статья в журнале

En

Russian Meteorology and Hydrology

ISSN:10683739
eSSN:1934-8096

2022

10.3103/S106837392204001X

Statistical characteristics of polar mesocyclones (PMCs) generated over the Russian northern seas, east of Novaya Zemlya (the Kara, Laptev, and East Siberian seas) were obtained from the Arctic System Reanalysis (ASR) data. The Okubo–Weiss criterion supplemented by a limitation on the horizontal size of the cyclone was used to identify mesoscale cyclones. It is shown that the annual variations in the number of mesocyclones are characterized by a summer maximum, and the monthly mean intensity of mesocyclones is the highest in autumn. The prevailing directions of movement of polar mesocyclones over each of the three seas are considered. It is demonstrated that during PMCs generation atmospheric fields are characterized by the synoptic near-surface depression, which leads to the transport of relatively warm air from the land to the sea and determines the development of polar mesocyclones over the sea. At the same time, heat fluxes from the sea surface in the mesocyclones are on average small. © 2022, Pleiades Publishing, Ltd.

cyclone statistics, eastern sector of the Arctic, Okubo–Weiss criterion, polar mesocyclones

2022-08-03 15:16:27