大气科学2011，Vol.35Issue(1)：147-156,10.
大兴安岭林区地闪放电特征的观测与分析
Analyses on the Characteristic of Cloud-to-Ground Lightning Flash in Da Hinggan Ling Forest Region
摘要
Abstract
By using multi-station observations on thunderstorm in Da Hinggan Ling forest region which was conducted in the summer of 2009, the characteristics of cloud-to-ground (CG) lightning discharges were analyzed. The results show that 69 ％ of 464 CG lightning flashes were single-stroke CG lightning flashes and the percent of positive CG lightning flashes was up to 22％. Statistics show that 27％ of CG lightning flashes were followed by continuing current and single-stroke CG lightning flashes were usually followed by long continuing current. The mean duration of long continuing current is 127.4 milliseconds. Furthermore, results show that there is corresponding relationship among the duration of continuing current, the inter-stroke interval just preceding the interval containing continuing current, and the electric field change of stroke initiating continuing current: the smaller the inter-stroke interval just preceding the interval containing continuing current and the electric field change of stroke initiating continuing current, the longer the duration of continuing current. In addition, two positive CG lightning flashes have been calculated by using the nonlinear least-square method. The results show that the two positive CG lightning flashes occurred at 7. 6 km and 7. 0 km above mean sea level, respectively. And 38 coulombs quantity of electricity and 36 coulombs quantity of electricity have been neutralized during discharge process for these two flashes, respectively.关键词
大兴安岭林区/雷暴/地闪/连续电流Key words
Da Hinggan Ling forest region/ thunderstorm； CG flash/ continuing current分类
天文与地球科学引用本文复制引用
王东方,刘晓东,宣越健,刘继明,张其林,房广洋,曹冬杰,张伟伟,张廷龙,刘明远..大兴安岭林区地闪放电特征的观测与分析 [J].大气科学,2011,35(1):147-156,10.基金项目
林业公益性行业科研专项经费课题(200704027-1),国家自然科学基金资助项目40930949,中国科学院"百人计划"专项经费 （200704027-1）
