Abstract
A method for calculating the vertical profiles of the spectral absorption coefficient of suspended particles is presented, taking into account the stratification of the seawater extinction coefficient the surface layer. The method was developed on the basis of data obtained in 84-th cruise of the R/V “Akademik Mstislav Keldysh” in the Arctic Ocean (“European Arctic 2021”, July 24 – August 26, 2021). The calculated profiles were used to estimate the vertical distribution of the concentration of chlorophyll a and further numerical simulation of the downwelling flux of photosynthetically active radiation. Comparison of the calculated light fields parameters with the results of in situ determinations showed good agreement (the root-mean-square error between the measured and calculated PAR values is 8 %).
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