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Based on the results of hydrological and hydrooptical measurements carried out in the winter of 2020 (November 27 – December 16) off the Crimea coast during the 115th cruise of the R/V Professor Vodyanitsky, the vertical structure of the coefficients of linear relationships between the horizontal distributions of temperature, salinity, density and total suspended matter concentration with a discreteness of 1 m in depth was analyzed. It is shown that the closest linear correlation are founded between temperature, salinity and total suspended matter concentration within the upper quasihomogeneous layer. In this layer, the values of the correlation coefficients between these parameters have a negative sign and exceed 0,75 in absolute value. Below the upper quasi-homogeneous layer, in the layer of high vertical gradients of thermohaline parameters, these connections noticeably weaken, while in the temperature and density fields they change sign and become positive. At the depths of the cold intermediate layer, linear connections increase again. The estimates of the relationships between the distribution of the fluorescence intensity of phycocyanin and phycoerythrin with thermohaline parameters revealed in most cases a low correlation level. A high direct correlation with the values of R ~ 0,65 – 0,75 was revealed only between the distributions of the phycocyanin fluorescence intensity and the temperature distribution under the main thermocline in the 65 – 70 m layer.
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