Subsurface floats in the Filchner Trough provide first direct under-ice tracks of eddies and circulation on shelf
Bottom water formation in the Weddell Sea and mass loss from the Filchner-Ronne Ice Shelf are tightly linked by the supply of Warm Deep Water to the continental shelf. Heavy sea ice cover and icebergs restrict ship access and upper ocean measurements by moorings, compelling us to try new sampling me...
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Format: | Article in Journal/Newspaper |
Language: | English |
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Copernicus Publications
2023
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Online Access: | https://doi.org/10.5194/egusphere-2023-2952 https://noa.gwlb.de/receive/cop_mods_00070392 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00068741/egusphere-2023-2952.pdf https://egusphere.copernicus.org/preprints/2023/egusphere-2023-2952/egusphere-2023-2952.pdf |
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00070392 2024-01-14T10:05:55+01:00 Subsurface floats in the Filchner Trough provide first direct under-ice tracks of eddies and circulation on shelf Sallée, Jean-Baptiste Vignes, Lucie Minière, Audrey Steiger, Nadine Pauthenet, Etienne Lourenco, Antonio Speer, Kevin Lazarevich, Peter Nicholls, Keith 2023-12 electronic https://doi.org/10.5194/egusphere-2023-2952 https://noa.gwlb.de/receive/cop_mods_00070392 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00068741/egusphere-2023-2952.pdf https://egusphere.copernicus.org/preprints/2023/egusphere-2023-2952/egusphere-2023-2952.pdf eng eng Copernicus Publications https://doi.org/10.5194/egusphere-2023-2952 https://noa.gwlb.de/receive/cop_mods_00070392 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00068741/egusphere-2023-2952.pdf https://egusphere.copernicus.org/preprints/2023/egusphere-2023-2952/egusphere-2023-2952.pdf https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2023 ftnonlinearchiv https://doi.org/10.5194/egusphere-2023-2952 2023-12-18T00:22:48Z Bottom water formation in the Weddell Sea and mass loss from the Filchner-Ronne Ice Shelf are tightly linked by the supply of Warm Deep Water to the continental shelf. Heavy sea ice cover and icebergs restrict ship access and upper ocean measurements by moorings, compelling us to try new sampling methods. We present results from the first dedicated under-sea-ice float experiment tracking circulation on the continental shelf between the Brunt Ice Shelf and Filchner Ice Shelf. Seven Apex profiling floats were deployed in 2017 at three different locations, targeting the sources of modified Warm Deep Water (mWDW) inflow and Ice Shelf Water (ISW) circulation in the Filchner Trough. The floats capture a warm mWDW regime with southward inflow over the eastern continental shelf and a cold ISW regime with a recirculation of ISW in the Filchner Trough throughout the four years of observations. The mWDW flowing onto the continental shelf follows two pathways: the eastern flank of the Filchner Trough and via a Small Trough on the shallow shelf farther east. In the present circulation regime, this warm water is blocked from reaching the ice shelf cavity due to the presence of the thick ISW layer inside the Filchner Trough. The floats' trajectories and hydrography reveal the dynamically active front, flow reversal, and eddy generation between these two water masses along the eastern flank of the Filchner Trough. Article in Journal/Newspaper Brunt Ice Shelf Filchner Ronne Ice Shelf Filchner-Ronne Ice Shelf Ice Shelf Ronne Ice Shelf Sea ice Weddell Sea Niedersächsisches Online-Archiv NOA Weddell Sea Weddell Ronne Ice Shelf ENVELOPE(-61.000,-61.000,-78.500,-78.500) Filchner Trough ENVELOPE(-36.000,-36.000,-77.000,-77.000) Filchner Ice Shelf ENVELOPE(-40.000,-40.000,-79.000,-79.000) Brunt Ice Shelf ENVELOPE(-22.500,-22.500,-74.750,-74.750) |
institution |
Open Polar |
collection |
Niedersächsisches Online-Archiv NOA |
op_collection_id |
ftnonlinearchiv |
language |
English |
topic |
article Verlagsveröffentlichung |
spellingShingle |
article Verlagsveröffentlichung Sallée, Jean-Baptiste Vignes, Lucie Minière, Audrey Steiger, Nadine Pauthenet, Etienne Lourenco, Antonio Speer, Kevin Lazarevich, Peter Nicholls, Keith Subsurface floats in the Filchner Trough provide first direct under-ice tracks of eddies and circulation on shelf |
