Southern Ocean pinnipeds provide bathymetric insights on the East Antarctic continental shelf

Poor coverage of the Antarctic continental shelf bathymetry impedes understanding the oceanographic processes affecting Antarctica’s role in global climate. Continental shelf bathymetry influences warm modified Circumpolar Deep Water movement onto the shelf, making it an important factor promoting i...

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Published in:Communications Earth & Environment
Main Authors: McMahon, Clive R., Hindell, Mark A., Charrassin, Jean Benoit, Coleman, Richard, Guinet, Christophe, Harcourt, Robert, Labrousse, Sara, Raymond, Benjemin, Sumner, Michael, Ribeiro, Natalia
Format: Article in Journal/Newspaper
Language:English
Published: 2023
Subjects:
Online Access:https://researchers.mq.edu.au/en/publications/a20681c7-55a4-4e02-ae40-ddcd61a54854
https://doi.org/10.1038/s43247-023-00928-w
https://research-management.mq.edu.au/ws/files/331397415/331012949.pdf
http://www.scopus.com/inward/record.url?scp=85165487543&partnerID=8YFLogxK
http://purl.org/au-research/grants/arc/DP180101667
http://purl.org/au-research/grants/arc/SR200100008
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spelling ftmacquarieunicr:oai:https://researchers.mq.edu.au:publications/a20681c7-55a4-4e02-ae40-ddcd61a54854 2024-09-30T14:24:00+00:00 Southern Ocean pinnipeds provide bathymetric insights on the East Antarctic continental shelf McMahon, Clive R. Hindell, Mark A. Charrassin, Jean Benoit Coleman, Richard Guinet, Christophe Harcourt, Robert Labrousse, Sara Raymond, Benjemin Sumner, Michael Ribeiro, Natalia 2023-07-21 application/pdf https://researchers.mq.edu.au/en/publications/a20681c7-55a4-4e02-ae40-ddcd61a54854 https://doi.org/10.1038/s43247-023-00928-w https://research-management.mq.edu.au/ws/files/331397415/331012949.pdf http://www.scopus.com/inward/record.url?scp=85165487543&partnerID=8YFLogxK http://purl.org/au-research/grants/arc/DP180101667 http://purl.org/au-research/grants/arc/SR200100008 eng eng info:eu-repo/semantics/openAccess McMahon , C R , Hindell , M A , Charrassin , J B , Coleman , R , Guinet , C , Harcourt , R , Labrousse , S , Raymond , B , Sumner , M & Ribeiro , N 2023 , ' Southern Ocean pinnipeds provide bathymetric insights on the East Antarctic continental shelf ' , Communications Earth and Environment , vol. 4 , no. 1 , 266 , pp. 1-10 . https://doi.org/10.1038/s43247-023-00928-w article 2023 ftmacquarieunicr https://doi.org/10.1038/s43247-023-00928-w 2024-09-18T23:49:11Z Poor coverage of the Antarctic continental shelf bathymetry impedes understanding the oceanographic processes affecting Antarctica’s role in global climate. Continental shelf bathymetry influences warm modified Circumpolar Deep Water movement onto the shelf, making it an important factor promoting ice shelf melting and influencing the flow of ice shelves into the ocean. Building on previous work using seal dives to redefine bathymetry, our longitudinal study of ocean physics and animal behaviour provided new depth information from over 500,000 individual seal dives on the East Antarctic continental shelf. About 25% of these seal dives were 220 m (sometimes over 1000 m) deeper than the interpolated seafloor from IBCSO V2. Focusing on four well-sampled regions, we show that the bathymetry of 22% to 60% of the sampled area was improved by incorporating seal dive data. This revealed new bathymetric features, including troughs off the Shackleton Ice Shelf and Underwood Glacier and a deep canyon near the Vanderford Glacier. This deep canyon, the Mirounga-Nuyina Canyon , was confirmed by a recent multi-beam echo sounder survey. Further acquisitions of seal data will improve our understanding and modelling of Antarctic coastal ocean processes and ice-sheet dynamics. Article in Journal/Newspaper Antarc* Antarctic Ice Sheet Ice Shelf Ice Shelves Shackleton Ice Shelf Southern Ocean Underwood Glacier Vanderford Glacier Macquarie University Research Portal Antarctic Shackleton Shackleton Ice Shelf ENVELOPE(100.504,100.504,-65.996,-65.996) Southern Ocean The Antarctic Underwood ENVELOPE(49.350,49.350,-68.133,-68.133) Underwood Glacier ENVELOPE(108.083,108.083,-66.600,-66.600) Vanderford Glacier ENVELOPE(110.433,110.433,-66.583,-66.583) Communications Earth & Environment 4 1
institution Open Polar
collection Macquarie University Research Portal
op_collection_id ftmacquarieunicr
language English
description Poor coverage of the Antarctic continental shelf bathymetry impedes understanding the oceanographic processes affecting Antarctica’s role in global climate. Continental shelf bathymetry influences warm modified Circumpolar Deep Water movement onto the shelf, making it an important factor promoting ice shelf melting and influencing the flow of ice shelves into the ocean. Building on previous work using seal dives to redefine bathymetry, our longitudinal study of ocean physics and animal behaviour provided new depth information from over 500,000 individual seal dives on the East Antarctic continental shelf. About 25% of these seal dives were 220 m (sometimes over 1000 m) deeper than the interpolated seafloor from IBCSO V2. Focusing on four well-sampled regions, we show that the bathymetry of 22% to 60% of the sampled area was improved by incorporating seal dive data. This revealed new bathymetric features, including troughs off the Shackleton Ice Shelf and Underwood Glacier and a deep canyon near the Vanderford Glacier. This deep canyon, the Mirounga-Nuyina Canyon , was confirmed by a recent multi-beam echo sounder survey. Further acquisitions of seal data will improve our understanding and modelling of Antarctic coastal ocean processes and ice-sheet dynamics.
