Ecological Safety of Coastal and Shelf Zones of Sea Ecological Safety of Coastal and Shelf Zones of Sea 2413-5577 20250301 Research Article Synoptic Variability of Bio-Optical and Hydrological Parameters off the Crimea Coast According to Data from in situ Measurements in Summer 2023 Artamonov Yu. V.
Russian Federation
artam-ant@yandex.ru Skripaleva E. A.
Russian Federation
sea-ant@yandex.ru Latushkin A. A.
Russian Federation
sevsalat@gmail.com Fedirko A. V.
Russian Federation
vautl102@gmail.com Marine Hydrophysical Institute of RAS Sevastopol Russia 30 09 2025 2025 3 6 24 25 09 2024 24 06 2025 08 11 2024 Copyright © 2025, Yu. V. Artamonov, E. A. Skripaleva, A. A. Latushkin, A. V. Fedirko 2025 Yu. V. Artamonov, E. A. Skripaleva, A. A. Latushkin, A. V. Fedirko https://creativecommons.org/licenses/by-nc/4.0/ https://ecological-safety.ru/en/repository/issues/2025/03/01/

The paper studies the synoptic variability of the light beam attenuation coefficient and intensity of chlorophyll a fluorescence on the sea surface and its relationship with the distributions of hydrological parameters based on the hydrological and bio-optical measurements carried out off the coast of Crimea during the 127th cruise of R/V Professor Vodyanitsky in summer 2023. The measurements were carried out on a finer station grid with the vessel moving from west to east twice with a weekly interval (14-20 June and 22-28 June). It is shown that due to Rim Current penetration into the polygon during the 2nd stage of measurements, the Azov-Kerch waters flew into the polygon water area more intensely. This was accompanied by a decrease in waters transparency and salinity, and an increase in temperature, which was also influenced by the ongoing seasonal heating. In most of the study area, data from both measurement stages revealed a significant tendency of increasing chlorophyll a fluorescence intensity in water areas with a higher beam attenuation coefficient. Changes of the vertical thermohaline and bio-optical waters structure on a scale of about a week were observed in the entire measurement layer and were manifested in changes in the number and values of the maxima of the chlorophyll a fluorescence intensity, the light beam attenuation coefficient, temperature and salinity vertical gradients, as well as their depths. The main maximum of the light beam attenuation coefficient was observed either in the surface layer or in the layer of seasonal thermocline and halocline, while the maximum of the chlorophyll a fluorescence intensity was located under the layer of seasonal thermocline and halocline. The study found a significant linear correlation between the distributions of the depth of the seasonal thermocline and the depths of the maximum of the light beam attenuation coefficient and chlorophyll a fluorescence intensity, as well as between the depths of the seasonal halocline and the maximum intensity of chlorophyll a fluorescence.

 Black Sea hydrological stations light beam attenuation coefficient chlorophyll a fluorescence temperature salinity water circulation synoptic variability The work was carried out under FSBSI FRC MHI state assignment FNNN-2024-0014 "Ocean and atmosphere interaction" and FNNN-2024-0012 "Operational Oceanology". The data were obtained at the Center for Collective Use R/V Professor Vodyanitsky of FSBSI FRC A.O. Kovalevsky Institute of Biology of the Southern Seas of RAS.

About the authors:

Yuri V. Artamonov, Leading Research Associate, Marine Hydrophysical Institute of RAS (2 Kapitanskaya St., Sevastopol, 299011, Russian Federation), DSc (Georg.), ResearcherID: AAC-6651-2020, ORCID ID: 0000-0003-2669-7304, artam-ant@yandex.ru

Elena A. Skripaleva, Senior Research Associate, Marine Hydrophysical Institute of RAS (2 Kapitanskaya St., Sevastopol, 299011, Russian Federation), PhD (Georg.), ResearcherID: AAC-6648-2020, ORCID ID: 0000-0003-1012-515X, sea-ant@yandex.ru

Aleksandr A. Latushkin, Senior Research Associate, Marine Hydrophysical Institute of RAS (2 Kapitanskaya St., Sevastopol, 299011, Russian Federation), PhD (Georg.), Researcher ID: U-8871-2019, ORCID ID: 0000-0002-3412-7339, sevsalat@gmail.com

