387175.fig.001a
(a)
387175.fig.001b
(b)
Figure 1: (a) A time frame of the time-varying directional Pierson-Moskowitz sea surface for a wind blowing with a speed of 17 m/s at an angle of between the positive - and -directions. (b) The ensemble averaged spectrum corresponding to the sea surface conditions shown in (a). The peak of the spectrum is indicated.