Role of suspended matter in controlling beryllium-7 (7Be) in the Black Sea surface layer

2021 ◽  
pp. 103513
Author(s):  
Dmitrii A. Kremenchutskii ◽  
Gennady F. Batrakov ◽  
Illarion I. Dovhyi ◽  
Yury A. Sapozhnikov
Keyword(s):  
Surface Layer ◽  
Black Sea ◽  
Suspended Matter ◽  
Sea Surface ◽  
The Black Sea

scholarly journals Assessment of Applicability of Satellite-Derived Ocean Color Data for Studying Variability of Total Suspended Matter in the Surface Layer of the Deep Part of the Black Sea

2020 ◽  
Vol 27 (5) ◽  
Author(s):  
A. S. Kukushkin ◽  
V. V. Suslin ◽  
Keyword(s):  
Surface Layer ◽  
Black Sea ◽  
Suspended Matter ◽  
Temporal Variability ◽  
Ocean Color ◽  
Total Suspended Matter ◽  
The Black Sea ◽  
Backscattering Coefficient ◽  
Color Data

Purpose. Studies of spatial-temporal variability of total suspended matter are necessary for understanding the biochemical processes which form and support stable functioning of a marine ecosystem. The aim of the work is to assess applicability of satellite data for studying total suspended matter variability in the surface layer of the deep part of the Black Sea. Methods and Results. Application of the regression analysis yielded the linear regression equations that unite the in situ measurements of the total suspended matter concentrations in the surface layer in the northeastern (June, 2005–2015) and western (November, 2016, 2017 and December, 2017) deep sea areas, and the regional satellite products (the particulate backscattering coefficient, the absorption coefficient of colored detrital matter and the chlorophyll a concentration). Based on the measured and calculated data arrays, the maps of the total suspended matter concentrations in the surface layer of the northeastern Black Sea were constructed. The interannual changes in the in situ measured concentrations of the total suspended and lithogenic matters, as well as in the quasi-synchronous satellite regional products (the light absorption coefficient of colored detrital matter at 490 nm and the particulate backscattering coefficient at 555 nm) in June, 2005–2015 were considered. High total suspended matter concentrations were noted in 2012, just when extreme growth of the coccolithophorid population was observed in the Black Sea. The correlation coefficients were used to evaluate whether the relation between the total suspended matter concentration and the individual analyzed parameters was fast. Conclusions. Spatial distributions of the measured and calculated total suspended matter contents showed satisfactory agreement. In course of the whole observation period, difference between the values of the measured and calculated total suspended matter concentrations was on average 6–23 %. Possibility of application of the satellite-derived ocean color data for studying spatial-temporal variability of the total suspended matter content is shown.

scholarly journals CARBON-TO-CHLOROPHYLL-A RATIO IN THE PHYTOPLANKTON OF THE BLACK SEA SURFACE LAYER: VARIABILITY AND REGULATORY FACTORS

2018 ◽  
Vol 17 ◽  
pp. 60-73 ◽  
Author(s):  
Liudmila V. Stelmakh ◽  
Tatiana I. Gorbunova
Keyword(s):  
Surface Layer ◽  
Surface Water ◽  
Black Sea ◽  
Water Layer ◽  
Taxonomic Composition ◽  
Sea Surface ◽  
The Black Sea ◽  
Summer Period ◽  
Upper Mixed Layer ◽  
Main Influence

Based on the research, conducted in the Black Sea during period of time from 2000 to 2011, seasonal dynamic of C:Chl a ratio and its spatial variability in nano- and microphytoplankton of surface water layer (0–0.5 m) had been analyzed. Maximum values of this parameter were observed in summer, and minimum ones – in winter. Intermediate values of C:Chl a were marked in spring and autumn. The main reasons for variability of the ratio between an organic carbon and chlorophyll a are the light, and different size of phytoplankton and its taxonomic composition. In coastal areas of the sea during summer period, when average values of light intensity in the upper mixed layer are above 20 E·m-2·day-1, size and taxonomic composition of phytoplankton provide main influence to C:Chl a ratio.

scholarly journals Дистанционная регистрация следа судна по проявлениям на морской поверхности и приповерхностном слое морской среды и атмосферы

2019 ◽  
Vol 127 (10) ◽  
pp. 616
Author(s):  
В.Н. Носов ◽  
С.Б. Каледин ◽  
С.Г. Иванов ◽  
В.И. Тимонин
Keyword(s):  
Surface Layer ◽  
Black Sea ◽  
Sea Surface ◽  
The Black Sea ◽  
Natural Conditions ◽  
Near Surface ◽  
Ship Tracks ◽  
Surface Vessel

AbstractThe tracking of hydrodynamic disturbances within the sea surface and near-surface layer and surface layer aerosol is performed using three different installations, a laser locator, photometer of sea brightness, and elastic aerosol lidar. The experiments are carried out under the natural conditions of the Black Sea polygon. A surface vessel was a source of hydrodynamic perturbations in the form of a lagging track. The results reveal the efficiency of the methods used to record ship tracks in three media.

scholarly journals Feature of formation of the Black Sea surface layer temperature during air cold intrusions

2019 ◽  
Vol 487 (4) ◽  
pp. 443-447
Author(s):  
A. A. Sizov ◽  
T. M. Bayankina
Keyword(s):  
Surface Layer ◽  
Black Sea ◽  
Mixed Layer ◽  
Sea Surface ◽  
The Black Sea ◽  
Intermediate Water ◽  
Seasonal Thermocline ◽  
Upper Mixed Layer ◽  
Surface Layer Temperature

Application of the results of the drifter observations performed in the western Black Sea permitted to show that during air cold intrusions (CI) in winter accompanied by the wind (10 m/c and more), the upper mixed layer (UML) was cooled by 0,1-0,2 °C in course of a day. At that the seasonal thermocline (ST) and the cold intermediate water (CIW) sink deeper; after CI is over these layers rise to the depths smaller than their previous ones. It results in decrease of temperature in UML and its increase, as compared to the period preceding CI, in the layer below ST. The process of the sea upper layer mixing is explained by the fact that anti-cyclonic mesoscale vortices are involved in it.

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