Andrey G. Zatsepin

• Doctor of Philosophy
• Institute of Oceanology. PP Shirshov Russian Academy of Sciences

On June 8, 2024, the life of Lydia Vasilievna Moskalenko, candidate of geographical sciences, senior researcher of the Laboratory of Hydrophysics and Modeling of the Southern Branch of the Institute of Oceanology of the Russian Academy of Sciences (SB IO RAS), ended. Lydia Vasilievna was a major scientist and a remarkable person who devoted her ent...

The design and principles of operation of the bottom multi-modem station MDS-II, located in the coastal zone (depth of location — 25 m) of the northeastern part of the Black Sea at the Gelendzhik Test Site of IO RAS are described. The station is connected to the coastal center by means of a bottom fiber-optic cable, through which power is supplied...

Rapid rise of salinity is observed in the Black Sea in recent years, with the largest positive trend (0.07 psμ per 10 years) detected in the pycnocline. We use long-term hydrological measurements for 1985–2019 to show that salinity of pycnocline has intense seasonal and interannual variability modulated by the mechanical and convective mixing. In t...

The paper is commemorating Vladimir Grigorievich Krivosheya (1934–2011), a renowned scientist from the Southern Branch of SIO RAS. V. G. Krivosheya was a head of Hydrophysical Department, Ph.D. in Geography, researcher and explorer, whose studies of hydrology and water dynamics of the Mediterranean and Black Seas had significantly improved our unde...

On September 1, 2023, the leading researcher, head of the Scientific Coordination Oceanological Center of the Russian Academy of Sciences Sergey Mikhailovich Shapovalov turns 75 years old. S. M. Shapovalov has been working at the Shirshov Institute of Oceanology of RAS since 1976. For many years he has been engaged in scientific and coordination wo...

In this work, by means of laboratory modeling, the patterns of evolution of baroclinic eddies in a rotating two-layer fluid. Using the original application of the “cylinder method”, single axisymmetric cyclonic and anticyclonic eddies were produced in the upper layer, and their evolution was traced over 100 or more platform rotation periods.

Purpose. The study is purposed at calculating and analyzing the characteristics of short-period internal wave (IW) packages based on the long-term measurements of vertical temperature distributions by a cluster of three moored thermoresistor chains spaced apart from each other and placed on the Black Sea shelf in the Golubaya Bay area (the Southern...

The paper analyzes quasiperiodic upwellings and downwellings on the shelf and upper part of continental slope of the northeastern Black Sea. It is shown that these processes are related to changes in intensity and direction of alongshore current and the following geostrophic adjustment of the density field. The source of such changes is the meander...

The paper analyzes quasiperiodic upwellings and downwellings on the shelf and upper part of continental slope of the north-eastern Black Sea. It is shown that these processes are related to changes in intensity and direction of alongshore current and the following geostrophic adjustment of density field. The source of such changes is a meandering o...

In this work, by means of laboratory modeling, the patterns of evolution (baroclinic instability and/or viscous degeneration) of mesoscale non-frontal baroclinic eddies, or open ocean eddies (without a core with the water of different density) were revealed. The experiment was provided in a two-layer salinity-stratified aquatic environment in a cyl...

Cyclonic eddies in the ocean often increase primary production and phytoplankton biomass. The main mechanism is the rise of the nutricline in the cyclone's core, which determines the intensification of the ascending flow of deep nutrients into the photic layer. However, some cyclones suppress primary productivity, and the natural processes underlyi...

This paper is concerned with the analysis of the long-term regular time series of current velocity and conductivity, temperature, and depth (CTD) profiles, measured with the moored autonomous profiler Aqualog over the upper part of the continental slope at a fixed geographical location in the Northeastern Black Sea. This study focuses on the fine s...

This article describes a new tethered profiler Winchi designed as a compact, easily deployed device for measurements of aquatic parameters from 60 m depth to air-water boundary. The profiler is capable of working from subsurface buoy or bottom anchor. It can obtain the long time series of the depth profiles of aquatic parameters during 6 months if...

In this study, a laboratory experiment was conducted to investigate quantitatively turbulent exchange between two quasi-homogeneous layers of equal thickness and different density (salinity), as well as the fine structure of the density transition zone (interface) between the layers. The fluid was continuously stirred by a system of horizontally os...

A multi-proxy study of core Ash-2012-02 from the outer shelf of the northeastern Black Sea allowed us to define recent environmental changes, on a seven-year period resolution for the last 300 years. The age model of the core Ash-2012-02 based on radionuclide (²¹⁰ Pb, ¹³⁷ Cs, ²⁴¹ Am) measurements suggests an average sedimentation rate of 1.4 mm/y a...

