1999年上海市一次连续性暴雨过程分析

A Persisting Heavy Rain Process in Shanghai in 1999

利用实测资料 ,采用天气学方法和有限区数值预报模式计算的物理参数 ,对1 999年 6月 2 3日 2 0时至 2 8日 1 4时上海市一次连续性暴雨过程进行了分析研究 ,指出连续性暴雨过程是在大尺度环流系统异常稳定条件下 ,多种尺度天气系统相互作用及恰当配置的结果 ;同时还探讨了水汽条件、动力条件及不稳定条件等因子在暴雨维持中的重要作用。

By using of the conventional data and physical parameters provided by the limited area model, according to the principle of meteorology, the causes of the persisting heavy rain process of June 23—28,1999 occurred in Shanghai were analyzed.The results show that the persisting heavy rain occurs in the condition of the large scale circulation systems remaining anomalous stability and the multi scale weather systems interacting and standing in a suitable situation.Meanwhile the vapor, dynamic condition and instability energy which play an important role in the heavy rain persistence were also discussed.