Aleksandr V. Fedirko, Junior Research Associate, Marine Hydrophysical Institute of RAS (2 Kapitanskaya St., Sevastopol, 299011, Russian Federation), ResearcherID: AAC-6629-2020, ORCID ID: 0000-0002-8399-3743, vautl102@gmail.com

Contribution of the authors:

Yuri V. Artamonov – general scientific supervision of the research, statement of study aims and objectives, development of methods, qualitative analysis of the results and interpretation thereof, discussion of the study results, drawing conclusions

Elena A. Skripaleva – review of literature on the study topic, qualitative analysis of the results and interpretation thereof, processing and description of the study results, discussion of the study results, drawing conclusions, article text preparation and refinement

Aleksandr A. Latushkin – preparation and maintenance of hydro-optical equipment, obtaining in situ data, participation in discussion of the article materials

Aleksandr V. Fedirko – development and debugging of software for data processing, computer implementation of algorithms, chart and diagram construction, participation in discussion of the article materials

All the authors have read and approved the final manuscript.

Article text not included.

REFERENCES IvanovV.A. KatuninaE.V. SovgaE.E. Assessment of Anthropogenic Impacts on the Ecosystem of the Waters of the Herakleian Peninsula in the Vicinity of Deep Drains Processes in GeoMedia 2016 5 62 68 (in Russian) BondurV.G. IvanovV.A. VorobievV.E. DulovV.A. DolotovV.V. ZamshinV.V. KondratievS.I. LeeM.E. MalinovskyV.V. Ground-to-Space Monitoring of Anthropogenic Impacts on the Coastal Zone of the Crimean Peninsula Physical Oceanography 2020 27 1 95 107 10.22449/1573-160X-2020-1-95-107 EismaD. Suspended Matter in the Aquatic Environment Berlin, Heidelberg Springer-Verlag 1993 315 10.1007/978-3-642-77722-6 Man'kovskiiV.I. Solov'evM.V. Relationship between the Beam Attenuation Coefficient and the Concentration of Suspended Matter in Black-Sea Waters Physical Oceanography 2003 13 2 123 128 10.1023/A:1023752514790 IzraelYu.A. TsybanA.V. Anthropogenic Ecology of the Ocean Moscow Flinta 2009 520 (in Russian) KukushkinA.S. AgafonovE.A. ProkhorenkoYu.A. Distribution of the Beam Attenuation Coefficient in the Black Sea Surface Coastal Waters Morskov Gidrofizicheskiy Zhurnal 2006 5 30 43 (in Russian) KukushkinA.S. Spatial and Temporal Variability of the Water Transparency Distribution in the North-Western Black Sea Atmospheric and Oceanic Optics 2017 30 9 750 762 10.15372/AOO20170904 (in Russian) HoepffnerN. SathyendranathS. Bio-Optical Characteristics of Coastal Waters: Absorption Spectra of Phytoplankton and Pigment Distribution in the Western North Atlantic Limnology and Oceanography 1992 37 8 1660 1679 10.4319/lo.1992.37.8.1660 McManusG.B. DawsonR. Phytoplankton Pigments in the Deep Chlorophyll Maximum of the Caribbean Sea and the Western Tropical Atlantic Ocean Marine Ecology Progress Series 1994 113 199 206 10.3354/meps113199 MordasovaN.V. Indirect Estimation of Water Productivity by the Chlorophyll Content Trudy VNIRO 2014 152 41 56 (in Russian) MoiseevaN.A. ChurilovaT.Ya. EfimovaT.V. KrivenkoO.V. MatorinD.N. Fluorescence of Chlorophyll a During Seasonal Water Stratification in the Black Sea Physical Oceanography 2019 26 5 425 437 10.22449/1573-160X-2019-5-425-437 TemerdashevZ.A. PavlenkoL.F. ErmakovaYa.S. KorpakovaI.G. EletskiiB.D. Extraction-Fluorimetric