Water masses distribution offshore the Sabrina Coast (East Antarctica)
Current glacier melt rates in West Antarctica substantially exceed those around the East Antarctic margin. The exception is Wilkes Land, where for example Totten Glacier underwent significant retreat between 2000 and 2012, underlining its sensitivity to climate change. This process is strongly influ...
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2022
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ftunivtasmania:oai:eprints.utas.edu.au:46375 2023-05-15T13:43:28+02:00 Water masses distribution offshore the Sabrina Coast (East Antarctica) Bensi, M Kovacevic, V Donda, F O'Brien, PE Armbrecht, L Armand, LK 2022 application/pdf https://eprints.utas.edu.au/46375/ https://eprints.utas.edu.au/46375/1/148647%20-%20Water%20masses%20distribution%20offshore%20the%20Sabrina%20Coast.pdf en eng Copernicus GmbH https://eprints.utas.edu.au/46375/1/148647%20-%20Water%20masses%20distribution%20offshore%20the%20Sabrina%20Coast.pdf Bensi, M, Kovacevic, V, Donda, F, O'Brien, PE, Armbrecht, L orcid:0000-0002-1213-1257 and Armand, LK 2022 , 'Water masses distribution offshore the Sabrina Coast (East Antarctica)' , Earth System Science Data, vol. 14, no. 1 , pp. 65-78 , doi:10.5194/essd-14-65-2022 <http://dx.doi.org/10.5194/essd-14-65-2022>. Sabrina Coast Totten Glacier East Antarctica climate change ice retreat Article PeerReviewed 2022 ftunivtasmania https://doi.org/10.5194/essd-14-65-2022 2022-07-04T22:16:37Z Current glacier melt rates in West Antarctica substantially exceed those around the East Antarctic margin. The exception is Wilkes Land, where for example Totten Glacier underwent significant retreat between 2000 and 2012, underlining its sensitivity to climate change. This process is strongly influenced by ocean dynamics, which in turn changes in accordance with the evolution of the ice caps. Here, we present new oceanographic data (temperature, salinity, and dissolved oxygen) collected during austral summer 2017 offshore the Sabrina Coast (East Antarctica) from the continental shelf break to ca 3000 m depth. This area is characterized by very few oceanographic in situ observations. The main water masses of the study area, identified by analysing thermohaline properties, are the Antarctic Surface Water with potential temperature ∘C and salinity S0 ∘C and S>34.5 (σθ>27.7 kg m−3), and Antarctic Bottom Water with ∘C and (; neutral density γn>28.30 kg m−3). The latter is a mixture of dense waters from the Ross Sea and Adélie Land continental shelves. Such waters are influenced by the mixing processes they undergo as they move westward along the Antarctic margin, also interacting with the warmer Circumpolar Deep Water. The spatial distribution of water masses offshore the Sabrina Coast also appears to be strongly linked with the complex morpho-bathymetry of the slope and rise area, supporting the hypothesis that downslope processes contribute to shaping the architecture of the distal portion of the continental margin. Article in Journal/Newspaper Antarc* Antarctic Antarctica East Antarctica Ross Sea Totten Glacier West Antarctica Wilkes Land University of Tasmania: UTas ePrints Antarctic The Antarctic East Antarctica Austral Ross Sea West Antarctica Wilkes Land ENVELOPE(120.000,120.000,-69.000,-69.000) Totten Glacier ENVELOPE(116.333,116.333,-66.833,-66.833) Sabrina Coast ENVELOPE(118.550,118.550,-67.000,-67.000) Earth System Science Data 14 1 65 78 |
institution |
Open Polar |
collection |
University of Tasmania: UTas ePrints |
op_collection_id |
ftunivtasmania |
language |
English |
topic |
Sabrina Coast Totten Glacier East Antarctica climate change ice retreat |
spellingShingle |
Sabrina Coast Totten Glacier East Antarctica climate change ice retreat Bensi, M Kovacevic, V Donda, F O'Brien, PE Armbrecht, L Armand, LK Water masses distribution offshore the Sabrina Coast (East Antarctica) |
