Effect of the Interaction of Different Scale Vortices on the Structure and Motion of Typhoons

Five numerical experiments have been performed in this paper by using a quasigeostrophic barotropical model to investigate the interaction of different scale vortices on the structure and motion of typhoons. Results show that this interaction may arouse the irregular changes of the asymmetric structure of typhoons, thus leading to anomalous phenomena such as meandering tracks and sudden changes in the motion speed of typhoons; the effect of this interaction on the structure and motion may be quite different when the smaller vortex is situated in different positions of the typhoon circulation.