The article is devoted to the 65th anniversary of the 25th cruise of the R/V “Vityaz” to the Western Pacific Ocean under the program of the International Geophysical Year and the 95th anniversary of the participant of this voyage, the outstanding Soviet oceanologist Konstantin Nikolaevich Fedorov. Based on the materials of well-known publications,...

Biogeochemical cycles of carbon transformation throughout the euphotic zone of the sea are controlled by physical processes, e.g., daily thermocline, variation in solar irradiance, thermohaline convection, and intermittent mixing. These processes should be regularly observed with sufficient time resolution at fixed geographical locations. This stud...

The basic aim of the investigation is to study the regularities of fine structure layering of the stratified fluid (i.e., the oceanic pycnocline) under vertically homogeneous turbulent stirring. By means of physical (laboratory) modeling turbulent exchange through the density (salinity) interface, as well as the structure of this interface between...

This article is dedicated to the 90th anniversary of Ivan Mikhailovich Ovchinnikov (1931– 2000) – Doctor of Geographical Sciences, former Director of the Black Sea Experimental Research Station (CHENIS) Institute of Oceanology of the USSR Academy of Sciences, a remarkable scientist-oceanographer, researcher of the Equatorial counterflow, mesoscale...

On May 20, 2021, the head of the Laboratory of Lithodynamics and Geology of the Southern Department of the Institute of Oceanology of the Russian Academy of Sciences, Professor, Doctor of Geographical Sciences, prominent scientist and public figure Kosyan Ruben Derenikovich is 75 years old. R.D. Kosyan is a leading Russian expert in the field of st...

Purpose. The paper is aimed at assessing salinity and temperature variability in the upper 300-meter layer of the northeastern part of the Black Sea based on the analysis of the archival and modern expeditionary data. Methods and Results. The data on the cross-sections “coast – sea center” (with the length of 70–110 nautical miles) performed from 1...

Purpose. The paper is aimed at assessing salinity and temperature variability in the upper 300-meter layer of the northeastern part of the Black Sea based on the analysis of the archival and modern expeditionary data. Methods and Results. The data on the cross-sections “coast – sea center” (with the length of 70–110 nautical miles) performed from 1...

Feasibility study of a long-lived autonomous sea observatory on the basis of a stabilized spar buoy is presented. The buoy design is developed to sustain harsh weather and hydrodynamic conditions of near-shore of the NorthEastern Black Sea with expected lifetime over 10 years. It has the following dimensions: diameter of 2.4 m, length of 45 m, pres...

Рассмотрены разные типы мезомасштабной вихревой динамики с точки зрения их влияния на количество и таксономическую структуру планктона, в основном фитопланктона. Вихревые структуры всех видов, включая циклонические, антициклонические, линзовидные антициклонические и фронтальные вихри, а также дипольные структуры активно воздействуют на планктон. Ра...

The article is devoted to the development of an autonomous profiling system for measuring the aquatic en ironment under ice. The system moves up and down in the water column along a cable with a load at the lower end, which is lowered into a lane in the ice. The system carrier is designed for transporting an acoustic Doppler current profiler and a...

Different types of mesoscale eddy dynamics are considered in the paper from the viewpoint of their effect on the plankton (mainly phytoplankton) amount and its taxonomic structure. The eddy structures of all types, including cyclonic, anticyclonic, water-body anticyclonic and frontal ones, as well as the dipole structures, actively affect plankton....

A technique for studying the spatiotemporal variabilities of the temperature of the aquatic environment of the Black Sea shelf zone using a cluster of anchored of temperature sensors chains (thermochains) is described. Consisting of three spaced-apart thermochains, this cluster is employed in the inner shelf of the north-eastern part of the Black S...

In 2019, a new instrument was included in the multifunctional measuring complex at the Gelendzhik Research Site (Shirshov Institute of Oceanology, Russian Academy of Sciences, IO RAS), which allows automatic measurement of the hydrophysical parameters of the aquatic environment from the bottom layer to the surface of the waterbody with on-line tran...

Automatic Profiling System for under Ice Measurements A. G. Ostrovskii, A. G. Zatsepin, D. A. Shvoev, S. V. Volkov, b, O. Yu. Kochetov, V. M. Olshanskiy Shirshov Institute of Oceanology, Russian Academy of Sciences, Moscow, Russia Severtsov Institute of Ecology and Evolution, Russian Academy of Sciences, Moscow, Russia #e-mail: osasha@ocean.ru The...

