Abstract
In order to increase the forecasting accuracy of typhoon track and intensity, a new typhoon initialization method for mesoscale meteorological models is developed in this study. The new typhoon bogussing scheme is based on the potential vorticity inversion technique with a simple time-dependent axis-symmetric typhoon model, and can ingest a realistic high-resolution three-dimensional typhoon structure into low-resolution first guess fields, consistent with its environmental condition and atmospheric dynamics. Preliminary numerical experiments of Typhoon Bart (1999) using PSU/NCAR MM5 show that the new method is quite accurate compared with a traditional method operationally used, owing to the feature of having less dependence on empirical parameters and approximations.
