摘要
通过利用1957-2016年阳山县气象观测站雷暴观测资料对阳山县雷暴日数的分布特征和变化规律进行分析,发现1957-2016年间阳山县平均雷暴日数为78.2d,雷暴日数以5.59d/10a的速率减少,减少趋势非常显著,1981年左右出现了明显的突变现象。年内分布总体呈单峰型的特征,全年每个月份都有概率出现雷暴,主要集中在夏季,冬季出现雷暴的几率很小。初雷80%保证率出现在2月上旬,终雷80%的保证率出现在11月上旬。在整个时间序列内,存在着准6年和10年的中长周期的低频振荡;另外近20年准2年的短周期高频周期震荡也比较显著。
The distribution and evolution of thunderstorm days in Yangshan county were analyzed by using the thunderstorm observation data of Yangshan county meteorological bureau from 1957 to 2016. The results showed that: the average number of thunderstorms in Yangshan County from 1957 to 2016 was 78.2 D, and the number of thunderstorms decreased at a rate of 5.59 D/10 a, and the reduction trend was very significant. There was a significant mutation around 1981. There is a probability of thunderstorms every month throughout the year. The distribution during the year is generally single-peak, mainly concentrated in summer, and the chance of thunderstorms in winter is very small. The 80 % guarantee rate of the initial thunder appeared in early February, and the 80 % guarantee rate of the final thunder appeared in early November. In the entire time series, there are lowfrequency oscillations of medium and long periods of 6 and 10 years.In addition, the short-cycle high-frequency cycle oscillations have also been significant in the past 20 years.
作者
朱勇
谢博文
唐繁旭
ZHU Yong;XIE Bowen;TANG Fanxu(Yangshan Meteorological Bureau,Yangshan 513100,China;Lianshan Meteorological Bureau,Lianshan 513200,China)
出处
《清远职业技术学院学报》
2019年第6期33-35,共3页
Journal of Qingyuan Polytechnic
关键词
气候学
雷暴
分布和变化特征
小波分析
突变检验
climatology
thunderstorms
distribution and variation characteristics
wavelet analysis
mutation test