Determination of Chlorophyll "A" in the Natural Waters Analytics and Control 2019 23 3 323 333 (in Russian) MansurovaI.M. StelmakhL.V. FarberA.A. Vertical Distribution of Chlorophyll "A" Concentration in the Black Sea in the Summer and Autumn Periods according to the Data of the Probe CTD Complex and Direct Measurements Monitoring systems of environment 2023 2 84 91 (in Russian) VolpeV. SilvestriS. MaraniM. Remote sensing retrieval of suspended sediment concentration in shallow waters Remote Sensing of Environment 2011 115 1 44 54 10.1016/j.rse.2010.07.013 KremenchutskiyD.A. KubryakovA.A. Zav'yalovP.O. KonovalovB.V. StanichniyS.V. AleskerovaA.A. Determination of the Suspended Matter Concentration in the Black Sea Using to the Satellite MODIS Data Ekologicheskaya Bezopasnost' Pribrezhny i Shel'fovoy Zon i Kompleksnoe Ispol'zovanie Resursov Shel'fa 2014 29 5 9 (in Russian) SuslinV.V. ChurilovaT.Ya. LeeM. MonchevaS. FinenkoZ.Z. Comparison of the Black Sea Chlorophyll-A Algorithms for SeaWIFS and Modis Instruments Fundamental and Applied Hydrophysics 2018 11 3 64 72 10.7868/S2073667318030085 (in Russian) XiaolongY. ZhongpingL. FangS. MenghuaW. JianweiW. LideJ. ZhehaiS. An Empirical Algorithm to Seamlessly Retrieve the Concentration of Suspended Particulate Matter from Water Color across Ocean to Turbid River Mouths Remote Sensing of Environment 2019 235 111491 10.1016/j.rse.2019.111491 ZamshinV.V. MatrosovaE.R. KhodaevaV.N. ChvertkovaO.I. Quantitative Approach to Studying Film Pollution of the Sea Surface Using Satellite Imagery Physical Oceanography 2021 28 5 567 578 10.22449/1573-160X-2021-5-567-578 SuetinV.S. SuslinV.V. KorolevS.N. KucheryavyiA.A. Analysis of the Variability of the Optical Properties of Water in the Black Sea in Summer 1998 according to the Data of a SeaWiFS Satellite Instrument Physical Oceanography 2002 12 6 331 340 10.1023/A:1021729229168 KopelevichO.V. SheberstovS.V. SalingI.V. VazyulyaS.V. BurenkovV.I. Seasonal and Inter-Annual Changeability of Bio-Optical Characteristics in the Surface Layer of the Barents, White, Black and Caspian Seas from Satellite Data Fundamental and Applied Hydrophysics 2015 8 1 7 16 (in Russian) ArtamonovYu.V. SkripalevaE.A. LatushkinA.A. FedirkoA.V. Multi-Year Average Intra-Annual Cycle of Hydrooptical Characteristics, Chlorophyll A and Surface Temperature of the Black Sea from Satellite Data Sovremennye Problemy Distantsionnogo Zondirovaniya Zemli iz Kosmosa 2019 16 1 171 180 (in Russian) KovalyovaI.V. FinenkoZ.Z. SuslinV.V. Trends of Long-Term Changes in Chlorophyll Concentration, Primary Production of Phytoplankton and Water Temperature in the Shelf Regions of the Black Sea Sovremennye Problemy Distantsionnogo Zondirovaniya Zemli iz Kosmosa 2021 18 4 228 235 (in Russian) KarabashevG.S. EvdoshenkoM.A. Manifestations of the Rim Current, Coccolithophore Blooms, And Continental Runoff in the Long-Term Monthly Mean Distributions of Satellite Reflectance Coefficients of the Black Sea Oceanology 2015 55 1 36 46 10.1134/S0001437015010087 ArtamonovYu.V. LatushkinA.A. SkripalevaE.A. FedirkoA.V. Rim Current Manifestation in the Climatic Fields of Hydro-Optical and Hydrological Characteristics at the Coast of Crimea Proceedings of SPIE. 25th International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics 2019 11208 112084X 10.1117/12.2540803 LomakinP.D. ChepyzhenkoA.I. ChepyzhenkoA.A. Estimation