Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa, 2020, Vol. 17, No. 1, pp. 243-251
Mesoscale cyclogenesis over the Sea of Japan. Path II: mesocyclonic activity associated with atmospheric blocking
I.A. Gurvich
1 , M.K. Pichugin
1 , E.S. Khazanova
1 1 V.I. Il’ichev Pacific Oceanological Institute FEB RAS, Vladivostok, Russia
Accepted: 29.01.2020
DOI: 10.21046/2070-7401-2020-17-1-243-251
In part II of the work, an increase in mesocyclonic activity over the Sea of Japan in the cold season of 2017/2018 was analyzed. The interest in the selected season was caused by the abnormally prolonged air cold-outbreak, which was associated with the locating of a blocking tropospheric ridge over the North-West Pacific during 10–11 days. Multisensor satellite measurements were used to analyze the evolution of polar mesocyclones (PMC) over the sea. PMCs were identified using an archive of satellite images for 15 cold seasons (October – April) 2003–2018. Mesocyclonic activity during the atmospheric blocking in the cold season 2017/2018 lasted 17 days with interruptions for 1–3 days. From January 22 to February 7, 2018, 11 PMCs of the meso-α- and meso-β scales of various intensities appeared over the Sea of Japan. Particular attention was paid to PMC with a wind speed close to the hurricane (>30 m/s), and PMC with a double loop of the trajectory and a life cycle of more than 7 days, which is comparable with the life cycle of a synoptic-scale cyclone. The study of the PMC with loop trajectories, as well as long-lived, will continue as the archive is replenished and the series of observations increases.
Keywords: polar mesocyclones, Sea of Japan, multisensory satellite measurements, upper-level blocking ridge, loop of trajectory
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