For current input data, the previous POM result is used. The horizontal coordinate used here is the Mercator, with a horizontal resolution of 0.1°×0.1°, 30 sigma vertical coordinates with a finer resolution in the upper layers are adopted. The time mean ocean surface current data is used, as shown in Fig. 2. Cubic spline data interpolation method was used to generate appropriate wind and current fields to match the spatial and temporal resolution of SWAN.