Physical oceanography and current measurements in the Filchner Depression (Weddell Sea, Antarctica) during Ernest Shackleton cruise ES060, supplement to: Darelius, Elin; Makinson, Keith; Daae, Kjersti; Fer, Ilker; Holland, Paul; Nicholls, Keith W (2014): Hydrography and circulation in the Filchner Depression, Weddell Sea, Antarctica. Journal of Geophysical Research: Oceans, 119(9), 5797-5814

Cold and dense ice shelf water (ISW) emerging from the Filchner-Ronne Ice Shelf cavity in the southwestern Weddell Sea flows northward through the Filchner Depression to eventually descend the continental slope and contribute to the formation of bottom water. New ship-born observations of hydrograph...

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Bibliographic Details
Main Authors: Darelius, Elin, Fer, Ilker
Format: Article in Journal/Newspaper
Language:English
Published: PANGAEA - Data Publisher for Earth & Environmental Science 2015
Subjects:
Berkner Island
Filchner Ice Front
Ronne Ice Shelf
Shackleton
Weddell
Weddell Sea
Antarc*
Antarctica
Filchner Ronne Ice Shelf
Filchner-Ronne Ice Shelf
Ice Shelf
Online Access:https://dx.doi.org/10.1594/pangaea.845032
https://doi.pangaea.de/10.1594/PANGAEA.845032
Description
Summary:Cold and dense ice shelf water (ISW) emerging from the Filchner-Ronne Ice Shelf cavity in the southwestern Weddell Sea flows northward through the Filchner Depression to eventually descend the continental slope and contribute to the formation of bottom water. New ship-born observations of hydrography and currents from Filchner Depression in January 2013 suggest that the northward flow of ISW takes place in a middepth jet along the eastern flank of the depression, thus questioning the traditional view with outflow along the western flank. This interpretation of the data is supported by results from a regional numerical model, which shows that ISW flowing northward along the eastern coast of Berkner Island turns eastward and crosses the depression to its eastern side upon reaching the Filchner ice front. The ice front represents a sudden change in the thickness of the water column and thus a potential vorticity barrier. Transport estimates of northward ISW flux based on observations ranges from 0.2 to 1.0 Sv.

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