AN EXPERIMENT IN NUMERICAL FORECASTING OF TYPHOON TRACKS WITH NESTED MODELS

In order to improve the prognosis of typhoon movement, the nested mesh schemes for the primitive equation models are presented in this paper. An experiment on prediction for some examples had been made by using these schemes. It is shown from the calculation that the methods for conjunction and adjustment of dependent variables at the juncture of coarse-mesh and fine-mesh are effective and the axial-symmetrical typhoon circulation simulated by the normal distribution is suitable for the prediction of typhoon movement by using numerical models. One of the schemes was tested during the typhoon season in 1980 and resulted in the improvement, to a certain degree, in the forecast of the typhoon tracks.