In 2019, the 110th anniversary of the birth of the outstanding Soviet oceanologist – Professor Vladimir Shtokman, with whose name is closely connected to the formation and development of dynamic oceanology in our country, is celebrated. In the same year, another significant date is celebrated – 40 years from the date of the introduction of the R/V...

In this paper, we analyze seasonal and interannual variability of vertical turbulent diffusion coefficient (Kt). Our calculations are based on the time series from 2013 to 2016, obtained in the north-eastern Black Sea within the depth range of 30–220 m by using an Aqualog profiler. The synchronized measurements included vertical profiles of sea tem...

The Black Sea is one of the largest land-locked basins in the world. Due to the vulnerability of its unique marine ecosystem, accurate long-term modelling of its hydrodynamics is needed. In this study, we first compare the skills of four NEMO based Black Sea models in free-run which use different discretization schemes. We find that the most accura...

The development of a winch-type underwater vehicle for automatic profiling of the water column from the sea bottom to the surface with a real-time data transmission system is presented. The profiler is parked above the bottom anchor (maximum working depth is 60 m) and can regularly ascend to the sea surface, making measurements of the vertical prof...

This issue of the Journal of Oceanological Research contains mainly articles previously presented in the form of reports at the International Symposium “Mesoscale and Submesoscale Processes in the Hydrosphere and Atmosphere” (MSP-2018), dedicated to the 90th anniversary of the outstanding scientist, corresponding member of the USSR Academy of Scien...

The paper presents an overview of the existing hypotheses about the formation areas and the distribution mechanisms of the cold intermediate layer (CIL) in the Black Sea. The testing of the statistical hypothesis about the relationship of the CIL parameters in the shelf-slope zone of the Black Sea Northeastern part with the temperature of the atmos...

The preliminary results of an experimental study of a mechanism of the Black Sea anoxic layer ventilation related with the descent of oxygen-containing water down the bottom slope in Ekman boundary layer are presented. To study this mechanism, several automatic measuring stations were installed at the bottom of the shelf-continental slope zone in t...

Цель: Исследована пространственно-временная изменчивость толщины верхнего квазиоднородного слоя (ВКС) в различных районах Черного моря и определена ее связь с динамикой вод и атмосферным воздействием за 1985-2017 гг. Методы и результаты: На основе архива гидрологических данных за 1985-2017 гг, включающего измерения судовых экспедиций, буев Argo и з...

Purpose. Spatio-temporal variability of the mixed layer depth (MLD) in different areas of the Black Sea in 1985–2017, its relationship with basin dynamics and atmospheric forcing are studied. Methods and Results. The study is based on the hydrological data archive for 1985–2017 including the measurements of the ship expeditions, the Argo buoys and...

Введение. Представлен анализ результатов численных расчетов развития инерционных колебаний в штормовой период в восточной части Черного моря в сравнении с данными наблюдений и аналитическими решениями. Расчеты подтверждают значительный вклад инерционных движений в формирование полей скорости течений. Показано, что инерционные движения не оказывают...

Представлен проект автономной ледовой океанологической станции. Станция предназначена для мониторинга и исследования морской среды подо льдом в Северном Ледовитом океане. Профилирующий носитель должен перемещаться вверх и вниз в водяной толще вдоль троса с грузом на нижнем конце, который вывешивается с буя-держателя вмороженного в дрейфующую льдину...

Представлена разработка подводного аппарата лебедочного типа для автоматического зондирования водной толщи до поверхности моря с системой передачи данных измерений в реальном времени.

In the northeastern Black Sea the search was performed for living eukaryotic organisms (micro- and meiobenthos) in hypoxic and anoxic conditions as well as measurement of O2 in the bottom water layer and in the upper layer of sediments. The results have shown the presence of a deep maximum abundance of zoobenthos in a depth range of 215–244 m. This...

There are a number of Black Sea ocean models which use one of the standard discretization schemes. None of the current methods are free from errors, the most well-known are either the pressure gradient force (for terrain following systems) and overmixing over the continental slope (for z-coordinate systems). Both methods are also prone to the conta...

Introduction. Analysis of numerical simulation of the inertial oscillations evolution in a storm period in the northeastern Black Sea is represented in comparison with the observations and the analytical solutions. The simulations confirm significant contribution of the inertial motions to formation of the velocity fields. It is shown that inertial...

