The Use of a Stream Function for the Barotropic Forecast of the Typhoon Movement

[摘要]  As an attempt to improve the barotropic forecast of typhoon movement, a stream function is used in this paper in place of the geopotential. The stream function in the typhoon region is obtained by solving the balance equation by the Masuda's method. Using the stream function, the 24 hr and 36 hr forecasts of typhoon movement for 700 mb level and the 48 hr forecast for 500 mb level are performed based on the barotropic model. The machine used for computations is the electronic computer " Fujic." In spite of insufficient boundary condition, the results of the prediction are remarkably improved. From the results we obtained, we find that our method might be useful for the practical forecast.

[学科分类] 大气科学