西北师范大学学报（自然科学版）2018，Vol.54Issue(3)：22-28,7.DOI:10.16783/j.cnki.nwnuz.2018.03.005
正地闪过程放电通道的特征参数
The characteristic parameters of positive cloud-to-ground lightning channel
摘要
Abstract
The high time-resolved spectra of two natural positive cloud-to-ground(CG)lightning which one of them contains multiple return strokes have been taken by a high speed slit-less spectrograph. Combining with the synchronous electric field change waveform,the temperature,electrical conductivity of the return stroke channel,radius of the core current channel and peak value of current were calculated. The correlations between the peak current and the time interval of 5 M components which overlapped on the continuous current following the subsequent return stroke R1 of multiple return strokes positive CG lightning were analyzed.The results show that the average temperatures of the return stroke channels for two positive CG lightning were 28 900 29 800 K,the radius of core current channel were 0.36 1.01 cm,the peak currents of the return strokes were 18.6 38.0 kA,which are all larger than the corresponding typical values of common negative CG lightning.T he peak currents of the M components are positively correlated with the time intervals between them.关键词
温度/放电电流/核心电流通道半径/M分量/正地闪Key words
temperature/discharge current/M component/positive CG lightning分类
天文与地球科学引用本文复制引用
袁萍,苏延玲,樊斌,王雪娟..正地闪过程放电通道的特征参数[J].西北师范大学学报（自然科学版）,2018,54(3):22-28,7.基金项目
国家自然科学基金资助项目(11475139,11365019) （11475139,11365019）
