一次中尺度对流系统分析

应用卫星云图、雷达回波、地面加密观测和各种常规资料，分析了１９９６年７月１日在黄海北部￣山东半岛发生的一次中尺度强对流天气过程。高空冷温度槽和低空、地面增温产生的不稳定能量是强对流体系形成的系统；中尺度辐合线、中气旋、近地层加热不均匀性、海陆风的辐合抬升等促进了强对流天气发生；对流云团的并合加强，产生异乎异常的能量，是该系统加强和发怅的重要条件；云团呈准静止状态是产生暴雨和长时间降雹的主要原因「。

A Mesoscale Convective System on the First Day of July in 1996

The satellite cloud picture, radar echo, the intensive observation and the conventional data were used to analyse a strong mesoscale convective weather process which happened between the northern Yellow Sea and Shandong Peninsula on the first day of July in 1996. The results show that the unstable energy, which was caused by the low temperature trough in the upper air and the ascending of temperature in low level and on the ground, is the formation condition of the strong convective system. Those factors, such as mesoscale convergence zone, meso cyclone, uneven heating near the surface and the convergence of land and sea breeze, prompt the development of the convective system. An important condition of the system developing is that the extraordinary energy is produced when the convective cloud clusters merge and enhance. The quasistatic state of the cloud cluster is the main reason for the rainstorm and the continued hailfall.