Assimilation of altimeter wave height data into a spectral wave model using statistical interpolation

Abstract

A scheme for the assimilation of altimeter wave height data into a second generation wave prediction model is developed. The scheme modifies the model wave spectrum so as to be consistent with the satellite observed values of significant wave height. This modification is achieved, however, so that the adjusted wave field is consistent with the model physics and the forcing wind field. In this manner the modifications to the wave field persist in the model, thus yielding long term improvements in model performance. In addition, a statistical interpolation scheme is used to ensure that maximum use is made of the point observations made by the satellite. In this manner, not only points directly..