Aleksanina M. G., M.G. Aleksanina, A.S. Eremenko, S.E. Dyakov, A.V. Kazansky, V.A. Levin
Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa
Space Research Institute Russian Academy of Sciences
2020, Vol. 17, No. 6
ISSN 2070-7401 (Print), ISSN 2411-0280 (Online)
M.G. Aleksanina, A.C. Eremenko, S.E. Dyakov, A.V. Kazansky, V.A. Levin The study of atmospheric vortex streets over the North-West Pacific from meteorological satellite imagery // Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa, 2020, Vol. 17, No. 6, pp. 63–69
The results of satellite monitoring of atmospheric vortex streets behind Jeju Island in the Korean Strait in the winter of 2015 and behind Kuril Islands in the spring of 2012 are presented. The main hydrodynamic parameters of atmospheric vortex streets were calculated using satellite data. These are the numbers of Reynolds, Strouhal, Froude as well as the speed of vortex drift and vortex generation time by the calculation of geometric parameters. The characteristic obstacle typical size was chosen at the height of the inversion layer upper boundary based on the vertical atmosphere temperature profile. We compared the results with a widely used approach (the “dividing-streamline” concept) that is based on an estimate of the height of the airflow line separating the horizontal flow around the obstacle from the flow through it. Shown that the vortex streets appear to arise in the inversion layer, and the characteristic obstacle size must correspond to the size of the section at the height that is below the inversion layer upper boundary, but above the island base.