Possible Mechanism for the Generation of Internal Wavesby Submesoscale Eddies in the Mozambique Channel , 2022, Vol. 58, No. 6, pp. 598–608

Marchuk, E.A.; Chunchuzov, I.P.; Repina, I.A.; Johannessen, O.M.

Авторы: Marchuk E.A., Chunchuzov I.P., Repina I.A., Johannessen O.M.
Журнал: Izvestiya - Atmospheric and Oceanic Physics
Том: 58
Номер: 6
Год издания: 2022
Издательство: Pleiades Publishing, Ltd
Местоположение издательства: Road Town, United Kingdom
Первая страница: 598
Последняя страница: 608
DOI: 10.1134/S000143382206010X
Аннотация: This paper studies a possible mechanism for the formation of spiral structures around a submesoscale eddy (Rossby number Ro ~ 5) detected on September 22, 2017, by a Sentinel-1 synthetic aperture radar (SAR) image of an ocean area in the Mozambique Channel (Africa). We present a calculation of wave crest shapes of trapped internal waves in a stably stratified ocean thermocline that are generated due to advection by the eddy current of its turbulent density and velocity inhomogeneities. The shapes of the simulated internal wave crests compare well with the shape of the spiral bands in the eddy image, thereby supporting our hypothesis that eddies can generate internal waves. The parameters (variations in the intensity of a reflected radar signal and their spectra and horizontal periods) of the banded spiral structure are also analyzed for a second submesoscale eddy with a diameter of about 5 km detected in the image from September 25, 2017, and having an opposite direction of circulation of the current inside the eddy as compared to the current inside the eddy in the image from September 22, 2017.
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Possible Mechanism for the Generation of Internal Wavesby Submesoscale Eddies in the Mozambique Channel , 2022, Vol. 58, No. 6, pp. 598–608статья

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