Seasonal cycle of hydrography on the eastern shelf of the Filchner Trough, Weddell Sea, Antarctica
New two-year long records from three moorings, located at 76°S along the eastern flank and shelf of the Filchner Trough, give insight in the seasonal cycle of hydrography to a region where Modified Warm Deep Water (MWDW) enters the southern Weddell Sea continental shelf, possibly reaching the Filchn...
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Online Access: | https://epic.awi.de/id/eprint/45293/ https://hdl.handle.net/10013/epic.51805 |
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ftawi:oai:epic.awi.de:45293 2023-05-15T13:45:21+02:00 Seasonal cycle of hydrography on the eastern shelf of the Filchner Trough, Weddell Sea, Antarctica Ryan, Svenja Hattermann, Tore Darelius, Elin Schröder, Michael 2017-08-18 https://epic.awi.de/id/eprint/45293/ https://hdl.handle.net/10013/epic.51805 unknown Wiley Ryan, S. orcid:0000-0001-9427-2127 , Hattermann, T. , Darelius, E. and Schröder, M. (2017) Seasonal cycle of hydrography on the eastern shelf of the Filchner Trough, Weddell Sea, Antarctica , Journal of Geophysical Research-Oceans, 122 (8), pp. 6437-6453 . doi:10.1002/2017JC012916 <https://doi.org/10.1002/2017JC012916> , hdl:10013/epic.51805 EPIC3Journal of Geophysical Research-Oceans, Wiley, 122(8), pp. 6437-6453, ISSN: 0148-0227 Article peerRev 2017 ftawi https://doi.org/10.1002/2017JC012916 2021-12-24T15:43:11Z New two-year long records from three moorings, located at 76°S along the eastern flank and shelf of the Filchner Trough, give insight in the seasonal cycle of hydrography to a region where Modified Warm Deep Water (MWDW) enters the southern Weddell Sea continental shelf, possibly reaching the Filchner Ronne Ice Shelf, the biggest ice shelf (by volume) in Antarctica. A persistent northward flow of Ice Shelf Water (ISW) is found along the slope of the trough at 600 m depth, while the data on the shelf indicate a seasonal cycle, characterized by four phases. A distinct warm inflow period (separated in two phases), with maximum temperatures of −1°C, appears to be related to the seasonal heaving of the Antarctic Slope Front thermocline along the continental shelf break further north and a seasonal extension of the ISW layer onto the Eastern Shelf. The density gradients between the ISW in the trough and the MWDW on the adjacent shelf drive the southward flow during these phases. A flow reversal is found in winter, ceasing the southward flow along the eastern flank of the trough. Weaker density gradients between the trough and the shelf during winter allow a westward flow, partly driven by a N-S density gradient, existing across the Eastern Shelf during this time. From spring through to summer the ISW layer in the trough extends onto the eastern shelf where it occupies the bottom layer at our moorings and it is associated with northward flow. Article in Journal/Newspaper Antarc* Antarctic Antarctica Antarctica Journal Filchner Ronne Ice Shelf Filchner-Ronne Ice Shelf Ice Shelf Ronne Ice Shelf Weddell Sea Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Antarctic Filchner Trough ENVELOPE(-36.000,-36.000,-77.000,-77.000) Ronne Ice Shelf ENVELOPE(-61.000,-61.000,-78.500,-78.500) The Antarctic Weddell Weddell Sea Journal of Geophysical Research: Oceans 122 8 6437 6453 |
institution |
Open Polar |
collection |
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
description |
