Spatial and Temporal Variability of Hydrophysical Parameters of the Northern Black Sea Waters from 2021 Measurements

A. N. Morozov*, E. V. Mankovskaya

Marine Hydrophysical Institute of RAS, Sevastopol, Russia

* e-mail: anmorozov@mhi-ras.ru

Abstract

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.

Keywords

Black Sea, current velocity, density, temperature, buoyancy frequency, kinetic energy, cold intermediate layer

Acknowledgments

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 Vodyanitskiy (the core facility R/V Professor Vodyanitskiy of A.O. Kovalevsky Institute of Biology of the Southern Seas of RAS).

For citation

Morozov, A.N. and Mankovskaya, E.V., 2023. Spatial and Temporal Variability of Hydrophysical Parameters of the Northern Black Sea Waters from 2021 Measurements. Ecological Safety of Coastal and Shelf Zones of Sea, (4), pp. 6–18.

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