Abstract
In this paper, the total energy of waves raised in a typhoon was estimated, and it was investigated what percentage of the wind energy dissipated by the surface friction is needed for the formation of waves. Moreover, the author constructed several maps showing the mean distribution of wind waves, swell and wave steepness in a typhoon, and discussed the characteristics of them. Some descriptions were made on the relation between the wind velocity and the wave height or period, and on the relation between the wave steepness and the wave age. Furthermore, on the basis of wave energy spectra at the Port of Onahama obtained by Ijima, the author discussed the distribution of wave energy spectrum in a typhoon progressing on the open sea.
