热带气旋"黄蜂"动热力特征演变的模拟分析

以"中国登陆台风试验"项目的目标热带气旋"黄蜂"为对象,用高分辨数值模式成功模拟了其近海加强和登陆减弱的过程,从定量和时间演化角度细致分析了热带气旋(TC)各阶段的动、热力特征,包括对流加热特性、温湿结构、稳定度、涡散度、垂直运动、垂直环流、水平环流等基本动、热力因子的时空结构特征,揭示了该热带气旋的大量结构特点,如对流加热的强盛和非对称性、强热带风暴的无眼结构、低层的东暖西冷结构、涡度的准圆形对称结构、东/西侧环流正/斜压性的差异、低层辐合和上升运动的准周期振荡等等.这些结构特征的揭示对深入细致地研究和认识南海热带气旋的特点和演变机理具有重要学术意义.

THE MODELING ANALYSES ON THE KINETIC AND THERMAL FEATURES OF TROPICAL CYCLONE "VONGFONG" (2002)

Taking the target tropical cyclone Vongfong of Chinese Landfalling Typhoon Experiment (CLATEX) as object, detailed analyses are made on the kinetic and thermal features of the cyclone for different developing stages in terms of quantitative and temporal evolution, based on the successful simulation of the TC process (intensity, route and structure) using high resolution modeling system. These include structures of basic kinetic and thermal factors such as convective heating feature, temperature/humidity structure, stability, structures of vorticity, divergence, vertical motion, vertical circulation, horizontal circulation etc. A number of features on the TC structure are revealed, e.g., the existence of intense and asymmetric convective heating, the non-eye structure of severe tropical cyclone, the warm east-side and cold west-side structure in lower atmosphere, the near circinal symmetric vorticity structure for severe TC, the different barotropic/baroclinic features in east/west side circulations, the quasi-periodic oscillation in vertical velocity and lower level convergence. As may be academically valuable in detailed and further study of the features and mechanisms of TCs in South China Sea.