hydrophysicsФундаментальная и прикладная гидрофизикаFundamental and Applied Hydrophysics2073-66732782-5221St. Petersburg Research Center of the Russian Academy of Sciences10.7868/S2073667320020057hydrophysics-100Research ArticleГИДРООПТИКАHYDROOPTICSВлияние взвешенного и растворенного органического вещества на спектральные характеристики облученности и эффективность поглощения света пигментами фитопланктона в прибрежных водах Черного моряEffect of dissolved and suspended matter on light in the sea and phytoplankton light absorbance capacity in coastal waters of the Black SeaЧуриловаТ. Я.ChurilovaT. Ya.

299011, пр. Нахимова, д. 2, г. Севастополь

299011, Nakhimova Prospekt, 2, Sevastopol

tanya.churilova@ibss-ras.ruСуслинВ. В.SuslinV. V.

299011, Капитанская ул., д. 2, г. Севастополь

299011, Kapitanskaya Str., 2, Sevastopol

ЕфимоваТ. В.EfimovaT. V.

299011, пр. Нахимова, д. 2, г. Севастополь

299011, Nakhimova Prospekt, 2, Sevastopol

МоисееваН. А.MoiseevaN. A.

299011, пр. Нахимова, д. 2, г. Севастополь

299011, Nakhimova Prospekt, 2, Sevastopol

СкороходЕ. Ю.SkorokhodE. Yu.

299011, пр. Нахимова, д. 2, г. Севастополь

299011, Nakhimova Prospekt, 2, Sevastopol

Институт биологии южных морей им. А.О. Ковалевского РАНРоссияA.O. Kovalevsky Institute of Biology of the Southern Seas RASRussian FederationМорской гидрофизический институт РАНРоссияMarine Hydrophysical Institute RASRussian Federation2020011220211324350Copyright © Чурилова Т.Я., Суслин В.В., Ефимова Т.В., Моисеева Н.А., Скороход Е.Ю., 20212021Чурилова Т.Я., Суслин В.В., Ефимова Т.В., Моисеева Н.А., Скороход Е.Ю.Churilova T.Y., Suslin V.V., Efimova T.V., Moiseeva N.A., Skorokhod E.Y.This work is licensed under a Creative Commons Attribution 4.0 License.https://hydrophysics.spbrc.ru/jour/article/view/100

Влияние оптически активных компонентов на спектральные характеристики проникающего излучения и на способность фитопланктона поглощать фотосинтетически активную радиацию исследовали на примере прибрежных вод Черного моря в районе Крымского полуострова, в которых измерения спектральных показателей поглощения света пигментами фитопланктона, неживым взвешенным веществом и окрашенным растворенным органическим веществом проводились во все сезоны 2016 г. Установлено, что увеличение содержания оптически активных компонентов влияет на спектральные характеристики проникающего излучения — смещение длины волны максимума спектра нисходящей облученности на ~25–40 нм в длинноволновую часть, что приводит к понижению удельной эффективности поглощения света пигментами фитопланктона до ~3 раз. Показано, что изменение спектрального состава квантовой облученности, связанное с содержанием любого оптически активного компонента среды, описывается единой зависимостью от величины отношения показателей поглощения света неживой компонентой и пигментами фитопланктона aCDM(440/ aph(440)), которая меняется от оптических глубин.

The effect of in water optically active components on spectral downwelling irradiance and on phytoplankton capacity to absorb light has been investigated in coastal waters of the Black Sea near Crimean Peninsula, where spectral light absorption coefficients of phytoplankton, non-algal particles and colored dissolved organic matter were measured in different seasons 2016. It has been revealed, that an increasing of content of optically active components effect on the spectral features of downwelling irradiance — shift of wavelength of the maximum of spectral downwelling irradiance to the longer wavelength on ~25–40 nm, which resulted in ~3 times decreasing of the spectrally weighted chlorophyll-a specific absorption coefficient. It has been shown that change in spectral downwelling irradiance, caused by content of any optically active components, is described by its relationship on ratio between light absorption coefficients of colored detrital matter and phytoplankton pigment (aCDM(440)/aph(440)), which is optical depth-dependent.

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The authors declare that there are no conflicts of interest present.