热带风暴热力非对称结构对其运动的影响

Influence of the asymmetric thermodynamic structure on tropical storm motion

研究了热力非对称结构对0421号热带风暴"海马(Haima)"的移动和强度变化的影响。通过物理量场诊断分析发现,热带风暴(气旋)的热力结构在垂直、水平方向均呈非对称分布。热力因子对热带风暴的影响,主要体现在低层。热带风暴朝其移向前方的风暴内部的非绝热增温中心偏折,并有向此方向加速的趋势。了解热带风暴的热力结构分布特征及其对热带风暴移动的影响,对短期预报热带风暴的移动有一定的指示意义。

The thermodynamic asymmetric struction influence on the movement and intensity change of the tropical storm “Haima” of 0421 has been researched. By diagnostical analysis it was found by physical quantity that the thermodynamic structure of tropical storm （cyclone） all assumes asymmetric distribution as vertical and horizontal ones. The thermodynamic factor acted on the influence of tropitical storm chiefly embodies at the low layer. The storm removs to the direction of the center of diabatic heating inside the strom and has the acceleration trend in the direction.