中文摘要：

利用成都地区5个测站1959—2000年的雷暴观测资料，通过数理统计和小波分析，研究了成都地区雷暴的气候特征。结果显示：成都地区年雷暴日数较多，年际变化较大，年雷暴日数有减小的变化趋势，每10a雷暴日数减少近4d；成都地区的雷暴有很强的季节性特点，集中出现在4—9月的5个月中，而夏季6，7，8三个月占7成以上；成都地区雷暴初日普遍在4月中旬，终日普遍在10月中旬，雷暴初／终日年际间差异很大。从小波分析结果看，成都、金堂、双流和蒲江4站近42a年来雷暴日数在1982年以前有12a左右的震荡周期，1982年以后表现为6a左右的周期；都江堰的年雷暴日数分布特征和其他4个测站有较大不同，主要表现为15a的震荡周期。

英文摘要：

By using the observational data of thunderstorm of five stations in Chengdu during 1959 to 2000, the climatic characteristics of the thunderstorms are studied by means of mathematical statistics and the analysis of wavelets. The results show that the mean annual number of thunderstorm days is comparatively large, and interannual thunderstorm variability is great, the annual number of thunderstorm days has a decreasing trend, the numerical value of decreasing days is about 4 per decade. The obvious seasonal variation of thunderstorm can also be detected, and the period of April to September is the most frequent months for thunderstorm, and over 70% thunderstorm occurs in the three-month of June, July and August during the summer. The initial thunderstorm in Chengdu is often occurring around the middle ten days of April , the ending date of thunderstorm in Chengdu is commonly around that of October, and the interannual variation in initial and ending thunderstorm dates is great. The results from wavelets analysis show that the variation period of annual number of thunderstorm days at the four stations of Chengdu, Jintang, Shuangliu and Pujiang in the last 42 years is about 12 years before1982 ,and is about 6 years after 1982; the variation period of thunderstorm climatology in Dujiangyan is 15 years, which is considerably different from the other four stations.