbourne, Alex M. Hattermann, T. Nicholls, Keith W. Davis, Peter E.D. Anker, Paul G.D. Hillenbrand, Claus-Dieter Smith, Andy M. Corr, Hugh F.J. |
author_sort |
Rosier, Sebastian H.R. |
title |
A new bathymetry for the southeastern Filchner-Ronne Ice Shelf: implications for modern oceanographic processes and glacial history |
title_short |
A new bathymetry for the southeastern Filchner-Ronne Ice Shelf: implications for modern oceanographic processes and glacial history |
title_full |
A new bathymetry for the southeastern Filchner-Ronne Ice Shelf: implications for modern oceanographic processes and glacial history |
title_fullStr |
A new bathymetry for the southeastern Filchner-Ronne Ice Shelf: implications for modern oceanographic processes and glacial history |
title_full_unstemmed |
A new bathymetry for the southeastern Filchner-Ronne Ice Shelf: implications for modern oceanographic processes and glacial history |
title_sort |
new bathymetry for the southeastern filchner-ronne ice shelf: implications for modern oceanographic processes and glacial history |
publisher |
American Geophysical Union |
publishDate |
2018 |
url |
http://nora.nerc.ac.uk/id/eprint/520273/ https://nora.nerc.ac.uk/id/eprint/520273/7/Rosier-2018-A-new-bathymetry-for-the-southeaste.pdf https://doi.org/10.1029/2018JC013982 |
long_lat |
ENVELOPE(-61.000,-61.000,-78.500,-78.500) ENVELOPE(-48.117,-48.117,-79.333,-79.333) |
geographic |
Antarctic The Antarctic Weddell Sea Weddell Ronne Ice Shelf Berkner Island |
geographic_facet |
Antarctic The Antarctic Weddell Sea Weddell Ronne Ice Shelf Berkner Island |
genre |
Antarc* Antarctic Berkner Island Filchner Ronne Ice Shelf Filchner-Ronne Ice Shelf Ice Sheet Ice Shelf Ice Shelves Ronne Ice Shelf Weddell Sea |
genre_facet |
Antarc* Antarctic Berkner Island Filchner Ronne Ice Shelf Filchner-Ronne Ice Shelf Ice Sheet Ice Shelf Ice Shelves Ronne Ice Shelf Weddell Sea |
op_relation |
https://nora.nerc.ac.uk/id/eprint/520273/7/Rosier-2018-A-new-bathymetry-for-the-southeaste.pdf Rosier, Sebastian H.R. orcid:0000-0003-3047-9908 Hofstede, C.; Brisbourne, Alex M. orcid:0000-0002-9887-7120 Hattermann, T.; Nicholls, Keith W. orcid:0000-0002-2188-4509 Davis, Peter E.D. orcid:0000-0002-6471-6310 Anker, Paul G.D. orcid:0000-0002-4359-4342 Hillenbrand, Claus-Dieter orcid:0000-0003-0240-7317 Smith, Andy M. orcid:0000-0001-8577-482X Corr, Hugh F.J. 2018 A new bathymetry for the southeastern Filchner-Ronne Ice Shelf: implications for modern oceanographic processes and glacial history. Journal of Geophysical Research: Oceans, 123 (7). 4610-4623. https://doi.org/10.1029/2018JC013982 <https://doi.org/10.1029/2018JC013982> |
op_rights |
cc_by_4 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1029/2018JC013982 |
container_title |
Journal of Geophysical Research: Oceans |
container_volume |
123 |
container_issue |
7 |
container_start_page |
4610 |
op_container_end_page |
4623 |
_version_ |
1766251783458390016 |