Analysis of Precipitation Characteristics of Different Duration in the Rainy Season of Shaoguan
Based on the hourly precipitation data from eight national stations in Shaoguan in 2008-2021,this paper analyzed the characteristics of precipitation in the city for different duration of the rainy sea-son.The results are shown as follows.The average duration of precipitation was 3.9 h and precipitation e-vents persisting for 2-6 h had larger cumulative amount.With the growth of the duration,cumulative pre-cipitation decreased gradually while precipitation frequency decreased rapidly.Precipitation events lasting for more than 10 h had larger precipitation intensity.Short-term precipitation events mainly started from after-noon to evening,and peak precipitation occurred from 14:00 to 20:00.Persistent precipitation events main-ly started from night to early morning and peak precipitation occurred in early morning.It is less likely for precipitation events,regardless of the duration,to start from 08:00 to 12:00,and the precipitation in this period had smaller amount.For short-term precipitation from afternoon to evening,the peak was formed by the joint action of precipitation frequency and intensity,and the secondary peak in the morning mainly de-pended on the precipitation frequency.The frequency of persistent precipitation did not differ much at each time,and the daily change of precipitation mainly came from the contribution of precipitation intensity.Per-sistent precipitation and short-term precipitation for the annually first rainy season(April-June)accounted for a certain proportion,with persistent precipitation being slightly more.The annually second rainy season(July-September)was mainly of short-term precipitation.
NETL
NSTL
万方数据