to concentrations of total suspension and dissolved organic matter of the artificial origin in the bays of the Crimea according to optical measurements Ekologicheskaya Bezopasnost' Pribrezhnoy i Shel'fovoy Zon i Kompleksnoe Ispol'zovanie Resursov Shel'fa 2007 15 168 176 (in Russian) LeeM.E. LatushkinA.A. MartynovO.V. Long-Term Transparency Variability of the Black Sea Surface Waters Fundamental and Applied Hydrophysics 2018 11 3 40 46 10.7868/S207366731803005X (in Russian) EfimovaT.V. ChurilovaT.Ya. SkorokhodE.Yu. MoiseevaN.A. ZemlianskaiaE.A. Vertical Distribution of Bio-Optical Properties of the Azov - Black Sea Basin Waters in April - May, 2019 Physical Oceanography 2020 27 5 525 534 10.22449/1573-160X-2020-5-525-534 LatushkinA.A. ArtamonovYu.V. SkripalevaE.A. FedirkoA.V. The Relationship of the Spatial Structure of the Total Suspended Matter Concentration and Hydrological Parameters in the Northern Black Sea according to Contact Measurements Fundamental and Applied Hydrophysics 2022 15 2 124 137 10.48612/fpg4heu-kxbn-gg7t (in Russian) ArtamonovYu.V. SkripalevaE.A. LatushkinA.A. FedirkoA.V. RyabokonD.A. Hydrological Water Structure and Distribution of Total Suspended Matter off the Coast of Crimea in Spring 2021 Ecological Safety of Coastal and Shelf Zones of Sea 2022 4 6 24 StelmakhL. KovriginaN. GorbunovaT. Phytoplankton Seasonal Dynamics under Conditions of Climate Change and Anthropogenic Pollution in the Western Coastal Waters of the Black Sea (Sevastopol Region) Journal of Marine Science and Engineering 2023 11 3 569 10.3390/jmse11030569 LatushkinA.A. ArtamonovYu.V. SkripalevaE.A. FedirkoA.V. Spatial Structure of Turbidity and Chlorophyll-A Fields near the Crimean Coasts according to Natural Measurement In July 2022 Proceedings of the XII All-Russian Conference with International Participation "Current Problems in Optics of Natural Waters" 2023 13 92 96 (in Russian) KrasheninnikovaS.B. BabichS.A. Spatial Distribution of Chlorophyll-A Concentration in Hydrological, Hydrochemical and Hydrological Conditions of the Black Sea in Spring 2021 Proceedings of the T.I.Vyazemsky Karadag Scientific Station - Nature Reserve of the Russian Academy of Sciences 2022 3 13 22 (in Russian) KorchemkinaE.N. MankovskayaE.V. Spectral Reflectance Coefficient, Color Characteristics and Relative Transparency of the Black Sea Waters in Spring, 2019 and 2021: Comparative Variability and Empirical Relationships Physical Oceanography 2024 31 1 3 17 PiontkovskiS.A. ZagorodnyayaYu.A. SerikovaI.M. MinskiI.A. KovalevaI.V. GeorgievaE.Yu. Interannual Variability of Physical and Biological Characteristics of Crimean Shelf Waters in Summer Season (2010-2020) Ecological Safety of Coastal and Shelf Zones of Sea 2024 2 39 59 AleskerovaA.A. KubryakovA.A. GoryachkinYu.N. StanichnyS.V. Propagation of Waters from the Kerch Strait in the Black Sea Physical Oceanography 2017 6 47 57 10.22449/1573-160X-2017-6-47-57 SapryginV.V. BerdnikovS.V. KulyginV.V. DashkevichL.V. MestetskiyL.M. Spatial Distribution and Seasonal Dynamics of the Chlorophyll A Concentration in the Sea of Azov Based on MERIS Images Oceanology 2018 58 5 689 699 10.1134/S0001437018050132 YakushevE.V. ChasovnikovV.K. PodymovO.I. PakhomovaS.V. StunzhasP.A. MurrayJ.W. Vertical Hydro-Chemical Structure of the Black Sea The Black Sea Environment. The Handbook of Environmental Chemistry 2008 5Q 277 307 10.1007/698_5_088