2010年山东省雨季首场大暴雨过程分析

Analysis on First Heavy Rainstorm of Rainy Season in Shandong Province in 2010

利用常规观测资料、物理量诊断和雷达、卫星云图资料等对2010年6月30日至7月2日山东省出现的强降水过程进行分析。结果表明:2010年雨季首场大暴雨呈现范围大、强度大及区域集中的特点,影响系统为西风槽、低涡切变线。卫星云图显示强的对流云团主要在鲁西南地区发展、维持,没有向北发展,造成大降水区主要在鲁西南。大范围的强回波在鲁西南地区持续时间长,降水效率高是鲁西南地区出现暴雨到大暴雨的重要原因。水汽辐合中心与强降水中心有很好对应关系,有很好的水汽和能量向鲁西南大暴雨区输送,暴雨区尤其在超低空有很好的能量水汽供应机制。这次大暴雨有很好的热力和动力条件。

By using the conventional meteorological data,the physical quantity field data,radar and satellite images data,the process of heavy rainstorm occurred during June 30 to July 2 in Shandong Province was researched.The results showed that ： the first heavy rainstorm in Shandong rainy season of 2010 showed characteristics of large range,intensity and regional concentration, affect the system as a westerly trough,low vortex shear line. Satellite imagery showed strong convective clouds mainly in the Southwest region develop and maintain, no northward development, resulting in a large area of precipitation,mainly in the southwest.A wide range of strong echo in the Southwest region long duration ,high precipitation efficiency is the important reason for the heavy rain to heavy rain in south-west of Shandong province.Water vapor convergence center and the heavy rain center has a good corresponding relation ,have very good moisture and energy transportation to the torrential rain area of Shandong province ,heavy rainstorm area has good energy especially in a low-level moisture supply mechanism.The heavy rainstorm has good thermal and dynamic conditions.