Field of the Colored Dissolved Organic Matter Concentration in the Sea of Azov and the Kerch Strait Waters Based on Optical Observations

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

Marine Hydrophysical Institute, Russian Academy of Sciences, Sevastopol, Russian Federation

✉ e-mail: annachep87@yandex.ru

Abstract

The notions on the sources and structure of the colored dissolved organic matter concentration field in the Sea of Azov and the Kerch Strait waters are first obtained on the basis of the results of several expeditions carried out by the scientists of Marine Hydrophysical Institute. It is shown that in the Sea of Azov the main natural source of this substance is related to the river runoff, particularly significant for the northern and eastern coasts; in the Kerch Strait – with the Black Sea subsurface waters. It was found that transformed river waters with high dissolved organic matter content do not penetrate into the southern sea area and the Kerch Strait, whereby in the predominant part of the Azov Sea waters the colored dissolved organic matter typical concentration defined by the optical methods turns out to be by an order lower than the available calculated estimates. Our measurement data for the Black Sea waters were in line with the earlier defined dissolved organic matter content by chemical methods. In the colored dissolved organic matter field of the Kerch Strait the frontal zone coinciding with the main thermohaline front, that delimits the interacting Black Sea and Azov Sea waters, is revealed. The lens with high colored dissolved organic matter concentration related to anthropogenic influence of harbors and industrial plants situated at the shore, the sewage collectors, cargo terminals, off-shore transshipment sites and ground landfills are revealed.

Keywords

colored dissolved organic matter, the Sea of Azov, the Kerch Strait

For citation

Lomakin, P.D., Chepyzhenko, A.I. and Chepyzhenko, A.A., 2016. Field of the Colored Dissolved Organic Matter Concentration in the Sea of Azov and the Kerch Strait Waters Based on Optical Observations. Physical Oceanography, (5), pp. 71-83. doi:10.22449/1573-160X-2016-5-71-83

DOI

10.22449/1573-160X-2016-5-71-83

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