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7 December 2022 Spectral bio-optical properties of the Black Sea coastal waters (near Sevastopol) in summer 2020-2021
T. Efimova, T. Churilova, E. Skorokhod, N. Moiseeva, V. Buchelnikova, A. Buchelnikov, P. Salyuk, E. Zemlianskaia
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Proceedings Volume 12341, 28th International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics; 123414U (2022) https://doi.org/10.1117/12.2645084
Event: 28th International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics, 2022, Tomsk, Russia
Abstract
Spectral bio-optical properties of Black Sea coastal waters (near Sevastopol) with different trophic status were analysed. In summer 2020-2021, the chlorophyll a concentration (Ca) differed by an order between stations, located in the apex of the Sevastopol Bay and at a distance ~2 miles from the Sevastopol Bay. At the station located in the apex of the Sevastopol Bay, effected by river runoff (the most trophic waters), the total particulate light absorption at wavelength 438 nm (aP(438)) increased by an order compared to station located at a distance of ~2miles zone from the Bay. The contribution of the light absorption by non-algal particles to the ap(438) was not depended on water trophic status. With a rise of water trophic status the coefficient of colored dissolved organic matter absorption increased by ~2.2 times, and the coefficient of total non-water absorption (atot(438)) increased by ~4 times. The spectral features of downwelling irradiance depended on the atot(438). The increasing of atot(438) of about 10 times resulted in shift of ~50 nm to the longer wavelength domain of the spectrum.
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T. Efimova, T. Churilova, E. Skorokhod, N. Moiseeva, V. Buchelnikova, A. Buchelnikov, P. Salyuk, and E. Zemlianskaia "Spectral bio-optical properties of the Black Sea coastal waters (near Sevastopol) in summer 2020-2021", Proc. SPIE 12341, 28th International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics, 123414U (7 December 2022); https://doi.org/10.1117/12.2645084
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KEYWORDS
Absorption
Water
Particles
Transparency
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