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Nonlinear mechanism of tsunami wave generation by atmospheric disturbances
1Laboratory of Hydrophysics and Nonlinear Acoustics, Institute of Applied Physics, Russian Academy of Science, Nizhny Novgorod, Russia
2Department of Applied Mathematics, Nizhny Novgorod State Technical University, Nizhny Novgorod, Russia
3Ecole Supérieure de Mécanique, Université de la Méditerranée, Marseilles, France
Abstract. The problem of tsunami wave generation by variable meteo-conditions is discussed. The simplified linear and nonlinear shallow water models are derived, and their analytical solutions for a basin of constant depth are discussed. The shallow-water model describes well the properties of the generated tsunami waves for all regimes, except the resonance case. The nonlinear-dispersive model based on the forced Korteweg-de Vries equation is developed to describe the resonant mechanism of the tsunami wave generation by the atmospheric disturbances moving with near-critical speed (long wave speed). Some analytical solutions of the nonlinear dispersive model are obtained. They illustrate the different regimes of soliton generation and the focusing of frequency modulated wave packets.
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Citation: Pelinovsky, E., Talipova, T., Kurkin, A., and Kharif, C.: Nonlinear mechanism of tsunami wave generation by atmospheric disturbances, Nat. Hazards Earth Syst. Sci., 1, 243-250, 2001. Bibtex EndNote Reference Manager
