近50年菏泽地区雷暴日数的气候分布特征  

Climatic Distribution Characteristics of Thunderstorm Days in Heze in Recent 50 Years

作　　者：程萌 

机构地区：[1]巨野县气象局,山东巨野274900

出　　处：《中国农学通报》2016年第25期166-169,共4页Chinese Agricultural Science Bulletin

摘　　要：以观测雷暴日资料为基础,采取线性倾向分析法、Mann-Kendall检验法、Morlet小波分析法,对菏泽地区雷暴日数的气候分布特征进行详细分析。结果发现,1964—2013年间,菏泽各区县雷暴日数分布均匀。从20世纪60年代中期开始,年雷暴日数以2.9 d/10 a的线性趋势显著减少。雷暴日数减少是一种突变现象,开始时间是1981年。在7年层次里,菏泽市雷暴日序列存在准15年周期的振荡,在20年层次里,菏泽市雷暴日序列存在准40年周期的振荡,20世纪80年代后期是一个转折点。雷暴日空间分布均匀。Based on data of thunderstorm days in Heze, linear trend analysis, Mann-Kendall methods and Morlet wavelet analysis, etc. were adopted to analyze the climatic distribution characteristics of thunderstorm days. The results showed that： from 1964 to 2013, the number of thunderstorm days distributed evenly in every county of Heze; from the mid- 1960s, the annual number of thunderstorm days reduced significantly with a linear trend of 2.9 d/10 a; the reducing number of thunderstorm days was a mutation phenomenon, it began in 1981. In 7 years＇ level, the sequence of thunderstorm day in Heze had a 15-year＇ s oscillation; in 20 years＇ level, the sequence of thunderstorm day in Heze had a 40-year＇ s oscillation. Late 1980s was a turning point. The spatial distribution of thunderstorm days was even.

关 键 词：雷暴日 分布 特征 

分 类 号：N34[自然科学总论]