【摘要】 通过对1980—1991年出现的46次云南全省性大范围暴雨过程的主要影响系统进行分型,找出云南暴雨的主要影响系统,利用美国国家环境预测中心NCEP再分析资料,对暴雨出现次数最多的11次冷锋切变型全省性大范围暴雨过程进行合成分析,揭示了在冷锋切变环流形势下云南大范围暴雨发生前后对流层高低空急流或强风速带的演变特征及其与大范围暴雨发生之间的关系,找出了它们的共同特征,并提取造成云南暴雨的强信号,以期对今后的暴雨预报提供依据。更多还原

【Abstract】 Through classification of 46 times heavy rain occurred in Yunnan province during the period of 1980₁990, it is found that the main impact systems of Yunnan rainstorm were resulted using the reanalysis data of NCEP/NCAR from 1989₁991, we discussed 11 times province wide cold front-shear line type rainstorm cases which most occurred in Yunnan by means of composite analysis. The results indicated the development characteristics of the atmosphere circulation, upper and lower jet or high wind line in troposphere before and after large-scale rainstorm occurred in Yunnan with cold front-shear line type circulation, the relationship between the development characteristics and the large-scale rainstorm, their commonness were found out in this work, we summarized the strong signal resulted in rainstorm in Yunnan for heavy rain storm forecast.更多还原