Four consecutive strong wind events in August 2015 caused an anomalous phytoplankton bloom in the Black Sea, which occupied almost the entire eastern basin. Maximal surface chlorophyll A concentration (Chl-A) in the bloom area exceeded 5 mg/m3 in comparison with 0.6 mg/m3 in the surrounding waters. The anomalous bloom was observed for over 3 months...

The paper presents an analysis of the acoustic backscattering variability measured by the moored acoustic Doppler current profiler (ADCP). The ADCP operated at the test site of the Shirshov Institute of Oceanology RAS near Gelendzhik in 2011–2012. An amplitude calibration of the ADCP allows minimizing the errors connected with the changing sensor d...

The observed evidence of the implementation of three different mechanisms of the submesoscale eddies generation in the Black Sea previously studied by the field research and laboratory modeling is presented. These mechanisms are the following: (1) horizontal shear instability of the surface current; (2) flow separation behind capes and peninsulas;...

This paper presents the variability of wind-driven upwelling based on results of the coastal upwelling criterion analysis for the Gelendzhik region of the Black Sea for 1979–2016 years. The calculations of the criterion are based on the wind data from reanalysis of NCEP-CFSR. The proposed method is used for the analysis of long-term upwelling varia...

The paper in summary presents a description of the history of the emergence and development in Russia of ocean hydrophysics, one of the main parts of the multidisciplinary science - Oceanology. The beginning of hydrophysics in Russia was laid by the works of the great Russian scientist Mikhail Vasilyevich Lomonosov, who in the second half of the 18...

On June 7, 2018, a sub-mesoscale anticyclonic eddy induced by the wind (north-east) was registered on the shelf in the area of the city of Gelendzhik. With the help of field multidisciplinary expedition ship surveys, it was shown that this eddy exists in the layer above the seasonal thermocline. At the periphery of the eddy weak variability of hydr...

ABSTRACT This model provides a periodic measurement of temperature profiles from the bottom layer to the water surface in a programmable mode using temperature and pressure sensors placed in a single streamlined body (probe). The probe is connected by a thin resistant cable to the bottom block of the station, including a winch and an electronic uni...

SUMMARY OF THE INTERNATIONAL SYMPOSIUM «MESOSCALE AND SUBMESOSCALE PROCESSES IN THE HYDROSPHERE AND ATMOSPHERE» (MSP-2018) A.G. Zatsepin, A.I. Ginzburg, A.G. Kostianoy, S.A. Sviridov The International Symposium «Mesoscale and Submesoscale Processes in the Hydrosphere and Atmosphere» (MSP-2018), dedicated to the 90th anniversary of the outstanding...

Warm winters have recently become common over the Black Sea, leading to the risk of shoaling oxygen penetration. The insufficient supply of oxygen to the near-bottom layer may result in a decrease in faunal abundance. However, there is a lack of data on the temporal variations in oxygen throughout the water column over short timescales of hours to...

This paper presents the variability of wind-driven upwelling based on results of the coastal upwelling criterion analysis for the Gelendzhik region of the Black Sea for 1979–2016 years. The calculations of the criterion are based on the wind data from reanalysis of NCEP-CFSR. The proposed method is used for the analysis of long-term upwelling varia...

Приводятся результаты моделирования термохалинной структуры и течений вод северо-восточной части Черного моря на основе общебассейновой (МГИ) и региональной (РОМ) численных моделей, совмещенных с использованием технологии «вложенных сеток». Модельные расчеты сравниваются с данными наблюдений на морских гидрометеостанциях (ГМС) российского Кавказско...

Thermochains for Black Sea hydrophysical studies are described, and the features of their displacement at the moored buoy station with subsurface buoyancy are considered. A technique for calibrating the temperature sensors is described and their stability is estimated by comparing the obtained calibration coefficients with the values established in...

The time series of vertical profiles of hydrophysical parameters and dissolved oxygen are critical for identifying trends in water column stratification, mixing, and ventilation in the Black Sea. Due to global warming, warm winters have recently become common over the Black Sea, and the temperature in the cold intermediate layer (CIL) is increasing...

Laboratory experiments on studying the downwelling coastal current above the inclined bottom are conducted in the tank placed at a rotating platform. The current is formed by a source of constant flow of water with the same density (barotropic case) or the lower one (baroclinic case) as compared to the water in the tank. It is revealed that both in...

