Features of the distribution of organic matter in the waters of the Black Sea

Агатова, А. Р.; Lapina, N. M.; Torgunova, N. I.

doi:10.29006/978-5-91522-473-4.2018.146

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Section: Discussion Of the Resultsmentioning

confidence: 64%

“…Note that, similarly to the fDOM concentration field structure, the subsurface maximum in the Black Sea was revealed in the DOC concentration field [1,15]. According to [1], this extremum, located at a depth of 10-50 m, is typical for the Black Sea Rim Current waters. The authors of [15] determined the time-stable maximum of DOC concentration detected at a depth of 20-60 m as a characteristic sign of vertical stratification of this value field in the Black Sea.…”

Section: Discussion Of the Resultsmentioning

confidence: 64%

“…Dissolved and suspended organic carbon (DOC and SOC, respectively) are representative indicators of the DOM and SOM content in seawater, which have been studied in the Azov-Black Sea basin since the 1940s to the present. A detailed review of publications concerning the study of the distribution of these indicators for the Black Sea waters obtained from various sources by different methods is given in [1]. In [2], statistical information on the DOC content in certain regions of the Sea of Azov and in the Kerch Strait is presented.…”

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confidence: 99%

“…There was an attempt of oceanographic research of SOC, undertaken by VNIRO employees, based on data obtained in two expeditions (15 th cruise of R/V Vityaz in April 1988 and 24 th cruise of R/V Akademik Knipovich in June -July 1989). Maps of the spatial distribution of DOC concentration in the Black Sea, according to the authors of [1], are schematic due to the significant spatial-temporal variability of the studied value and the insufficient volume of empirical data sample. At the same time, they made it possible to obtain the first ideas about the DOC content field structure in the coastal area and in the oxygen zone of the deep-water Black Sea.…”

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Structure of the Field of the Colored Dissolved Organic Matter Concentration in the Kerch Strait

Lomakin¹,

Чепыженко²,

Chepyzhenko³

2021

PhO

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Purpose. Using the data obtained in the expeditions, 2001–2014, the authors intend to identify the typical features of vertical structure of the colored dissolved organic matter (fDOM) concentration field in the Kerch Strait, to type the fDOM(z) profiles, to zone the region under consideration according to a given set of the qualitative features, and also to determine the features of statistical characteristics of the fDOM concentration distribution on the sea surface layer for the water areas with a typical structure. Methods and Results. The typing was carried out by the method of visual expert assessment of the curves of vertical distribution of concentration of the considered value. It was based on analyzing the fDOM(z) profile shapes. To reveal the boundaries of the areas with typical stratification of the fDOM content field, the thermohaline field structure was analyzed. Three types of water vertical structure were identified; they differed in the fDOM(z) profile shape and in statistical indices of empirical distribution of this substance concentration on the sea surface. These are the Azov Sea and the Black Sea types peculiar to the Azov and Black seas waters not contaminated by dissolved organic matter, and the type, the structure of which identifies the waters containing the anthropogenic component in the concentration field of the analyzed value. The latter type is characterized by a special intrusive shape of the fDOM(z) profile. For each of the identified stratification types, the histograms of the fDOM concentration distribution on the sea surface were calculated. Conclusions. The fDOM(z) profiles were typed. The Kerch Strait water area was zoned in accordance with a given set of the preliminary revealed qualitative features. The boundaries of the areas with typical stratification and their displacements were determined. It is shown that each structure type has its own statistical distribution of concentration of the considered value on the sea surface

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Section: Discussion Of the Resultsmentioning

confidence: 64%

Section: Discussion Of the Resultsmentioning

confidence: 64%

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confidence: 99%

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confidence: 99%

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