Abstract
A method is proposed for constructing a regional algorithm for calculating the thickness of the euphotic zone from in situ measurements of the vertical profiles of the beam attenuation coefficient under the condition of one-parameter optical properties of water (Case-1 water). Using the proposed methodology, a regional algorithm for determining the thickness of the photic zone was developed based on the results of synchronous measurements of the beam attenuation coefficient and photosynthetically active radiation, performed in January 2022 as part of the 87th cruise of the R/V Akademik Mstislav Keldysh for the northwestern part of the Weddell Sea. For this region, an equation was obtained that makes it possible to estimate the photic zone depth with a relative reconstruction error of 18%.
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