Russian Journal of Earth Sciences Russian Journal of Earth Sciences Russian Journal of Earth Sciences 1681-1208 46536 10.2205/2020ES000717 ОРИГИНАЛЬНЫЕ СТАТЬИ ORIGINAL ARTICLES ОРИГИНАЛЬНЫЕ СТАТЬИ The extreme northern jet of the Antarctic Circumpolar Current The extreme northern jet of the Antarctic Circumpolar Current Morozov E G Morozov E G egmoro-zov@mail.ru Frey D I Frey D I Fofanov D V Fofanov D V Krechik V A Krechik V A Tarakanov R Yu Tarakanov R Yu Vinokurov D L Vinokurov D L Shirshov Institute of Oceanology RAS ru Shirshov Institute of Oceanology RAS ru Shirshov Institute of Oceanology RAS ru Shirshov Institute of Oceanology RAS ru Shirshov Institute of Oceanology RAS ru Shirshov Institute of Oceanology RAS ru Shirshov Institute of Oceanology RAS ru Shirshov Institute of Oceanology RAS ru Shirshov Institute of Oceanology RAS ru Shirshov Institute of Oceanology RAS ru Shirshov Institute of Oceanology RAS ru Shirshov Institute of Oceanology RAS ru 20 5 29 10 2021 https://rjes.ru/en/nauka/article/46536/view

We analyze the location of the extreme northern jet of the Antarctic Circumpolar Current based on the measurements in cruise 79 of the R/V Akademik Mstislav Keldysh to the region of the Drake Passage in February-March 2020. The jet occupies a position over the slope of Tierra del Fuego Island over a depth range of 400-600 m based on the measurements along four sections using the shipborne SADCP and CTD/LADCP casts. The width of this coastal jet is about 15-20 km. It penetrates to the depths of 200-300 m. The jet follows the direction of isobaths. Velocities in the jet reach 40 cm/s. It is likely that this jet is a local one and does not continue along the entire circle around Antarctica, but based on the satellite data of the absolute dynamical topography (ADT) this jet continues into the shallow region between Tierra del Fuego and Falkland Islands.

We analyze the location of the extreme northern jet of the Antarctic Circumpolar Current based on the measurements in cruise 79 of the R/V Akademik Mstislav Keldysh to the region of the Drake Passage in February-March 2020. The jet occupies a position over the slope of Tierra del Fuego Island over a depth range of 400-600 m based on the measurements along four sections using the shipborne SADCP and CTD/LADCP casts. The width of this coastal jet is about 15-20 km. It penetrates to the depths of 200-300 m. The jet follows the direction of isobaths. Velocities in the jet reach 40 cm/s. It is likely that this jet is a local one and does not continue along the entire circle around Antarctica, but based on the satellite data of the absolute dynamical topography (ADT) this jet continues into the shallow region between Tierra del Fuego and Falkland Islands.

 Antarctic Circumpolar Current northern jet CTD measurements shipborne ADCP Drake Passage Antarctic Circumpolar Current northern jet CTD measurements shipborne ADCP Drake Passage This research was performed in the framework of the state assignment of Russia (theme No. 0128-2019-0008). The work was supported by the Russian Science Foundation (grant no. 16-17-10149).

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