Surface Wave Spectrum (Operational)

An operational surface wave spectrum is the routine model forecast of how wave energy is distributed across frequency and direction at a point, the directional spectrum E(f, theta). Third-generation spectral wave models such as WAVEWATCH III and WAM solve the wave action balance with wind input, nonlinear four-wave interaction, and dissipation on global grids, forced by numerical-weather-prediction winds and run by centers including NOAA NCEP and ECMWF. Integrating the spectrum yields significant wave height, peak and mean periods, and partitions into wind sea and swell. Mariners and offshore operators use these fields for routing, motion forecasting, and operability windows.