Assimilation of hydrological observation data for calculating currents in seas and oceans |
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Authors: | V V Knysh G K Korotaev A I Mizyuk A S Sarkisyan |
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Institution: | 1.Marine Hydrophysical Institute,National Academy of Sciences of Ukraine,Sevastopol, Crimea,Ukraine;2.Institute of Numerical Mathematics,Russian Academy of Sciences,Moscow,Russia;3.Hydrometeorological Research Centre of Russia,Moscow,Russia |
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Abstract: | This paper considers the main steps in improving the methods for calculating the ocean (sea) dynamics on the basis of observational
data on sea-water temperature and salinity. The results of diagnostic and adaptation calculations for the near-equatorial
area of the West Atlantic in the area of the Lomonosov countercurrent formation are presented. We consider the problem of
the complex use of measurements of temperature, salinity, and current velocity in the POLYMODE polygons with their assimilation
into the model using a Kalman filter. The results of calculations of the coordinated fields with the mechanism of geostrophic
adaptation and using asynchronous measurements obtained by the Razrezy program are given. We discuss further modifications
of the assimilation algorithms for hydrological observation data in models of sea dynamics and the principles of adaptation
of hydrophysical fields that made it possible to reconstruct the climate fields of the Black Sea and to reproduce the basin
dynamics for 23 years. |
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