ASSESSMENT OF THE STATE OF THE GULF OF FINLAND BASED ON HELCOM INDICATORS OF EUTROPHICATION
The environmental status of the Gulf of Finland water environment was analyzed on the basis of data of international monitoring. Seasonal and interannual variability of such indicators of eutrophication of aquatic environment of the Gulf of Finland as concentration of nutrients, dissolved oxygen and chlorophyll a has been analyzed. There is a general significant excess of the established values of the target HELCOM eutrophication indicators for the Gulf of Finland. At the same time, there are differences in the variability of the parameters for the eastern and western parts of the Gulf of Finland, reflecting, apparently, the natural differences in the morphometric characteristics and the formation of the hydrochemical and hydrobiological regime of these water areas. It was shown, that achievement of the “Good Environmental Status” defined in the Baltic Sea Action Plan according to the existing target indicators is unlikely for this water body.