Application of the data filtration algorithm in reconstructing the structure of trapped waves over the Crimean shelf     

S. V. Kochergin  A. E. Yankovsky 《Physical Oceanography》1996,7(5):369-372

The data collected in the course of a local dynamic experiment near the Crimean shore during the summer of 1991 are interpreted, using the filtration algorithm based on variation principles. As a result, the ratio between the mode amplitudes of the long-shore velocity structure has been obtained, which is consistent with the physical views about shelf water dynamics. Translated by Vladimir A. Puchkin.  相似文献   

Multilevel hydrothermodynamic model of a deep basin     

V. P. Kochergin  S. N. Sklyar  R. K. Sultanov 《Physical Oceanography》1995,6(3):167-176

A hydrothermodynamic model based on the traditional system of differential equations is discussed. The model uses conservative finite-difference schemes based on the methods of identifying the barotropic and baroclinic velocity components and on the complete inversion of the dynamic operator. Test computations for the Black Sea basin have been conducted.Translated by Vladimir A. Puchkin.  相似文献   

Seasonal variability and the types of currents in the upper layer of the Black Sea     

V. N. Eremeev  L. M. Ivanov  S. V. Kochergin  O. V. Mel'nichenko 《Physical Oceanography》1992,3(3):193-208

Spectral analysis of the climatic circulation in the upper 10 m layer of the Black Sea has been carried out. The current field was calculated from a three-dimensional baroclinic non-linear model. The mode composition of the circulation was derived. It is shown that the surface climatic circulation can be represented as the superposition of a finite number of elementary currents of two types:n- andm-modes. Only 4n-modes are shown to be energy-dominant throughout the year. A relation is established between the different sources of energy supply of currents and the modes which assimilate this energy. Problems concerning the nature of the classical Black Sea currents such as the main Black Sea current (MBSC) and the Knipovich spectacles are discussed. A scenario of the field large-scale experiment is suggested which allows the reconstruction of the amplitudes of the first 10n- and the first 10m-modes from mooring data.Translated by Mikhail M. Trufanov.  相似文献   

Computational algorithm for the evaluation of inclinations of the level in the problems of the dynamics of basins     

V. P. Kochergin  T. V. Dunets 《Physical Oceanography》2001,11(3):221-232

We develop a method for the evaluation of inclinations of the level, which enables one to find them with high accuracy. The reliability of this method is tested by comparing the numerical solutions for inclinations of the level with analytic expressions. It is shown that the system of coupled equations for inclinations of the level can be decomposed into two independent equations with sufficiently high accuracy. Translated by Peter V. Malyshev and Dmitry V. Malyshev  相似文献   

Identification of the initial field of concentrations of cs137 in the black sea after the chernobyl accident on the basis of the solution of a dual problem     

S. V. Kochergin  V. S. Kochergin 《Physical Oceanography》2012,21(6):401-407

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The identification of parameters of model passive impurity transport in the Black Sea     

V. N. Eremeev  S. V. Kochergin 《Physical Oceanography》1997,8(1):39-46

Using variational algorithss, computations aiming at the reconstruction of the initial passive impurity field have been performed. The likely areas of impurity propagation from various sources in the Black Sea have been identified. The paper discusses different aspects of the application of variational methods of data assimilation in the course of modelling passive impurity propagation. Translated by Vladimir A. Puchkin.  相似文献   

Numerical modelling of the Black Sea hydrodynamics with application to ecological problems     

V. N. Eremeev  S. V. Kochergin 《Physical Oceanography》1993,4(2):95-102

Computations involving a complete baroclinic model for the Black Sea are analysed. Monthly climatic temperature and salinity data were used. Dynamic fields were derived for each of the 12 months. The characteristics of the cold intermediate layer, which represents an essential feature of the Black Sea thermal structure, are examined.Translated by V. Puchkin.  相似文献   

On the calculation of the barotropic components of motion in models for the general circulation of the ocean     

V. P. Kochergin  S. N. Sklyar  R. K. Sultanov 《Physical Oceanography》1995,6(1):19-24

Issues related to the approximation of the stream function and its derivatives are discussed. Model numerical computations are presented, demonstrating the efficiency of the methods under discussion.Translated by Vladimir A. Puchkin. UDK 551.465.110.72; 519.632.4(04).  相似文献   

Identification of the initial oceanographic field by means of the variation algorithm of measurement data assimilation     

Eremeev  V. N.  Kochergin  S. V. 《Physical Oceanography》1994,5(1):65-68

The variation algorithm of data assimilation is considered which is based on the minimization of some quadratic functional of the prediction quality and the solution of a conjugated problem. Numerical experiments of the model have been carried out which demonstrate the potentialities of this approach and the prospects of its employment for solving practical problems.Translated by Mikhail M. Trufanov.  相似文献   

Variational Approach to the Problems of Planning of Experiments and Identification of the Input Parameters of Hydrodynamic Models According to the Data of Measurements     

Eremeev  V. N.  Kochergin  S. V. 《Physical Oceanography》2002,12(1):32-42

We discuss the computational properties of variational algorithms of mastering the data of measurements and convergency of iterative procedures of search for an optimum distribution of the input parameters of a model and consider the model of transfer of a passive admixture. The algorithm of identification is based on the variational principles, solving the conjugate problem, and minimization of the functional of quality of a prediction. We carry out the analytic verification of the efficiency of the algorithm and discuss the problems of optimum planning of experiments from the viewpoint of conditionality of the problem of identification that is being solved.  相似文献