Affiliation:
1. Marine Hydrophysical Institute, Russian Academy of Sciences
Abstract
The main optical characteristics of phytoplankton and colored dissolved organic matter are described. The necessity of simultaneous registration of fluorescence of phytoplankton pigments and colored dissolved organic matter in seawater in situ is substantiated. Commercial recording devices, realizing registration of signals of phytoplankton fluorescence intensity in situ, are considered. This paper presents the developed experimental probing autonomous multichannel multichannel meter of fluorescence and light scattering in seawater (FR1). The paper presents the functional scheme of the developed meter, describes its main assemblies and principles of its operation. The developed meter allows quasi-simultaneous registration of a large set of parameters: excitation spectra of phytoplankton fluorescence, fluorescence intensity of phytoplankton pigments (chlorophyll-a, phycoerythrin, phycocyanin, β-carotene), as well as fluorescence intensity of colored dissolved organic matter and spectra of light scattering index at an angle of 90°. Registration of all these parameters is carried out from one measuring volume, where the same composition of suspended matter is located in the process of probing at each specific moment of time. The paper presents the results of approbation of the developed meter and suggests the direction of further research using it.
Publisher
Saint-Petersburg Research Center of the Russian Academy of Science
Subject
Geophysics,Condensed Matter Physics,Water Science and Technology,Oceanography
Reference41 articles.
1. Sieburth J.M.N., Smatacek V., Lenz J. Pelagic ecosystem structure: Heterotrophic compartments of the plankton and their relationship to plankton size fractions. Limnology and Oceanography. 1978, 23(6), 1256–1263. doi:10.4319/lo.1978.23.6.1256
2. Geider R.J., Delucia E.H., Falkowski P.G. et al. Primary productivity of planet earth: biological determinants and physical constraints in terrestrial and aquatic habitats Global Сhange Biology. 2001, 7, 8, 849–882. doi:10.1046/j.1365-2486.2001.00448.x
3. Popik A.Y. Dynamics of spectra of laser induced chlorophyll-a fluorescence of phytoplankton in conditions of changing parameters of the external environment: Diss. … kand. fiz.-mat. nauk. Institut Avtomatiki i processov upravlenia. Vladivostok, 2015. 145 p. (in Russian).
4. Safonov A.V., Ognistaya A.V., Boldyrev K.A. et al. The role of phytoplankton in self-purification of water bodies with radionuclide pollutants. Radiochemistry. 2022, 64, 2, 120–132. doi:10.1134/S1066362222020023
5. Evtushenko N.Y., Kuzmenko M.I., Sirenko L.A. Hydroecological consequences of the accident at the Chernobyl NPP. Kiev, Naukova dumka, 1992. 267 p. (in Russian).