Research of the bio-optical characteristics of the surface layer waters of the Russian Arctic Seas

The paper presents the generalized results of studies of the water surface layer bio-optical characteristics of the Barents, Kara and Laptev Seas and the interpretation of the observed phenomena. A joint analysis of the data on the bio-optical characteristics spatial distribution obtained in 2018 using a shipboard flow-through measuring complex and satellite observations for the period 2003—2017 was performed. The analysis allowed us to identify the role of the main processes that determine this distribution, its seasonal and interannual changes. It is shown that the spatial distribution of the fluorescence intensity of the colored dissolved organic matter and chlorophyll is in good agreement with the hydrophysical characteristics in the area of river runoff influence; the spatial distributions of the attenuation coefficient are in good agreement with them. The data obtained made it possible to determine the position of the Arctic and Atlantic waters and coccolithophore blooms in the Barents Sea, to identify the distribution boundaries of the surface desalinated layer in the Kara and Laptev Seas. Statistical estimates of the relationship between the bio-optical characteristics of the Barents and Kara Seas from satellite data are presented.

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