Bio-optical model for conditions of intense coccolithophore bloom in the Black Sea

Svetlana V. Vazyulya; Dmitriy N. Deryagin; Dmitry I. Glukhovets; Vladimir A. Silkin; Larisa A. Pautova

doi:10.1117/12.2692656

17 October 2023 Bio-optical model for conditions of intense coccolithophore bloom in the Black Sea

Svetlana V. Vazyulya, Dmitriy N. Deryagin, Dmitry I. Glukhovets, Vladimir A. Silkin, Larisa A. Pautova

Proceedings Volume 12780, 29th International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics; 127804I (2023) https://doi.org/10.1117/12.2692656
Event: XXIX International Symposium "Atmospheric and Ocean Optics, Atmospheric Physics", 2023, Moscow, Russian Federation

Abstract

The possibility of creating a bio-optical model for calculating parameters of underwater light fields under conditions of intense coccolithophore bloom in the Black Sea is shown. Hydrolight software is used for bio-optical modeling. The influence of the parameters of the bio-optical model both on the remote sensing reflectance spectrum and on the concentration of coccolithophores is demonstrated. The coccolithophore concentration is calculated using a regional algorithm. The optimal modeling parameters yield the remote sensing reflectance spectrum which nearly coincides with measured one. A decrease in the thickness of the coccolithophore layer relative to the optimal one leads to a comparable decrease in the concentration of coccolithophores, at the same time its increase does not play such a significant role. Estimates of the concentration of coccolithophores change little with variations in the concentration of chlorophyll, but they are more sensitive to changes in the amount of colored dissolved organic matter. The created bio-optical model made it possible to study the accuracy of chlorophyll estimation algorithms under conditions of intensive coccolithophore bloom.

Citation Download Citation

Svetlana V. Vazyulya, Dmitriy N. Deryagin, Dmitry I. Glukhovets, Vladimir A. Silkin, and Larisa A. Pautova "Bio-optical model for conditions of intense coccolithophore bloom in the Black Sea", Proc. SPIE 12780, 29th International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics, 127804I (17 October 2023); https://doi.org/10.1117/12.2692656

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KEYWORDS

Satellites

Absorption

Algorithm development

Modeling

Scattering

Backscatter

Reflectivity

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