Analyzing the transmission structures of long continuing current processes from negative ground flashes on the Qinghai-Tibetan Plateau (SCI)

CORC > 寒区旱区环境与工程研究所 > 中科院寒区旱区环境与工程研究所（未分类） > 期刊论文

	Analyzing the transmission structures of long continuing current processes from negative ground flashes on the Qinghai-Tibetan Plateau (SCI)
	Fan X. P. ; Zhang G. S. ; Wang Y. H. ; Li Y. J. ; Zhang T. ; Wu B.
刊名	Journal of Geophysical Research-Atmospheres
	2014
卷号	119 期号:5 页码:2050-2063
英文摘要	This paper presents a new overlap and progressive method using either a one-point charge model or a point dipole model for studying the electric field change data of lightning and tests the suitability of the proposed method by analyzing the slow electric field change of the long continuing current data from two negative ground flashes. The current measurements of the ground flashes are from the Composite Observing Experiment for Lightning project carried out in the Datong region of Qinghai Province, China, in 2009, obtained from field observations synchronized through high-precision GPS clocks at seven observation stations. Analysis shows that the time-averaged current can reach 800 A, and the current intensity relates to the height of the top of the return stroke before the continuing current process. The two current processes studied in this work neutralized a large amount of negative charge, 39.5C and 60.8C, respectively. The neutralized charges from the negative charge layer are typically at 2.5-4.7 km above ground. The intracloud transition of the positive leader is a complex process, and the horizontal propagation of the positive leader plays an important role in current duration as well as horizontally influencing the center of the electrical dipole moment with an obvious change of up to 3.0 km. The proposed analysis method is very useful compared to previous methods in terms of determining infinitesimal changes in long continuing currents. This work's new analysis method will help increase understanding of the fine physical processes of long continuing current processes. Key Points Analyzes field change data from the long continuous current processes Employ an overlap and progressive method using two models Compare the fitting result with radar echo and VHF mapping
收录类别	SCI
公开日期	2015-12-24
内容类型	期刊论文
源URL	[http://ir.casnw.net/handle/362004/25068]
专题	寒区旱区环境与工程研究所_中科院寒区旱区环境与工程研究所（未分类）_期刊论文
推荐引用方式 GB/T 7714	Fan X. P.,Zhang G. S.,Wang Y. H.,et al. Analyzing the transmission structures of long continuing current processes from negative ground flashes on the Qinghai-Tibetan Plateau (SCI)[J]. Journal of Geophysical Research-Atmospheres,2014,119(5):2050-2063.
APA	Fan X. P.,Zhang G. S.,Wang Y. H.,Li Y. J.,Zhang T.,&Wu B..(2014).Analyzing the transmission structures of long continuing current processes from negative ground flashes on the Qinghai-Tibetan Plateau (SCI).Journal of Geophysical Research-Atmospheres,119(5),2050-2063.
MLA	Fan X. P.,et al."Analyzing the transmission structures of long continuing current processes from negative ground flashes on the Qinghai-Tibetan Plateau (SCI)".Journal of Geophysical Research-Atmospheres 119.5(2014):2050-2063.