SEA WAVE NUMERICAL SIMULATION AND VERIFICATION IN TYRRHENIAN COSTAL AREA WITH X-BAND COSMO-SKYMED SAR DATA

摘要

In this paper, X-band COSMO-SkyMedc Synthetic Aperture Radar (SAR) data have been first used to force wind-wave interaction modeling in a coastal environment. The oceanographic model is based on the Third- Generation SimulatingWaves Nearshore (SWAN) model, which is used for sea wave state estimation in coastal and island regions. The model is typycally forced through the Advanced Research Weather Research and Forecast (WRF-ARW) model data, which give the wind forcing at 1 hour intervals. In this paper, the SWAN model has been forced by using COSMO-SkyMedc SAR-based wind speed estimations, obtained by the azimuth cutoff procedure. After comparison with the ground truth, SAR-derived wind speeds have been used together with ECMWF wind directions to construct a blended wind product, which has been used to force the SWAN model. The validation has been accomplished with respect to significant winter wave storms occurred in the coastal area of Southern Tyrrhenian Sea.