Seasonal Outflow of Ice Shelf Water Across the Front of the Filchner Ice Shelf, Weddell Sea, Antarctica
The ice shelf water (ISW) found in the Filchner Trough, located in the southern Weddell Sea, Antarctica, is climatically important; it descends into the deep Weddell Sea contributing to bottom water formation, and it blocks warm off‐shelf waters from accessing the Filchner ice shelf cavity. Yet the...
Published in: | Geophysical Research Letters |
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Language: | English |
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American Geophysical Union
2018
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Online Access: | https://hdl.handle.net/1956/18852 https://doi.org/10.1002/2017gl076320 |
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ftunivbergen:oai:bora.uib.no:1956/18852 2023-05-15T13:43:41+02:00 Seasonal Outflow of Ice Shelf Water Across the Front of the Filchner Ice Shelf, Weddell Sea, Antarctica Darelius, Elin Maria K. Sallee, Jean-Bapiste 2018-04-30T06:26:33Z application/pdf https://hdl.handle.net/1956/18852 https://doi.org/10.1002/2017gl076320 eng eng American Geophysical Union Norges forskningsråd: 231549 urn:issn:1944-8007 urn:issn:0094-8276 https://hdl.handle.net/1956/18852 https://doi.org/10.1002/2017gl076320 cristin:1582397 Attribution CC BY http://creativecommons.org/licenses/by/4.0 Copyright 2018 The Author(s) Geophysical Research Letters Peer reviewed Journal article 2018 ftunivbergen https://doi.org/10.1002/2017gl076320 2023-03-14T17:44:28Z The ice shelf water (ISW) found in the Filchner Trough, located in the southern Weddell Sea, Antarctica, is climatically important; it descends into the deep Weddell Sea contributing to bottom water formation, and it blocks warm off‐shelf waters from accessing the Filchner ice shelf cavity. Yet the circulation of ISW within the Filchner Trough and the processes determining its exchange across the ice shelf front are to a large degree unknown. Here mooring records from the ice shelf front are presented, the longest of which is 4 years long. They show that the coldest (Θ =− 2.3∘C) ISW, which originates from the Ronne Trough in the west, exits the cavity across the western part of the ice shelf front during late austral summer and early autumn. The supercooled ISW escaping the cavity flows northward with a velocity of about 0.03 m/s. During the rest of the year, there is no outflow at the western site: the current is directed eastward, parallel to the ice shelf front, and the temperatures at the mooring site are slightly higher (Θ =− 2.0∘C). The eastern records show a more persistent outflow of ISW. publishedVersion Article in Journal/Newspaper Antarc* Antarctica Ice Shelf Weddell Sea University of Bergen: Bergen Open Research Archive (BORA-UiB) Austral Filchner Ice Shelf ENVELOPE(-40.000,-40.000,-79.000,-79.000) Filchner Trough ENVELOPE(-36.000,-36.000,-77.000,-77.000) Weddell Weddell Sea Geophysical Research Letters 45 8 3577 3585 |
institution |
Open Polar |
collection |
University of Bergen: Bergen Open Research Archive (BORA-UiB) |
op_collection_id |
ftunivbergen |
language |
English |
description |
The ice shelf water (ISW) found in the Filchner Trough, located in the southern Weddell Sea, Antarctica, is climatically important; it descends into the deep Weddell Sea contributing to bottom water formation, and it blocks warm off‐shelf waters from accessing the Filchner ice shelf cavity. Yet the circulation of ISW within the Filchner Trough and the processes determining its exchange across the ice shelf front are to a large degree unknown. Here mooring records from the ice shelf front are presented, the longest of which is 4 years long. They show that the coldest (Θ =− 2.3∘C) ISW, which originates from the Ronne Trough in the west, exits the cavity across the western part of the ice shelf front during late austral summer and early autumn. The supercooled ISW escaping the cavity flows northward with a velocity of about 0.03 m/s. During the rest of the year, there is no outflow at the western site: the current is directed eastward, parallel to the ice shelf front, and the temperatures at the mooring site are slightly higher (Θ =− 2.0∘C). The eastern records show a more persistent outflow of ISW. publishedVersion |
format |
Article in Journal/Newspaper |
author |
Darelius, Elin Maria K. Sallee, Jean-Bapiste |
spellingShingle |
Darelius, Elin Maria K. Sallee, Jean-Bapiste Seasonal Outflow of Ice Shelf Water Across the Front of the Filchner Ice Shelf, Weddell Sea, Antarctica |
author_facet |
Darelius, Elin Maria K. Sallee, Jean-Bapiste |
author_sort |
Darelius, Elin Maria K. |
title |
Seasonal Outflow of Ice Shelf Water Across the Front of the Filchner Ice Shelf, Weddell Sea, Antarctica |
title_short |
Seasonal Outflow of Ice Shelf Water Across the Front of the Filchner Ice Shelf, Weddell Sea, Antarctica |
title_full |
Seasonal Outflow of Ice Shelf Water Across the Front of the Filchner Ice Shelf, Weddell Sea, Antarctica |
title_fullStr |
Seasonal Outflow of Ice Shelf Water Across the Front of the Filchner Ice Shelf, Weddell Sea, Antarctica |
title_full_unstemmed |
Seasonal Outflow of Ice Shelf Water Across the Front of the Filchner Ice Shelf, Weddell Sea, Antarctica |
title_sort |
seasonal outflow of ice shelf water across the front of the filchner ice shelf, weddell sea, antarctica |
publisher |
American Geophysical Union |
publishDate |
2018 |
url |
https://hdl.handle.net/1956/18852 https://doi.org/10.1002/2017gl076320 |
long_lat |
ENVELOPE(-40.000,-40.000,-79.000,-79.000) ENVELOPE(-36.000,-36.000,-77.000,-77.000) |
geographic |
Austral Filchner Ice Shelf Filchner Trough Weddell Weddell Sea |
geographic_facet |
Austral Filchner Ice Shelf Filchner Trough Weddell Weddell Sea |
genre |
Antarc* Antarctica Ice Shelf Weddell Sea |
genre_facet |
Antarc* Antarctica Ice Shelf Weddell Sea |
op_source |
Geophysical Research Letters |
op_relation |
Norges forskningsråd: 231549 urn:issn:1944-8007 urn:issn:0094-8276 https://hdl.handle.net/1956/18852 https://doi.org/10.1002/2017gl076320 cristin:1582397 |
op_rights |
Attribution CC BY http://creativecommons.org/licenses/by/4.0 Copyright 2018 The Author(s) |
op_doi |
https://doi.org/10.1002/2017gl076320 |
container_title |
Geophysical Research Letters |
container_volume |
45 |
container_issue |
8 |
container_start_page |
3577 |
op_container_end_page |
3585 |
_version_ |
1766192024203034624 |