普宁市近51a后汛期暴雨气候统计及分析

通过对普宁1959～2009年后汛期（7～9月）暴雨日数、暴雨过程及影响系统的统计分析,结果表明：近51 a普宁后汛期年平均暴雨日数为5.3 d、暴雨过程为3.9次,最长连续暴雨5d;普宁后汛期暴雨日数资料序列有较弱的递增趋势,并存在19 a左右的较长周期和6 a左右的局部周期振荡;造成普宁后汛期暴雨主要是热带天气系统,占后汛期暴雨影响系统的83.6%,其中热带气旋影响占62.7%,西风带天气系统仅占16.4%;影响普宁后汛期热带气旋出现暴雨的机率为87.0%,每年副高第二次季节性北跳后,受热带气旋影响的机率增大。造成后汛期日雨量≥150 mm的热带气旋,其登陆地点集中在海丰至电白之间;普宁后汛期暴雨前的单站要素变化主要有3种类型：持续降压型、高温猛降型和低压回升型。

Climate Statistics and Analysis to the Flood Season Heavy Rain in Puning in Recent 50 Years.

the statistic analysis to the heavy rain's days and process and the effect system happened in Jul to Sept.in Puning from 1959 to 2009 showed that the mean heavy rain was 5.3 days,the heavy rain process was about 3.9 times,and the longest process was 5 days,and also showed that the flood season heavy rain days data array weak increased progressively tendency,and possed the 19 annual circulation and 6 annual circulation vibration.The main systems caused the heavy rain in Puning were the tropical ones,include ...