format Article in Journal/Newspaper
author McMahon, Clive R.
Hindell, Mark A.
Charrassin, Jean Benoit
Coleman, Richard
Guinet, Christophe
Harcourt, Robert
Labrousse, Sara
Raymond, Benjemin
Sumner, Michael
Ribeiro, Natalia
spellingShingle McMahon, Clive R.
Hindell, Mark A.
Charrassin, Jean Benoit
Coleman, Richard
Guinet, Christophe
Harcourt, Robert
Labrousse, Sara
Raymond, Benjemin
Sumner, Michael
Ribeiro, Natalia
Southern Ocean pinnipeds provide bathymetric insights on the East Antarctic continental shelf
author_facet McMahon, Clive R.
Hindell, Mark A.
Charrassin, Jean Benoit
Coleman, Richard
Guinet, Christophe
Harcourt, Robert
Labrousse, Sara
Raymond, Benjemin
Sumner, Michael
Ribeiro, Natalia
author_sort McMahon, Clive R.
title Southern Ocean pinnipeds provide bathymetric insights on the East Antarctic continental shelf
title_short Southern Ocean pinnipeds provide bathymetric insights on the East Antarctic continental shelf
title_full Southern Ocean pinnipeds provide bathymetric insights on the East Antarctic continental shelf
title_fullStr Southern Ocean pinnipeds provide bathymetric insights on the East Antarctic continental shelf
title_full_unstemmed Southern Ocean pinnipeds provide bathymetric insights on the East Antarctic continental shelf
title_sort southern ocean pinnipeds provide bathymetric insights on the east antarctic continental shelf
publishDate 2023
url https://researchers.mq.edu.au/en/publications/a20681c7-55a4-4e02-ae40-ddcd61a54854
https://doi.org/10.1038/s43247-023-00928-w
https://research-management.mq.edu.au/ws/files/331397415/331012949.pdf
http://www.scopus.com/inward/record.url?scp=85165487543&partnerID=8YFLogxK
http://purl.org/au-research/grants/arc/DP180101667
http://purl.org/au-research/grants/arc/SR200100008
long_lat ENVELOPE(100.504,100.504,-65.996,-65.996)
ENVELOPE(49.350,49.350,-68.133,-68.133)
ENVELOPE(108.083,108.083,-66.600,-66.600)
ENVELOPE(110.433,110.433,-66.583,-66.583)
geographic Antarctic
Shackleton
Shackleton Ice Shelf
Southern Ocean
The Antarctic
Underwood
Underwood Glacier
Vanderford Glacier
geographic_facet Antarctic
Shackleton
Shackleton Ice Shelf
Southern Ocean
The Antarctic
Underwood
Underwood Glacier
Vanderford Glacier
genre Antarc*
Antarctic
Ice Sheet
Ice Shelf
Ice Shelves
Shackleton Ice Shelf
Southern Ocean
Underwood Glacier
Vanderford Glacier
genre_facet Antarc*
Antarctic
Ice Sheet
Ice Shelf
Ice Shelves
Shackleton Ice Shelf
Southern Ocean
Underwood Glacier
Vanderford Glacier
op_source McMahon , C R , Hindell , M A , Charrassin , J B , Coleman , R , Guinet , C , Harcourt , R , Labrousse , S , Raymond , B , Sumner , M & Ribeiro , N 2023 , ' Southern Ocean pinnipeds provide bathymetric insights on the East Antarctic continental shelf ' , Communications Earth and Environment , vol. 4 , no. 1 , 266 , pp. 1-10 . https://doi.org/10.1038/s43247-023-00928-w
op_rights info:eu-repo/semantics/openAccess
op_doi https://doi.org/10.1038/s43247-023-00928-w
container_title Communications Earth & Environment
container_volume 4
container_issue 1
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