Southern Ocean pinnipeds provide bathymetric insights on the East Antarctic continental shelf
Abstract 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 pr...
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ftdoajarticles:oai:doaj.org/article:550974a6c52c4ecaad7ff7e04a518b4f 2023-08-20T04:02:27+02:00 Southern Ocean pinnipeds provide bathymetric insights on the East Antarctic continental shelf Clive R. McMahon Mark A. Hindell Jean Benoit Charrassin Richard Coleman Christophe. Guinet Robert Harcourt Sara Labrousse Benjemin Raymond Michael Sumner Natalia Ribeiro 2023-07-01T00:00:00Z https://doi.org/10.1038/s43247-023-00928-w https://doaj.org/article/550974a6c52c4ecaad7ff7e04a518b4f EN eng Nature Portfolio https://doi.org/10.1038/s43247-023-00928-w https://doaj.org/toc/2662-4435 doi:10.1038/s43247-023-00928-w 2662-4435 https://doaj.org/article/550974a6c52c4ecaad7ff7e04a518b4f Communications Earth & Environment, Vol 4, Iss 1, Pp 1-10 (2023) Geology QE1-996.5 Environmental sciences GE1-350 article 2023 ftdoajarticles https://doi.org/10.1038/s43247-023-00928-w 2023-07-30T00:39:47Z Abstract 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 Directory of Open Access Journals: DOAJ Articles 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 |
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Open Polar |
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Directory of Open Access Journals: DOAJ Articles |
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ftdoajarticles |
language |
English |
topic |
Geology QE1-996.5 Environmental sciences GE1-350 |
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Geology QE1-996.5 Environmental sciences GE1-350 Clive R. McMahon Mark A. Hindell Jean Benoit Charrassin Richard Coleman Christophe. Guinet Robert Harcourt Sara Labrousse Benjemin Raymond Michael Sumner Natalia Ribeiro Southern Ocean pinnipeds provide bathymetric insights on the East Antarctic continental shelf |
topic_facet |
Geology QE1-996.5 Environmental sciences GE1-350 |
description |
Abstract 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 |
Clive R. McMahon Mark A. Hindell Jean Benoit Charrassin Richard Coleman Christophe. Guinet Robert Harcourt Sara Labrousse Benjemin Raymond Michael Sumner Natalia Ribeiro |
author_facet |
Clive R. McMahon Mark A. Hindell Jean Benoit Charrassin Richard Coleman Christophe. Guinet Robert Harcourt Sara Labrousse Benjemin Raymond Michael Sumner Natalia Ribeiro |
author_sort |
Clive R. McMahon |
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 |
publisher |
Nature Portfolio |
publishDate |
2023 |
url |
https://doi.org/10.1038/s43247-023-00928-w https://doaj.org/article/550974a6c52c4ecaad7ff7e04a518b4f |
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 |
Communications Earth & Environment, Vol 4, Iss 1, Pp 1-10 (2023) |
op_relation |
https://doi.org/10.1038/s43247-023-00928-w https://doaj.org/toc/2662-4435 doi:10.1038/s43247-023-00928-w 2662-4435 https://doaj.org/article/550974a6c52c4ecaad7ff7e04a518b4f |
op_doi |
https://doi.org/10.1038/s43247-023-00928-w |
container_title |
Communications Earth & Environment |
container_volume |
4 |
container_issue |
1 |
_version_ |
1774712899375202304 |