大兴安岭雷暴日数的时空分布特征

利用大兴安岭地区1980--2008年的雷暴观测资料，对大兴安岭地区雷暴天气的时空分布特征及初、终雷目的变化特征等进行了分析，结果表明：大兴安岭地区年雷暴日数的分布与测站地理位置及纬度有关，近年来年平均雷暴日数以加格达奇为最多，呼玛为最少；年平均雷暴日数的多少与雷暴期的长短无关。大兴安岭地区的雷暴表现出明显的季节性特征，即雷暴多生在夏季，春秋季次之，冬季没有雷暴产生，7月份为雷暴出现的高峰月。雷暴的初、终日出现日期与候平均气温有关。

Temproal and spatial distribution of thunderstorm days in Daxinganling

The climatic variation of the first and the last thunderstorm days as well as temproal and spatial distribution of thunderstorm are analyzed by using observations in Daxinganling from 1980 to 2008.The results show that the distribution of annual thunderstorm days in Daxinganling is connected with geographic location and latitude.In recent years,the maxinmum of thunderstorm days is in Jiagedaqi,while the minmum one is in Huma.The quantity of annual average thunderstorm days has no relationship with longevity...