2006年7月19—20日苏中地区强降水成因分析  

ANALYSIS ON THE REASON OF A SEVERE RAINFALL OCCURRING IN THE MIDDLE OF JIANGSU PROVINCE FROM JULY 19 TO 20,2006

作　　者：尹东屏[1] 吴海英[1] 张冰[1] 周鹏[1] 刘梅[1] 

机构地区：[1]江苏省气象台,南京210008

出　　处：《气象科学》2007年第6期641-647,共7页Journal of the Meteorological Sciences

基　　金：国家基金委项目(编号:40675056)

摘　　要：对2006年7月19日至20日由冷空气影响造成的不均匀性降水,通过对天气背景、细网格模拟、云图和雷达回波的分析,揭示出:夏季冷空气从中低层影响不会造成大范围的强降水天气,而高层冷空气南下进入辐合带,易产生强的辐合上升气流,从而引发强对流天气。分析表明,在同一对流云团中,不同地点、不同时段的强降水的物理量特征会有所不同。An inhomogeneous precipitation caused by cold air from July 19 to 20 is analyzed using satellite cloud picture, radar echo picture and numerical simulation with fine grid. The results show that largescale severe rainfall can not happen in summer if cold air invades from mid-low layer, however, when upper cold air moves to the southern convergent zone, intense convergent ascending air stream easily forms, thus strong convective weather happens. The results also indicate that the physical characteristics of heavy rain in the same convective cloud are different for different places or periods.

关 键 词：强降水 冷空气 辐合 强对流 

分 类 号：P426.62[天文地球—大气科学及气象学]