Zubov State Oceanographic Institute

Moscow, Russia

Zubov State Oceanographic Institute

Moscow, Russia
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Lebedev K.V.,RAS Shirshov Institute of Oceanology | Sarkisyan A.S.,RAS Shirshov Institute of Oceanology | Nikitin O.P.,Zubov State Oceanographic Institute
Izvestiya - Atmospheric and Ocean Physics | Year: 2016

Calculation results are presented for long-term mean annual surface currents in the North Atlantic based on direct drifter measurements and numerical experiments with the ocean general circulation model using both climatic arrays of hydrological data World Ocean Atlas 2009 and Argo profiling data. The calculations show that the technique suggested for model calculations of oceanographic characteristics of the World Ocean with the use of Argo data significantly improves the climatic fields of the temperature and salinity even on a coarse grid. The comparison of the model calculation results with drifter data showed that the temperature and salinity fields found from Argo data with the use of data variational interpolation on a regular grid allow the calculation of realistic currents and can be successfully used as initial conditions in hydrodynamic models of the ocean dynamics. © Pleiades Publishing, Ltd., 2016.

Feniova I.Y.,RAS Severtsov Institute of Ecology | Razlutsky V.I.,Scientific and PracticalCenter for Bioresources | Palash A.L.,Scientific and PracticalCenter for Bioresources | Tunowski J.,Stanislaw Sakowicz Inland Fisheries Institute | Zilitinkevich N.S.,Zubov State Oceanographic Institute
Zoologicheskii Zhurnal | Year: 2016

Vertical distribution of crustacean species was studied in three meso-eutrophic lakes with different thermal regimes (Poland). The vertical distribution demonstrated that the biomasses of both cladocerans and copepods mainly concentrated in epilimnion due to the low concentration of dissolved oxygen in meta- and hypolimnion of all the studied lakes. Diurnal vertical migrations in these lakes were not registered. We suggest that the lower biomass of crustaceans in heated Lake Lichenskie than that in the other two lakes was caused by enhanced temperature in epilimnion of this lake and a lack of the possibility to use metalimnion as a refuge from high temperature in epilimnion and predators.

Feniova I.Y.,RAS Severtsov Institute of Ecology | Aibulatov D.N.,Moscow State University | Zilitinkevich N.S.,Zubov State Oceanographic Institute
Inland Water Biology | Year: 2013

Simulation modeling was performed to study the impact of individual variability on the population dynamics of particular cladoceran populations and the outcome of interspecific competition at low and high temperatures. The study was performed on one species of small size (Ceriodaphnia quadrangula O.F. Müller) and one species of large size (Simocephalus vetulus O.F. Müller). Laboratory experiments were performed to estimate the average values of principal demographic parameters of these species and their coefficients of variability at two temperatures, 18 and 27°C. Population dynamics of the two species in mono- and mixed cultures was simulated with and without accounting for individual variability using available published data and our own data on demographic parameters. Individual variability was shown to help populations survive unfavorable trophic conditions and to give competitive advantage over populations in which all individuals of the same age are identical. Individual variability decreased with rising temperatures due to probable acceleration of physiological processes. © 2013 Pleiades Publishing, Ltd.

Feniova I.Y.,RAS Severtsov Institute of Ecology | Zilitinkevich N.S.,Zubov State Oceanographic Institute
Russian Journal of Ecology | Year: 2012

Laboratory experiments and computer simulations have been performed to study the influence of increased temperatures on the structure of cladoceran communities. Analysis of changes in the rate of population growth and demographic parameters has shown that smaller cladoceran species are less sensitive to decreased concentrations of food at any of the test temperatures (18, 21, and 27°C). An increase in temperature from 18°C to 27°C has been shown to facilitate the establishment of acute competition conditions. At 18°C, periods of food deficiency are shorter, and competition is therefore less manifested than at 27°C. According to the results of computer simulations, alleviation of competition in waters with "low" temperatures results from reduction of the periods of food deficiency because of prolonged juvenile development. © 2012 Pleiades Publishing, Ltd.

Savenko A.V.,Moscow State University | Demidenko N.A.,Zubov State Oceanographic Institute | Pokrovskii O.S.,Tomsk State University
Geochemistry International | Year: 2016

Natural observations were analyzed to study the distribution of dissolved species of major and trace elements in the Onega and Mezen’ mouth areas and the tendencies in the chemical transformations of the is continental runoff in the river mouths of the White Sea drainage system. It is shown that the migration of major ions and dissolved species of Li, Rb, Cs, Sr, B, F and Mo is consistent with a conservative behavior and is controlled by hydrodynamic processes. The amounts of uranium and barium additionally supplying in the Mezen’ mouth exceed those removed with a continental runoff, whereas the Onega, Severnaya Dvina, and other rivers of the White Sea drainage system are characterized by the conservative behavior of uranium, while barium desorption from particulate matter reaches no more than 33% of its content in the riverine waters. The growth of concentrations of these elements in the Mezen’ mouth is caused by the long-term interaction of solid matters of the continental runoff with saline waters in the tide-affected estuary. 28–59, 12–63, 25–67 and 20–63% of concentrations of iron, aluminum, lanthanum, and cerium are removed from the riverine waters in the mouth areas of all studied rivers of the White Sea drainage system mainly owing to the coagulation and flocculation of organic and organomineral colloids. The distribution of dissolved species of mineral phosphorus and silicon in the Mezen’ mouth is presumably controlled by the remineralization of the organic matter in the bottom sediments, which due to the hydrological features of estuary are regularly stirred up and interact with vertically mixing water sequence. Up to 20–46% of dissolved phosphates and 3–22% of silicon are removed from the continental runoff during vegetation period in the mouths of the Onega, Severnaya Dvina, and other rivers of the White Sea drainage system mainly owing to their biological consumption. © 2016, Pleiades Publishing, Ltd.

