Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa, 2017, Vol. 14, No. 4, pp. 155-168
Some features of mesoscale cyclogenesis over the Japan Sea
I.A. Gurvich
1 , M.K. Pichugin
1 , A.V. Baranyuk
1 , V.P. Kuleshov
1 1 V.I. Il’ichev Pacific Oceanological Institute FEB RAS, Vladivostok, Russia
Accepted: 25.05.2017
DOI: 10.21046/2070-7401-2017-14-4-155-168
The work is dedicated to a comparative analysis of winter and summer mesocyclogenesis over the Japan Sea. The study was conducted using multisensory satellite measurements. The winter polar low in the rear of the extratropical (southern) cyclone located over the Pacific Ocean to the east of Japan was analyzed. It is shown that mesocyclonic activity is observed in summer with a similar trajectory of southern and tropical cyclones. An analysis of the summer mesocyclone with characteristics of polar low is presented. In this study, such mesocyclone is classified as quasipolar low. The general regularities of winter and summer mesocyclogenesis over the Japan Sea within the general circulation with extratropical or tropical cyclones are revealed. Polar and quasipolar lows occur when the Far Eastern tropospheric trough moves eastward and its axis crosses 120°E meridian. Mesocyclones are generated under cold high-level depressions that form in the tropospheric trough and pass over the Japan Sea. Polar lows are intensified when a distance between the centers of meso- and synoptic scales pressure systems is 900-1000 km. A comparative analysis of winter and summer mesocyclogenesis in terms of hydrometeorological characteristics retrieved from passive (AMSR2 radiometer) and active (scatterometers) satellite measurements showed that the atmospheric water vapor content and cloud liquid water content in synoptic-scale cyclones and associated with them meso-scale vortices are close in quantity.
Keywords: polar lows, quasipolar lows, cyclogenesis, Japan Sea, multisensory satellite measurement, reanalysis, atmospheric water vapor content, cloud liquid water, sea surface wind, cold advection
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