The Influence of the Inner Asymmetrical Cumulus Convection in Tropcial Cyclones on their Motion
热带气旋内部非对称积云对流对其移动的影响

The dynamic velocity of the tropical cyclone motion is derived from a two level plank-asymmetry CISK mode considering the effect of the inner asymmetrical cumulus convection. In this paper, using the relatively dense data from SPECTRUM-90,we attempt to analyze the influence of the inner structural characteristic of tropical cyclones on their motion and thus to reveal the mechanism of the deviation between the steering now and cyclone motion. The result shows that inclusion of the effect of the asymmetry of the inner cumulus convection will substantially improve the forecasting accuracy of tropical cyclone motion, especially for the unusual motion. Therefore, CISK theory not only is the important mechanism for the formation and development of tropical cyclones but also obviously affects their motion.