气候变化领域集成服务门户(CCPortal): Characteristics of Electric Currents in Upward Lightning Flashes From a Windmill and its Lightning Protection Tower in Japan, 2005

CCPortal

DOI	10.1029/2020JD034346
	Characteristics of Electric Currents in Upward Lightning Flashes From a Windmill and its Lightning Protection Tower in Japan, 2005–2016
	Wang X.; Wang D.; He J.; Takagi N.
发表日期	2021
ISSN	2169897X
卷号	126 期号:8
英文摘要	We examine the lightning current of 81 upward lightning (UL) initiated from a windmill and its lightning protection tower in Japan under winter thunderstorms from 2005 to 2016. Among 81 UL, the negative, positive, and bipolar lightning account for 64%, 12%, and 24%, respectively. After checking the current waveforms during the initial stage (IS) of negative UL, we found that self-initiated negative UL have larger peak value and shorter rise time compared to other-triggered ones, although two types of negative UL show no significant difference in charge transfer and duration. Among 18 self-initiated negative UL, half of them are initiated from the windmill. On the other hand, only two of 27 other-triggered negative UL are from the windmill and both of them have smaller current peak value, shorter duration, and smaller charge transfer. According to whether or not the IS current waveforms exhibit pulsation, we have classified UL into type S (smooth), SP (transition from smooth to pulsation), and P (pulsation). We found that the rate of slow current rise for most type P UL is larger than 0.1 kA/ms, whereas for all type S UL the rate is smaller than 0.01 kA/ms. The type SP UL shows a slow current rise rate ranging from 0.01 to 0.1 kA/ms. We found that the current pulsation of type P UL corresponds to the stepwise propagation of a positive leader. Based on these results, we have discussed the effect of the lightning protection tower and the stepwise propagation of positive leaders. © 2021. American Geophysical Union. All Rights Reserved.
英文关键词	lightning current; lightning protection; stepwise propagation; upward lightning; windmill
语种	英语
来源期刊	Journal of Geophysical Research: Atmospheres
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/185292
作者单位	State Key Laboratory of Advanced Electromagnetic Engineering and Technology, Huazhong University of Science and Technology, Wuhan, China; Department of Electrical, Electronic and Computer Engineering, Gifu University, Gifu, Japan
推荐引用方式 GB/T 7714	Wang X.,Wang D.,He J.,等. Characteristics of Electric Currents in Upward Lightning Flashes From a Windmill and its Lightning Protection Tower in Japan, 2005–2016[J],2021,126(8).
APA	Wang X.,Wang D.,He J.,&Takagi N..(2021).Characteristics of Electric Currents in Upward Lightning Flashes From a Windmill and its Lightning Protection Tower in Japan, 2005–2016.Journal of Geophysical Research: Atmospheres,126(8).
MLA	Wang X.,et al."Characteristics of Electric Currents in Upward Lightning Flashes From a Windmill and its Lightning Protection Tower in Japan, 2005–2016".Journal of Geophysical Research: Atmospheres 126.8(2021).