摘要
利用2011年呼伦贝尔市9部ADTD型地闪定位仪提供的地闪观测资料,对呼伦贝尔市地闪发生时空分布特征进行分析。结果表明:云地闪中负闪约占92.62%;夏季地闪活动最强,春、秋两季次之,冬季最弱,地闪主要集中在7—8月;地闪的发展有明显的日变化,呈双峰双谷形式,地闪活动下午最活跃;闪电密度的空间分布与地形和下垫面的性质关系密切,地闪的大值中心位于南北走向的大兴安岭山脉东西两侧,白天地闪密度大值中心位于大兴安岭山脉与松嫩平原过渡区山坡上,而夜间地闪密度大值中心则位于呼伦贝尔高原与大兴安岭山脉的过渡区沙丘地带。
Using the lightning observational data provided by 9 ADTD type ground flash position indicators of Hulun Buir City in 2011, the temporal and spatial distribution characteristics of ground flash was analyzed in Hulun Buir City. The results showed that： the percentage of negative ground flashes in cloud-to-ground lightning was 92.62%. Ground flash activities were strongest in summer, second in spring and autumn, weakest in winter, and those were mainly concentrated in July and August. The development of ground flash has obvious diurnal variation, with two wave crest and valley forms, and the most active time of ground flash was in afternoon. The spatial distribution of lightning density was closely related with topography and underlying surface properties, and the ground flash large value center located in the east and west sides of north-south Great Khingan mountains chain. The large value center of ground flash density in daytime was located on the hillside between the Great Khingan mountain chain and Songnen plain, while the large value center in the night was located in the dune field between Hulun Buir highland and Great Khingan mountain chain.
出处
《内蒙古气象》
2013年第6期17-19,36,共4页
Meteorology Journal of Inner Mongolia
关键词
呼伦贝尔市
地形
闪电密度
时空分布
Hulun Buir
terrain
lightning density
spatial distribution