Diansky N.A.,Russian Academy of Sciences | Fomin V.V.,Moscow Institute of Physics and Technology | Zhokhova N.V.,Zubov State Oceanographic Institute | Korshenko A.N.,Zubov State Oceanographic Institute
Izvestiya - Atmospheric and Ocean Physics | Year: 2013

We suggested a method for modelling the transport of pollutants over the Black Sea water basin adjacent to Big Sochi. The model is based on the application of the Institute of Numerical Mathematics Ocean Model (INMOM) over the entire basin of Big Sochi in two versions: M1 and M2. In the first version, we use uniform spatial resolution of the model with a step of ~4 km; in the M2 version, the resolution is not uniform. The step decreases to 50 m in the basin of Big Sochi. The M2 version is used only in the periods when pollution transport is simulated, for which the initial hydrothermodynamic state is specified from the M1 version. Both versions reflect a complex character of Black Sea circulation; however, the M2 version more adequately reproduces the eddy circulation in its eastern part, where the horizontal resolution of the M2 version is higher. A conclusion is made on this basis that, in order to reproduce the eddy structure of the Black Sea circulation, the resolution of the model should be on the order of 1.5 km and the main factor of the formation of the quasi-stationary Batumi anticyclonic eddy is the topographic peculiarities in this part of the sea. The pollution spreading from the Sochi, Khosta, and Mzymta rivers and from 18 pipes of deep-water sewage was simulated for the flood periods from April 1, 2007, to April 30, 2007. It was shown that mesoscale eddy formations that form a complex three-dimensional structure of pollution spreading make the greatest contribution to the spread of pollution. © 2013 Pleiades Publishing, Ltd.

Morozov E.G.,RAS Shirshov Institute of Oceanology | Marchenko A.V.,University Center in Svalbard | Marchenko A.V.,Zubov State Oceanographic Institute | Fomin Y.V.,Moscow Institute of Physics and Technology
Izvestiya - Atmospheric and Ocean Physics | Year: 2015

Measurements of temperature and salinity were performed in the immediate vicinity of Paula Glacier in the Rinders Fjord (Spitsbergen) in March 2013. At a distance of 15 m from the glacier, we found water with significantly smaller salinity than the surrounding waters. The water temperature appeared 0.35°C lower than the freezing temperature. This phenomenon is related to the fact that fresh water flows from the glacier to the sea. The freshwater flowing from the glacier appears in the seawater environment with lower temperature and higher salinity and becomes supercooled while ascending to the surface © 2015, Pleiades Publishing, Ltd.

Ostroumova L.P.,Zubov State Oceanographic Institute | Polonskii V.F.,Zubov State Oceanographic Institute
Russian Meteorology and Hydrology | Year: 2015

Considered is the water balance model of the estuarine seaside of the Volga and Ural rivers and the North Caspian Sea as well as of its separate parts. The following computational spatial elements, three parts of the North Caspian Sea, are singled out: the shallow zone of the Volga River estuarine seaside, the deep zone in the western part of the North Caspian Sea, and the eastern part of the North Caspian Sea. The input parameters in this model are evaporation from the water surface computed using the ISPAR technique and precipitation depth corrected using the technique of the correction of the measured amount of precipitation worked out by the Main Geophysical Observatory and Kazakh Research Hydrometeorological Institute. The computations are based on the data of observations at four weather stations: Zelenga (Russia), Peshnoi Island, Kulaly Island, and Fort Shevchenko (Kazakhstan). The water inflow to the Volga River delta top corrected by the value of natural evaporation loss in the delta is used as the water inflow to the North Caspian Sea. The water inflow from the Ural River delta to the North Caspian Sea is estimated from the data of Makhambet hydrological station. Using the water balance model, the water balance components can be computed for the separate parts of the North Caspian Sea and the water balance equation can be solved regarding the water balance outflow from these parts. The volume of the water outflow from the North Caspian Sea to the Middle Caspian Sea is determined as a result of water exchange between them. The variations of basic components of the North Caspian Sea following different typical scenarios (typical years determined from the Volga River runoff) are computed using its water balance model. Analyzed are the spatiotemporal regularities of water redistribution in the North Caspian Sea with account of the river runoff volume, evaporation loss, and amount of precipitation at different background levels of the Caspian Sea. © 2015, Allerton Press, Inc.

Filippov Y.G.,Zubov State Oceanographic Institute
Russian Meteorology and Hydrology | Year: 2015

Considered are the issues of the impact of the Don River runoff on the water level in the eastern part of the Taganrog Bay as well as the issues of the determination of the real depth in this part of the sea. Investigated are the cases of the wind absence and wind of western and eastern directions. Presented is the forecast of the sea level in the eastern part of the Taganrog Bay. © 2015, Allerton Press, Inc.

Filippov Y.G.,Zubov State Oceanographic Institute
Russian Meteorology and Hydrology | Year: 2012

Natural fluctuations of the Sea of Azov level are determined by means of hydrodynamic modeling based on the equations of long waves in a homogeneous incompressible liquid in the Coriolis force field. The results of computations demonstrated the presence of the series of level fluctuations against a background of the amphidromic system rotating anticlockwise around the central part of the sea. © 2012 Allerton Press, Inc.

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