topic_facet |
article Verlagsveröffentlichung |
description |
Bottom water formation in the Weddell Sea and mass loss from the Filchner-Ronne Ice Shelf are tightly linked by the supply of Warm Deep Water to the continental shelf. Heavy sea ice cover and icebergs restrict ship access and upper ocean measurements by moorings, compelling us to try new sampling methods. We present results from the first dedicated under-sea-ice float experiment tracking circulation on the continental shelf between the Brunt Ice Shelf and Filchner Ice Shelf. Seven Apex profiling floats were deployed in 2017 at three different locations, targeting the sources of modified Warm Deep Water (mWDW) inflow and Ice Shelf Water (ISW) circulation in the Filchner Trough. The floats capture a warm mWDW regime with southward inflow over the eastern continental shelf and a cold ISW regime with a recirculation of ISW in the Filchner Trough throughout the four years of observations. The mWDW flowing onto the continental shelf follows two pathways: the eastern flank of the Filchner Trough and via a Small Trough on the shallow shelf farther east. In the present circulation regime, this warm water is blocked from reaching the ice shelf cavity due to the presence of the thick ISW layer inside the Filchner Trough. The floats' trajectories and hydrography reveal the dynamically active front, flow reversal, and eddy generation between these two water masses along the eastern flank of the Filchner Trough. |
format |
Article in Journal/Newspaper |
author |
Sallée, Jean-Baptiste Vignes, Lucie Minière, Audrey Steiger, Nadine Pauthenet, Etienne Lourenco, Antonio Speer, Kevin Lazarevich, Peter Nicholls, Keith |
author_facet |
Sallée, Jean-Baptiste Vignes, Lucie Minière, Audrey Steiger, Nadine Pauthenet, Etienne Lourenco, Antonio Speer, Kevin Lazarevich, Peter Nicholls, Keith |
author_sort |
Sallée, Jean-Baptiste |
title |
Subsurface floats in the Filchner Trough provide first direct under-ice tracks of eddies and circulation on shelf |
title_short |
Subsurface floats in the Filchner Trough provide first direct under-ice tracks of eddies and circulation on shelf |
title_full |
Subsurface floats in the Filchner Trough provide first direct under-ice tracks of eddies and circulation on shelf |
title_fullStr |
Subsurface floats in the Filchner Trough provide first direct under-ice tracks of eddies and circulation on shelf |
title_full_unstemmed |
Subsurface floats in the Filchner Trough provide first direct under-ice tracks of eddies and circulation on shelf |
title_sort |
subsurface floats in the filchner trough provide first direct under-ice tracks of eddies and circulation on shelf |
publisher |
Copernicus Publications |
publishDate |
2023 |
url |
https://doi.org/10.5194/egusphere-2023-2952 https://noa.gwlb.de/receive/cop_mods_00070392 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00068741/egusphere-2023-2952.pdf https://egusphere.copernicus.org/preprints/2023/egusphere-2023-2952/egusphere-2023-2952.pdf |
long_lat |
ENVELOPE(-61.000,-61.000,-78.500,-78.500) ENVELOPE(-36.000,-36.000,-77.000,-77.000) ENVELOPE(-40.000,-40.000,-79.000,-79.000) ENVELOPE(-22.500,-22.500,-74.750,-74.750) |
geographic |
Weddell Sea Weddell Ronne Ice Shelf Filchner Trough Filchner Ice Shelf Brunt Ice Shelf |
geographic_facet |
Weddell Sea Weddell Ronne Ice Shelf Filchner Trough Filchner Ice Shelf Brunt Ice Shelf |
genre |
Brunt Ice Shelf Filchner Ronne Ice Shelf Filchner-Ronne Ice Shelf Ice Shelf Ronne Ice Shelf Sea ice Weddell Sea |
genre_facet |
Brunt Ice Shelf Filchner Ronne Ice Shelf Filchner-Ronne Ice Shelf Ice Shelf Ronne Ice Shelf Sea ice Weddell Sea |
op_relation |
https://doi.org/10.5194/egusphere-2023-2952 https://noa.gwlb.de/receive/cop_mods_00070392 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00068741/egusphere-2023-2952.pdf https://egusphere.copernicus.org/preprints/2023/egusphere-2023-2952/egusphere-2023-2952.pdf |
op_rights |
https://creativecommons.org/licenses/by/4.0/ uneingeschränkt info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/egusphere-2023-2952 |
_version_ |
1788060236622331904 |