New two-year long records from three moorings, located at 76°S along the eastern flank and shelf of the Filchner Trough, give insight in the seasonal cycle of hydrography to a region where Modified Warm Deep Water (MWDW) enters the southern Weddell Sea continental shelf, possibly reaching the Filchner Ronne Ice Shelf, the biggest ice shelf (by volume) in Antarctica. A persistent northward flow of Ice Shelf Water (ISW) is found along the slope of the trough at 600 m depth, while the data on the shelf indicate a seasonal cycle, characterized by four phases. A distinct warm inflow period (separated in two phases), with maximum temperatures of −1°C, appears to be related to the seasonal heaving of the Antarctic Slope Front thermocline along the continental shelf break further north and a seasonal extension of the ISW layer onto the Eastern Shelf. The density gradients between the ISW in the trough and the MWDW on the adjacent shelf drive the southward flow during these phases. A flow reversal is found in winter, ceasing the southward flow along the eastern flank of the trough. Weaker density gradients between the trough and the shelf during winter allow a westward flow, partly driven by a N-S density gradient, existing across the Eastern Shelf during this time. From spring through to summer the ISW layer in the trough extends onto the eastern shelf where it occupies the bottom layer at our moorings and it is associated with northward flow. |
format |
Article in Journal/Newspaper |
author |
Ryan, Svenja Hattermann, Tore Darelius, Elin Schröder, Michael |
spellingShingle |
Ryan, Svenja Hattermann, Tore Darelius, Elin Schröder, Michael Seasonal cycle of hydrography on the eastern shelf of the Filchner Trough, Weddell Sea, Antarctica |
author_facet |
Ryan, Svenja Hattermann, Tore Darelius, Elin Schröder, Michael |
author_sort |
Ryan, Svenja |
title |
Seasonal cycle of hydrography on the eastern shelf of the Filchner Trough, Weddell Sea, Antarctica |
title_short |
Seasonal cycle of hydrography on the eastern shelf of the Filchner Trough, Weddell Sea, Antarctica |
title_full |
Seasonal cycle of hydrography on the eastern shelf of the Filchner Trough, Weddell Sea, Antarctica |
title_fullStr |
Seasonal cycle of hydrography on the eastern shelf of the Filchner Trough, Weddell Sea, Antarctica |
title_full_unstemmed |
Seasonal cycle of hydrography on the eastern shelf of the Filchner Trough, Weddell Sea, Antarctica |
title_sort |
seasonal cycle of hydrography on the eastern shelf of the filchner trough, weddell sea, antarctica |
publisher |
Wiley |
publishDate |
2017 |
url |
https://epic.awi.de/id/eprint/45293/ https://hdl.handle.net/10013/epic.51805 |
long_lat |
ENVELOPE(-36.000,-36.000,-77.000,-77.000) ENVELOPE(-61.000,-61.000,-78.500,-78.500) |
geographic |
Antarctic Filchner Trough Ronne Ice Shelf The Antarctic Weddell Weddell Sea |
geographic_facet |
Antarctic Filchner Trough Ronne Ice Shelf The Antarctic Weddell Weddell Sea |
genre |
Antarc* Antarctic Antarctica Antarctica Journal Filchner Ronne Ice Shelf Filchner-Ronne Ice Shelf Ice Shelf Ronne Ice Shelf Weddell Sea |
genre_facet |
Antarc* Antarctic Antarctica Antarctica Journal Filchner Ronne Ice Shelf Filchner-Ronne Ice Shelf Ice Shelf Ronne Ice Shelf Weddell Sea |
op_source |
EPIC3Journal of Geophysical Research-Oceans, Wiley, 122(8), pp. 6437-6453, ISSN: 0148-0227 |
op_relation |
Ryan, S. orcid:0000-0001-9427-2127 , Hattermann, T. , Darelius, E. and Schröder, M. (2017) Seasonal cycle of hydrography on the eastern shelf of the Filchner Trough, Weddell Sea, Antarctica , Journal of Geophysical Research-Oceans, 122 (8), pp. 6437-6453 . doi:10.1002/2017JC012916 <https://doi.org/10.1002/2017JC012916> , hdl:10013/epic.51805 |
op_doi |
https://doi.org/10.1002/2017JC012916 |
container_title |
Journal of Geophysical Research: Oceans |
container_volume |
122 |
container_issue |
8 |
container_start_page |
6437 |
op_container_end_page |
6453 |
_version_ |
1766220928484638720 |