Three-Dimensional Freak Waves. Once More on New Year Wave ‎

Badulin S.I., Ivonin D.V.

The simplest weakly nonlinear models of three-dimensional water waves   are presented. The spatio-temporal spectral estimates of the New Year Wave   record show a pronounced effect of the harmonic f3/2 = 3/2 fm,   fm – spectral peak frequency) that corresponds to the maximum of five-wave   instability and a harmonic with an intermediate frequency that can be related   to the well-known modulational four-wave instability. The results are   discussed in the context of possible scenarios of freak wave occurrence.

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