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ISSN 2070-7401 (Print), ISSN 2411-0280 (Online)
Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa
CURRENT PROBLEMS IN REMOTE SENSING OF THE EARTH FROM SPACE

  

Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa, 2020, Vol. 17, No. 1, pp. 223-233

Mesoscale polar cyclone from satellite data and results of numerical simulation

V.V. Efimov 1 , D.A. Yarovaya 1 , O.I. Komarovskaya 1 
1 Marine Hydrophysical Institute RAS, Sevastopol, Russia
Accepted: 02.12.2019
DOI: 10.21046/2070-7401-2020-17-1-223-233
A mesoscale polar cyclone observed in the Arctic region for more than 2 days between 18 and 20 January 2017 is investigated. The cyclone originated north of Iceland and traveled more than 2,000 km from its origin to the Barents Sea. Satellite data on driving wind fields, sea surface temperature, sensible and latent heat fluxes from the sea surface as well as reanalysis data of ERA5 are considered. It is concluded that the strengthening of the cyclone is connected with a cold invasion on January 19–20 in the area of Is. Spitsbergen. The cyclone is reproduced using the polar version of the WRF numerical atmospheric circulation model. According to the results of simulation the trajectory of the cyclone is constructed, the wind and temperature fields in the developed cyclone are described. It is shown that even at the stage of its greatest development, the cyclone was a shallow near-surface vortex with a warm core formed as a result of vertical circulation. The values of heat fluxes in this cyclone are compared with the characteristic values in a tropical hurricane. To estimate the rate of decay of the cyclone, a numerical experiment with the shutdown of heat generation during condensation of water vapor in convective flows is carried out and described.
Keywords: polar mesoscale cyclone, mesoscale atmospheric simulation, satellite data analysis
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