The maximum rivers inflow into the northwestern part of the Black Sea is on May-June. The plume occupies the largest area during this period. The alongshore current of desalinated waters, directed to the south, is formed, its transport increases. The mixing of water and its transport affect the spatiotemporal distribution of chlorophyll-"a" concentrations and, in general, the ecological state of the shelf waters. The six typical wind field distributions are obtained as a result of synoptic situations analysis by self-organizing Kohonen map method. It’s can be grouped by the predominance of the northward and southward winds. Estimates of the frequency of occurrence of synoptic situations for a decade have been obtained and their interannual variability has been analyzed in comparison with climatic indices characterizing large-scale atmospheric circulation.
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