镇江市雷暴气候特征分析

利用1961~2011年镇江市雷暴日监测资料,采用线性拟合、小波分析和M-K突变检验等方法,对雷暴气候特征进行了分析。结果表明,近51年来镇江市年雷暴日数总体上呈现递减趋势;季节变化明显,夏季雷暴日最多、冬季最少;各县市月平均雷暴日均呈单峰型,7月雷暴日数最多;镇江市雷暴日存在6年左右周期的年际变化;镇江市雷暴日突变年为1966年。

Analysis of Thunderstorm Climate Characteristics in Zhenjiang City

According to the daily thunderstorm monitoring data of Zhenjiang City in 1961 -2011, thunderstorm climate characteristics were analyzed by linear fitting, wavelet analysis and M-K test and other methods.Results showed that the annual thunderstorm days presented a de-creasing trend and obvious seasonal changes in recent 51 years.Thunderstorm days were the most in summer and the least in winter.Average monthly thunderstorm days in different cities all showed single peak, and the thunderstorm days were the most in July.Annual thunderstorm days in Zhenjiang City had about 6a long cycle interannual variation.The mutation year of annual thunderstorm days was 1966 in Zhenjiang City.