摘要
利用76个站点自记资料进行10分钟雨量及气压分析,揭示出梅雨锋上强降水持续约半小时左右并且集中在狭窄地区。5mm/10min降水主要集中在1个站区域,而少数达3个站区。雨量>10mm/10min的降水出现在1个站区,个别出现在2个站区。>15mm/10min或20mm/10min的降水出现机率极少。并且发现每次暴雨的形成是由几个雨团相继出现所至,而每个雨团又由2—3个或3个以上的强雨核组成。由各站气压10分钟最大振幅变化看其强度大小及出现时间都与降水有较好关系。
Analysis is made of the 10min rainfall and air pressure by using automatic data from 76 stations, indicating that the heavy rain above the meiyu front lasts about half an hour and is concentrated in a narrow area. Rainfall of 5mm/10 min is mainly concentrated in the area of one station and occasionally spreads over three stations. Rainfall of>10 mm/10 min is observed in the area of one station and seldom covers two stations. Rainfall of>15mm/10min or 20 mm/10 min has very little probability for its occurrence. It is found that every heavy rain forms when several rain masses occur one after another and every rain mass is composed of 2—3 or more powerful rain nuclei. From the 10min variation of the greatest amplitude of air pressure at each station, the intensity and time of occurrence are well related with rainfall.
出处
《南京气象学院学报》
CSCD
1993年第2期232-237,共6页
Journal of Nanjing Institute of Meteorology
