Numerical investigation of spectral evolution of wind waves. Part II: Dissipation term and evolution tests

Abstract

Numerical simulations of the wind-wave spectrum evolution are conducted by means of new observationbased wind-input and wave dissipation functions obtained in the Lake George field experiment. This experiment allowed simultaneous measurements of the source functions in a broad range of conditions, including extreme wind-wave circumstances. Results of the experiment revealed new physical mechanisms in the processes of spectral input/dissipation of wave energy, which are presently not accounted for in wave forecast models. These features had been parameterized as source terms in a form suitable for spectral wave models; in the present study, they were tested, calibrated, and validated on the b..