Impact of the Atmospheric Front Parameters on the Free and Forced Oscillations of the Level and Flow in the Sea of Azov
V. A. Ivanov, T. Ya. Shul'ga
Marine Hydrophysical Institute, Russian Academy of Sciences, Sevastopol, 299011, Russia
Keywords: Азовское море, трехмерная гидродинамическая модель, свободные колебания жидкости, сейши, стационарные течения, штормовые сгоны и нагоны, узловые линии, атмосферный фронт, скорость свободной длинной волны, Sea of Azov, sigma-coordinate model, free oscillations of liquid, seiches, stationary currents, storm surges, nodal lines, atmospheric front, free long wave velocity
Abstract
Level oscillations and flow in the basin of the Sea of Azov have been studied by hydrodynamic modeling using the POM Princeton Ocean Model). The hypothesis on the role of the resonance mechanism in the occurrence of extremely large amplitudes of storm surge and seiche oscillations depending on the velocity and time of motion of atmospheric fronts of the Sea of Azov has been tested. It is found that at the same wind, baric disturbances moving over the Sea of Azov induce forced oscillations, and after the disturbances cease, free oscillations with amplitudes that are 14% higher than those obtained at constant atmospheric pressure. It is shown that the movement of the atmospheric front (whose speed and time are selected under the assumption that waves with maximum amplitudes are generated) plays an important, but not decisive role in the development of the flow structure and level oscillations in the Sea of Azov.
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