topic_facet |
Sabrina Coast Totten Glacier East Antarctica climate change ice retreat |
description |
Current glacier melt rates in West Antarctica substantially exceed those around the East Antarctic margin. The exception is Wilkes Land, where for example Totten Glacier underwent significant retreat between 2000 and 2012, underlining its sensitivity to climate change. This process is strongly influenced by ocean dynamics, which in turn changes in accordance with the evolution of the ice caps. Here, we present new oceanographic data (temperature, salinity, and dissolved oxygen) collected during austral summer 2017 offshore the Sabrina Coast (East Antarctica) from the continental shelf break to ca 3000 m depth. This area is characterized by very few oceanographic in situ observations. The main water masses of the study area, identified by analysing thermohaline properties, are the Antarctic Surface Water with potential temperature ∘C and salinity S0 ∘C and S>34.5 (σθ>27.7 kg m−3), and Antarctic Bottom Water with ∘C and (; neutral density γn>28.30 kg m−3). The latter is a mixture of dense waters from the Ross Sea and Adélie Land continental shelves. Such waters are influenced by the mixing processes they undergo as they move westward along the Antarctic margin, also interacting with the warmer Circumpolar Deep Water. The spatial distribution of water masses offshore the Sabrina Coast also appears to be strongly linked with the complex morpho-bathymetry of the slope and rise area, supporting the hypothesis that downslope processes contribute to shaping the architecture of the distal portion of the continental margin. |
format |
Article in Journal/Newspaper |
author |
Bensi, M Kovacevic, V Donda, F O'Brien, PE Armbrecht, L Armand, LK |
author_facet |
Bensi, M Kovacevic, V Donda, F O'Brien, PE Armbrecht, L Armand, LK |
author_sort |
Bensi, M |
title |
Water masses distribution offshore the Sabrina Coast (East Antarctica) |
title_short |
Water masses distribution offshore the Sabrina Coast (East Antarctica) |
title_full |
Water masses distribution offshore the Sabrina Coast (East Antarctica) |
title_fullStr |
Water masses distribution offshore the Sabrina Coast (East Antarctica) |
title_full_unstemmed |
Water masses distribution offshore the Sabrina Coast (East Antarctica) |
title_sort |
water masses distribution offshore the sabrina coast (east antarctica) |
publisher |
Copernicus GmbH |
publishDate |
2022 |
url |
https://eprints.utas.edu.au/46375/ https://eprints.utas.edu.au/46375/1/148647%20-%20Water%20masses%20distribution%20offshore%20the%20Sabrina%20Coast.pdf |
long_lat |
ENVELOPE(120.000,120.000,-69.000,-69.000) ENVELOPE(116.333,116.333,-66.833,-66.833) ENVELOPE(118.550,118.550,-67.000,-67.000) |
geographic |
Antarctic The Antarctic East Antarctica Austral Ross Sea West Antarctica Wilkes Land Totten Glacier Sabrina Coast |
geographic_facet |
Antarctic The Antarctic East Antarctica Austral Ross Sea West Antarctica Wilkes Land Totten Glacier Sabrina Coast |
genre |
Antarc* Antarctic Antarctica East Antarctica Ross Sea Totten Glacier West Antarctica Wilkes Land |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica Ross Sea Totten Glacier West Antarctica Wilkes Land |
op_relation |
https://eprints.utas.edu.au/46375/1/148647%20-%20Water%20masses%20distribution%20offshore%20the%20Sabrina%20Coast.pdf Bensi, M, Kovacevic, V, Donda, F, O'Brien, PE, Armbrecht, L orcid:0000-0002-1213-1257 and Armand, LK 2022 , 'Water masses distribution offshore the Sabrina Coast (East Antarctica)' , Earth System Science Data, vol. 14, no. 1 , pp. 65-78 , doi:10.5194/essd-14-65-2022 <http://dx.doi.org/10.5194/essd-14-65-2022>. |
op_doi |
https://doi.org/10.5194/essd-14-65-2022 |
container_title |
Earth System Science Data |
container_volume |
14 |
container_issue |
1 |
container_start_page |
65 |
op_container_end_page |
78 |
_version_ |
1766189259295817728 |