【摘要】 根据1966-2005年山东省的雷暴资料,运用数理统计及自然正交函数展开(EOF)方法,对山东省雷暴气候特征进行了诊断分析。结果表明:山东省年雷暴日数的空间分布呈现出泰沂山区多、半岛沿海和山东西部平原较少的特点;雷暴主要发生在夏季,有明显的日变化;在过去40a中,山东雷暴日数具有较强的年际、年代际变化,呈明显的波动下降的特点,并有一定的阶段性。更多还原

【Abstract】 By using the data of thunderstorm of Shandong Province from 1966 to 2005 and applying EOF method and other mathematical statistical methods, the characteristics of spatial-temporal variations of thunderstorms were studied. The mainresults areasfollows: the distributionof annual mean of thunderstormdays shows that thunderstorms in the mountainous areas of Mt. Taishan and Mts. Yimeng are more than ones in the western plain area of Shandong Province and coastal region of Shandong peninsula. Thunderstorms mainly occur in summer with obvious diurnal variation. Analyses indicate that the general trend of Shandong thunderstorms has wavily reduced during the last 40 years .The interannual and decadal variabilities of thunderstorms are obvious in Shandong Province.更多还原