Effect of wind wave parameter fluctuation on the nonlinear spectrum evolution

The influence of the wind wave parameter fluctuation on the nonlinear spect rum evolution is estimated by solving numerically the kinetic equation taki ng into account the nonlinear interaction in the wave spectrum. The nonline ar energy transfer is calculated using an original numerical integrating me thod of the highest accuracy that is described in the paper. The results of numerical simulation shows that wind wave parameter fluctuation produces a significant increase effect of the nonlinear wave spectrum evolution. The present study results in a parameterization, which is made possible taking into account this effect in spectral wind wave models.