During the scientific expedition "European Arctic - 2020" on the R/V "Akademik Mstislav Keldysh" (cruise No. 80), the concentration of chlorophyll a, spectral coefficients of light absorption by phytoplankton pigments, non-algal particles and colored dissolved organic matter have been measured in the euphotic layer of the Norwegian and the Barents Seas, and in the Arctic Ocean from July 28 to August 23, 2020. High variability of bio-optical properties, heterogeneity of the studied water area in terms of the relative contribution of colored dissolved organic matter to the total lightu absorption was revealed. Relationship between the total light absorption at 438 and 490 nm in the surface layer and the photosynthesis zone has been obtained.
The work is devoted to the study of the effect of phycoerythrin pigment on the seawater optical properties in the Atlantic sector of the Southern Ocean. The investigation was carried out in the 79th expedition of the R / V “Akademik Mstislav Keldysh” in January 2020. At some stations, a high content of phycoerythrin was registered in the fluorescence spectra of seawater, the light absorption spectra by suspended particles, and in the remote sensed reflectance spectra of seawater. In particular, the fluorescence of this pigment induced by solar radiation was recorded in ocean color data. The presence of phycoerythrin can lead to uncertainties of the chlorophyll-a concentration estimates from satellite data retrieved with standard algorithms.
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