风场和热源的垂直分布廓线对台风发展影响的数值试验

本文用柱坐标中原始方程的五层对称模式,讨论了风场垂直切变和热源的垂直分布对台风发生发展的作用。用定常热源做的试验表明台风上层的反气旋环流是台风发展的结果。初始风场的垂直切变不利于台风的发展。台风的发展与热源的垂直分布有很大关系。热源的垂直分布廓线若为下大上小的形式,则有利于台风发展。

THE NUMERICAL SIMULATION ON THE INFLUENCE OF VELOCITY PROFILE AND HEATING SOURCE PROFILE ON THE DEVELOPMENT OF TYPHOON

In this paper the influence of velocity profile and heating source profile on the initiation and development of typhoon has been tested by using the 5-layer primitive equation model in cylindrical coordinates. Assuming constant heating source, it is found that in upper layer the anticyclone is the result of the development of typhoon. The perpendicular shear of initial wind field is disadvantageous to the development of typhoon. Development of typhoon is related to perpendicular distribution of the heating source. It is advantageous to the development of typhoon if the heating source in upper layer is stronger than in lower layer.