Ecological Safety of Coastal and Shelf Zones of Sea Ecological Safety of Coastal and Shelf Zones of Sea 2413-5577 20230401 Research Article Spatial and Temporal Variability of Hydrophysical Parameters of the Northern Black Sea Waters from 2021 Measurements Morozov A. N.
Russian Federation
annorozov@mhi-ras.ru Mankovskaya E. V.
Russian Federation
emankovskaya@mhi-ras.ru Marine Hydrophysical Institute of RAS Sevastopol Russian Federation 20 12 2023 2023 4 6 18 16 06 2023 11 10 2023 03 07 2023 Copyright © 2023, A. N. Morozov, E. V. Mankovskaya 2023 A. N. Morozov, E. V. Mankovskaya https://creativecommons.org/licenses/by-nc/4.0/ https://ecological-safety.ru/en/repository/issues/2023/04/01/

The paper uses the results of measurements of salinity, temperature and current velocity profiles in three expeditions of the R/V Professor Vodyanitsky (22 April - 08 May, 29 June - 10 July, 03-19 September 2021) in the central sector of the northern Black Sea (31°-37°E, 43°-45°N) to study features of the spatial distribution of hydrophysical parameters in various seasons of 2021 and to compare them with the data of previous expedition studies in 2016-2019. The horizontal distributions of currents in the spring, summer and autumn expeditions of 2021 were analysed. The averaged profiles of current velocity, density, temperature, buoyancy frequency, and kinetic energy were considered. The vertical structure of water temperature reflects the persistent warming trend of the cold intermediate layer core derived earlier from the 2016-2019 data. Based on all 2016-2021 measurements, the vertical profiles of kinetic energy show decreasing values in the upper sea layer in summer and increasing values in spring, autumn and winter seasons of the year. The profiles can be approximated by linear relationships that cross zero at a density of 16.75 kg/m³. The seasonal variability of the average kinetic energy is traceable to the depth of occurrence of this particular isopycnic.

 Black Sea current velocity density temperature buoyancy frequency kinetic energy cold intermediate layer The work was performed under state assignment of MHI RAS on topics no. FNNN-2021-0003 "Operational oceanology", no. FNNN-2021-0005 "Coastal research"; the data were obtained during the 116th, 117th and 119th cruises of the R/V Professor Vodyanitsky (the core facility R/V Professor Vodyanitsky of A.O. Kovalevsky Institute of Biology of the Southern Seas of RAS).

About the authors:

Alexey N. Morozov, Senior Research Associate, Marine Hydrophysical Institute of RAS (2 Kapitanskaya St., Sevastopol, 299011, Russian Federation), PhD (Tech.), ORCID: 0000-0001-9022-3379, Scopus Author ID: 7202104940, ResearcherID: ABB-4365-2020, annorozov@mhi-ras.ru

Ekaterina V. Mankovskaya, Senior Research Associate, Marine Hydrophysical Institute of RAS (2 Kapitanskaya St., Sevastopol, 299011, Russian Federation), PhD (Tech.), ORCID: 0000-0002-4086-1687, Scopus Author ID: 57192647961, ResearcherID: AAB-5303-2019, emankovskaya@mhi-ras.ru

Contribution of the authors:

Alexey N. Morozov – problem statement, processing, analysis and description of the study results, article text editing

Ekaterina V. Mankovskaya – measurement data processing, collection of information to study, discussion of the results, preparation of the article text and graphic materials

All the authors have read and approved the final manuscript.

Article text not included.

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