К.Н. Федоров – выдающийся советский физик-океанолог, внесший заметный вклад в отечественную и мировую науку об океане. Комплексные исследования на основе натурных измерений, лабораторного моделирования и спутниковой информации, проведенные под его руководством в созданных им коллективах – Лаборатории экспериментальной физики океана (1974) и Отделе...

Приводятся результаты моделирования термохалинной структуры и циркуляции вод в северо-восточной части Черного моря на основе общебассейновой и региональной численных моделей. Модельные результаты сравниваются с данными гидрометеостанций российского Кавказского побережья и данными заякоренного зондирующего комплекса «Аквалог» Института океанологии и...

Results of the work on remote monitoring of sea surface state in the Taman Bay using X-band incoherent navigation radar FURUNO 1715 in 2009–2011 are presented. The Taman Bay is characterized by a short wave fetch and typical wave heights less than 1 m, when radar spectral methods for restoring the wave height fail to work. Therefore, regarding the...

The paper presents an analysis of the acoustic backscattering variability measured by the moored acoustic Doppler current profiler (ADCP). The ADCP operated at the test site of the Shirshov Institute of Oceanology RAS near Gelendzhik in 2011–2012. An amplitude calibration of the ADCP allows minimizing the errors connected with the changing sensor d...

Краткое изложение жизненного пути и основополагающих научных работ (по тонкой термохалинной структуре вод океана, фронтам, изменчивости приповерхностного слоя океана) выдающегося советского физика-океанолога, члена-корреспондента АН СССР К.Н. Федорова, успешно сочетавшего активную научную деятельность на основе комплексного подхода к изучению океан...

Г.И. Баренблатт – выдающийся советский и российский механик и математик, чьи научные работы в области проблем механики сплошной среды хорошо известны международному научному сообществу и отмечены многими международными почетными наградами и премиями. В области океанологии им выполнен ряд исследований динамики турбулентности стратифицированной жидко...

There are results of complex current velocity measurements presented in this paper. Experiments were held on hydrophysic Black Sea IORAS test site (near Gelendzhik city) in September-October 2015 and in April 2016. Current velocity was measured by different equipment: high frequency (HF) radar Sea Sonde (25 MHz), X-band radar (9.7 GHz), two moored...

Laboratory investigation of eddy formation mechanism due to spatially non-uniform wind impact was fulfilled. Experiment was provided in a cylindrical and a square form tank filled with homogeneous or stratified fluid and displaced on a rotating platform. In the absence of the platform rotation, an impact of the single air jet lead to the formation...

The propagation of the Danube River plume has strong interannual variability that impacts the local balance of nutrients and the thermohaline structure in the western Black Sea. In the present study, we use a particle-tracking model based on satellite altimetry measurements and wind reanalysis data, as well as satellite measurements (SeaWiFS, MODIS...

The results of a joint analysis of the synchronous-profile ensemble of density and current velocity measured using the autonomous moored Aqualog profiler at the Gelendzhik experimental site of the Shirshov Institute of Oceanology in 2013–2015 are presented. The distribution of probability density of current velocity by directions reveals the presen...

Since 2010, the P.P. Shirshov Institute of Oceanology RAS (SIO RAS) in Gelendzhik maintains the research (observational) site for year round multi-disciplinary studies and monitoring of the marine environment in the coastal zone. Analysis of the data obtained at the observational site revealed the existence of well pronounced short-term variability...

Представлен обзор разработок автономных профилирующих подводных аппаратов (АППА), которые ведутся в Институте океанологии им. П.П. Ширшова РАН (ИО РАН). Цель работ создание «линейки» роботизированных профилирующих носителей океанологической и гидроакустической аппаратуры для проведения научных и прикладных исследований в Мировом океане и в окраинны...

This work presents the description and results of drifter experiments which were held in coastal zone of the Black Sea every summer and sometimes in autumn since 2013. Surface GSM/GPS drifters were used for observation coastal currents with spatial resolution 100–200 m and temporal variability from 5-10 minutes . Some parameters of sub-mesoscale ed...

This paper deals with observations of the ocean potential density anomaly and the ocean current velocity that were obtained by using the moored profiler Aqualog at experimental site of IO RAS in the northeastern Black Sea in 2013–2015. The distribution of probability density of current velocity via direction indicates two maxima in the southeast an...

Feasibility study of a long-lived autonomous sea observatory on the basis of a stabilized spar buoy is presented. The buoy design is developed to sustain harsh weather and hydrodynamic conditions of near-shore of the NorthEastern Black Sea with expected lifetime over 10 years. It has the following dimensions: diameter 2.4 m, total length 45 meters,...