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Moiseeva N. A., Churilova T. Ya., Efimova T. V., Artemiev V. A., Skorokhod E. Yu. Spectral bio-optical properties of water of Atlantic sector of Antarctic. Marine Biological Journal, 2020, vol. 5, no. 4, pp. 69-78. https://doi.org/10.21072/mbj.2020.05.4.06

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Abstract

Studies of variability of spectral bio-optical properties of water of Atlantic sector of Antarctic were carried out during the 79th cruise of the RV “Akademik Mstislav Keldysh” (11.01.2020–04.02.2020). Chlorophyll a and phaeopigment concentration varied in the layer studied from 0.1 to 1.8 mg·m−3, except for two stations with content reaching 2.2 and 4.4 mg·m−3. The relationship was revealed between light absorption coefficient by phytoplankton and chlorophyll a concentration at a wavelength, corresponding to spectrum maxima: aph(438) = 0.044 × Ca1.2, r2 = 0.84 (n = 117); aph(678) = 0.021 × Ca1.1, r2 = 0.89 (n = 117). Spectral distribution of light absorption coefficient by non-algal particles and colored dissolved organic matter was described by exponential function. Absorption parameterization coefficients were retrieved: (1) light absorption coefficient by non-algal particles (0.001–0.027 m−1) and by colored dissolved organic matter (0.016–0.19 m−1) at a wavelength of 438 nm; (2) spectral slope coefficients of these components (0.005–0.016 and 0.009–0.022 nm−1, respectively).

Authors

N. A. Moiseeva

junior researcher

https://orcid.org/0000-0003-1356-7981

https://elibrary.ru/author_items.asp?id=959717

T. Ya. Churilova

leading researcher, PhD

https://orcid.org/0000-0002-0045-7284

https://elibrary.ru/author_items.asp?id=888565

T. V. Efimova

junior researcher

https://orcid.org/0000-0003-3908-4160

https://elibrary.ru/author_items.asp?id=766926

V. A. Artemiev
senior researcher, PhD

https://elibrary.ru/author_items.asp?id=611644

E. Yu. Skorokhod

junior researcher

https://orcid.org/0000-0002-3057-3964

https://elibrary.ru/author_items.asp?id=1034485

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Funding

This work has been carried out within the framework of IBSS government research assignments “Study of the spatiotemporal organization of aquatic and terrestrial ecosystems in order to develop an operational monitoring system, based on remote sensing data and GIS technologies” (No. АААА-А19-119061190081-9) and “Comprehensive studies of the current state of the ecosystem of the Atlantic sector of the Antarctic” (No. АААА-А19-119100290162-0), as well as with the support of government research assignment No. 0128-2019-0008. Optical data analysis was carried out with the support of the RFBR grant No. 19-55-45024 ИНД_а.

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