Structure and variability of the total suspended matter concentration field in the Kerch strait

by

P.D. Lomakin, A.A. Chepyzhenko, A.I. Chepyzhenko

Marine Hydrophysical Institute of RAS,

RF, Sevastopol, Kapitanskaya St., 2

E-mail: p_lomakin@mail.ru

DOI: 10.33075/2220-5861-2024-3-20-32

UDC 504+551.465  

EDN: https://elibrary.ru/elkrmg

Abstract:

Based on data of expeditions’ series carried in 2001–2014, the characteristic features of the vertical structure of the total suspended matter (TSM) concentration field are revealed and analyzed and the vertical profiles of this value in the Kerch Strait are typified. The typification is based on a set of characteristic features of the stratification of the field under consideration. Three types of vertical structure have been identified, which differ in the shape of the TSM(z) profile and the statistical indicators of the empirical distribution of the concentration of this substance in the surface layer of the sea. These are the Azov and Black Sea types, characteristic of the waters of the Azov and Black Seas unpolluted by anthropogenic suspended matter, and characterized by a smooth TSM (z) profile as well as a type of structure that identifies waters with an anthropogenic component in the TSM concentration field, which is distinguished by the intrusive shape of the TSM(z) profile and the maximum spatiotemporal variability of the TSM content. Each type is characterized by its own empirical distribution and statistical characteristics of TSS concentration variability. It is shown that the natural TSM concentration field has a frontal structure. The content of suspended matter from 2.4 mg/l in Azov water decreases to 0.8 mg/l in the Black Sea. The main sources of anthropogenic load on the water environment of the strait are identified: wastewater treatment plants, soil dumping zones, ports, cargo terminals, offshore cargo transshipment points, polluted waters of the Sea of Azov.

Keywords: total suspended matter, types of stratification, zoning, pollution, haline front, the Kerch Strait.

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