Improving Global Wave Spectrum Representation Through SWH Assimilation and Spectral Reconstruction in WaveWatch III

This study applies the Ensemble Optimal Interpolation (EnOI) method to assimilate significant wave height (SWH) data into the WaveWatch III global ocean wave model and evaluates the impact of wave spectrum reconstruction techniques on model performance. The results demonstrate significant reductions in root mean square errors (RMSE) for significant wave height predictions, particularly in most oceanic regions except for the equatorial zones. The assimilated fields enhanced the spectral representation of the WaveWatch III model, substantially improving the accuracy of global wave simulations. This study emphasizes the potential of EnOI-based SWH data assimilation and spectral reconstruction techniques in advancing ocean wave modeling and provides valuable insights for future ocean prediction and operational applications