Numerical Forecasting of the Movement of Cyclone

[摘要] From the point of view of the numerical prediction in the barotropic model, the movement of the cyclone is studied.Removing an adequate circular vortex from the weather chart of a cyclone, the interaction between the vortex and the residual field is studied theoretically.Furthermore, the velocity of the movement of the height minimum (the centre of the cyclone) on the constant pressure chart is derived from the height change obtained by analysis, and it is also shown by a real example that this method is objective, that is, the velocity thus obtained is uniquely determined in spite of the various circular vortices eliminated.The purpose of this paper is twofold; one is to make clear the dynamical role of the barotropic model of cyclones and the other is to give a basic aspect to the prediction of the movement of typhoons (next paper).

[学科分类] 大气科学