Russian Journal of Earth Sciences Russian Journal of Earth Sciences Russian Journal of Earth Sciences 1681-1208 46529 10.2205/2020ES000733 ОРИГИНАЛЬНЫЕ СТАТЬИ ORIGINAL ARTICLES ОРИГИНАЛЬНЫЕ СТАТЬИ Semidiurnal internal tide in the Atlantic Ocean Semidiurnal internal tide in the Atlantic Ocean Morozov E G Morozov E G egmoro-zov@mail.ru Ansorge I Ansorge I Vinokurov D V Vinokurov D V Shirshov Institute of Oceanology RAS ru Shirshov Institute of Oceanology RAS ru University of Cape Town ru University of Cape Town ru Shirshov Institute of Oceanology RAS ru Shirshov Institute of Oceanology RAS ru 20 4 29 10 2021 https://ras.editorum.ru/en/nauka/article/46529/view

Analysis of the generation of internal tides over submarine ridges in the Atlantic Ocean based on numerical modeling and measurements on moorings is considered. It was found that energy fluxes of internal tides from submarine ridges are many times greater than those from the continental slopes because generally the barotropic tidal flow is parallel to the coastline. If submarine ridges are normal to the tidal flow, they form an obstacle to the tidal currents and induce generation of large internal waves. Energy fluxes were estimated from many submarine ridges. These estimates were compared with the measurements on moorings. Numerical estimates and measurements on moorings resulted in a map of internal tide amplitudes in the Atlantic Ocean. Large amplitudes of internal tides were found over the slopes of the Mid-Atlantic Ridge in the South Atlantic, Walvis Ridge, Great Meteor Bank, in Biscay Bay, and in the Strait of Gibraltar.

Analysis of the generation of internal tides over submarine ridges in the Atlantic Ocean based on numerical modeling and measurements on moorings is considered. It was found that energy fluxes of internal tides from submarine ridges are many times greater than those from the continental slopes because generally the barotropic tidal flow is parallel to the coastline. If submarine ridges are normal to the tidal flow, they form an obstacle to the tidal currents and induce generation of large internal waves. Energy fluxes were estimated from many submarine ridges. These estimates were compared with the measurements on moorings. Numerical estimates and measurements on moorings resulted in a map of internal tide amplitudes in the Atlantic Ocean. Large amplitudes of internal tides were found over the slopes of the Mid-Atlantic Ridge in the South Atlantic, Walvis Ridge, Great Meteor Bank, in Biscay Bay, and in the Strait of Gibraltar.

 Internal tide submarine ridges energy flux deep basins Internal tide submarine ridges energy flux deep basins The work was carried out within the State Task of the Russian Federation 0149-2019-0004; the research was supported by the Russian Foundation for Basic Research (grant 19-57-60001, numerical simulations) and by the Russian Science Foundation (grant 16-17-10149, data analysis). The work of I. Ansorge was supported by the National Research Foundation of South Africa (Grant UID 118901).

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