hydrophysicsФундаментальная и прикладная гидрофизикаFundamental and Applied Hydrophysics2073-66732782-5221St. Petersburg Research Center of the Russian Academy of Sciences10.59887/2073-6673.2025.18(1)-5hydrophysics-1416Research ArticleГИДРООПТИКАHYDROOPTICSКонцентрация хлорофилла «а» и поглощение света окрашенным растворенным органическим веществом в Черном море зимой (2018) и летом (2020)Chlorophyll “a” concentration and light absorption by colored dissolved organic matter in the Black Sea in winter (2018) and summer (2020)https://orcid.org/0000-0002-0045-7284ЧуриловаТ. Я.ChurilovaT. Ya.

Чурилова Татьяна Яковлевна, ведущий научный сотрудник, кандидат биологических наук

WoS ResearcherID: O-8437–2016, Scopus AuthorID: 6603622802

299011, Севастополь, пр. Нахимова, д. 2 

WoS ResearcherID: O-8437–2016, Scopus AuthorID: 6603622802

2 Nakhimov Ave., Sevastopol 299011 

tanya.churilova@ibss-ras.ruhttps://orcid.org/0000-0002-3057-3964СкороходЕ. Ю.SkorokhodE. Yu.

Скороход Елена Юрьевна, научный сотрудник

WoS ResearcherID: A-6831–2019, Scopus AuthorID; 57215009764

299011, Севастополь, пр. Нахимова, д. 2 

WoS ResearcherID: A-6831–2019, Scopus AuthorID; 57215009764

2 Nakhimov Ave., Sevastopol 299011 

elenaskorokhod@ibss-ras.ruhttps://orcid.org/0000-0003-3908-4160ЕфимоваТ. В.EfimovaT. V.

Ефимова Татьяна Владимировна, старший научный сотрудник, кандидат биологических наук

WoS ResearcherID: X-1355–2019, Scopus AuthorID: 57194423783

299011, Севастополь, пр. Нахимова, д. 2 

WoS ResearcherID: X-1355–2019, Scopus AuthorID: 57194423783

2 Nakhimov Ave., Sevastopol 299011 

tefimova@ibss-ras.ruhttps://orcid.org/0000-0003-1356-7981МоисееваН. А.MoiseevaN. A.

Моисеева Наталия Александровна, научный сотрудник

WoS ResearcherID: AAH-2819–2019, Scopus AuthorID: 57194431032

299011, Севастополь, пр. Нахимова, д. 2 

WoS ResearcherID: AAH-2819–2019, Scopus AuthorID: 57194431032

2 Nakhimov Ave., Sevastopol 299011 

moiseeva@ibss-ras.ruИнститут биологии южных морей имени А.О. Ковалевского РАНРоссияA.O. Kovalevsky Institute of Biology of the Southern Seas of RASRussian Federation2025280420251815365Copyright © Чурилова Т.Я., Скороход Е.Ю., Ефимова Т.В., Моисеева Н.А., 20252025Чурилова Т.Я., Скороход Е.Ю., Ефимова Т.В., Моисеева Н.А.Churilova T.Y., Skorokhod E.Y., Efimova T.V., Moiseeva N.A.This work is licensed under a Creative Commons Attribution 4.0 License.https://hydrophysics.spbrc.ru/jour/article/view/1416

В работе были использованы результаты исследований в Черном море в ходе экспедиций НИС «Профессор Водяницкий» — с 24 ноября по 10 декабря 2018 г. (PV105), с 4 по 24 июня 2020 г. (PV113). Получены новые для Черного моря данные о поглощении света окрашенным растворенным органическим веществом (CDOM) в зимний и летний периоды года. Зимой в поверхностном слое моря содержание CDOM, маркером которого является показатель поглощения aCDOM(438) (0,10 ± 0,015 м–1), превышало летние значения (0,062 ± 0,025 м–1). Сезонных различий по средним значениям спектрального наклона (SCDOM) не установлено (0,019 нм-1).Однако, вариабельность значений SCDOM летом отмечена в более широком диапазоне (0,015 до 0,026 нм–1), чем зимой (0,017–0,021 нм–1). Высокие летние значения SCDOM являются следствием фотодеструкции CDOM в поверхностном слое моря летом. Установлена обратная связь между aCDOM(438) и SCDOM, которая описывается степенной зависимостью. Показаны сезонные различия в содержании хлорофилла а (TChl-a) в верхнем квазиоднородном слое (1,1 ± 0,43 мг м–3 зимой и 0,32 ± 0,11 мг м–3 летом) и в характере вертикального распределения TChl-a, обусловленные гидрологической структурой вод: зимой — однородное распределение в пределах верхнего квазиоднородного слоя, который соизмерим или превышает зону фотосинтеза, летом — наличие слоя максимальных концентраций хлорофилла а вблизи нижней границы зоны фотосинтеза. Связи между aCDOM(438) и TChl-a не выявлено.

The study was based on the results obtained during the expeditions of the R/V “Professor Vodyanitsky” — from November 24 to December 10, 2018 (PV105), from June 4 to 24, 2020 (PV113). New data of light absorption by colored dissolved organic matter (CDOM in the winter and summer were presented. In winter, in the sea surface layer, the light absorption coefficients of CDOM (aCDOM(438)) (0.10 ± 0.015 m–1), exceeded summer values (0.062 ± 0.025 m–1). There were no seasonal differences in the mean spectral slope (SCDOM) values (0.019 nm–1). However, the variability of SCDOM values in summer is noted in a wider range (0.015 to 0.026 nm–1) than in winter (0.017–0.021 nm–1). The highest SCDOM values are resulted from photodestruction of CDOM in the sea surface layer in summer. An inverse relationship has been revealed between aCDOM(438) and SCDOM, which is described by a power law. Seasonal differences in the content of chlorophyll a (TChl-a) in the upper mixed layer (1.1 ± 0.43 mg m–3 in winter and 0.32 ± 0.11 mg m–3 in summer) and in the type of the TChl-a vertical distribution, due to the water hydrological structure, were shown: in winter — uniform distribution within the upper mixed layer, which was comparable to or exceeded the photosynthesis zone, in summer — the presence of a layer of deep chlorophyll a maximum near the bottom of the euphotic zone. Relationship between aCDOM(438) and SCDOM was not revealed for both seasons.

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