Electromagnetic Characteristics of Upward Leader Initiated From the Canton Tower: A Comparison With Rocket-Triggered Lightning

doi:10.1029/2021JD034998

	Electromagnetic Characteristics of Upward Leader Initiated From the Canton Tower: A Comparison With Rocket-Triggered Lightning
	Fan, Yanfeng 4; Lyu, Weitao 4; Lu, Gaopeng 1,2,3; Wu, Bin 4; Qi, Qi 4; Zhang, Yang 4; Ma, Ying 4; Lyu, Fanchao 4,6; Chen, Lyuwen 5
刊名	JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
	2021-11-16
卷号	126
关键词	tower-initiated upward lightning rocket-triggered lightning upward positive leader lightning electromagnetic field
ISSN号	2169-897X
DOI	10.1029/2021JD034998
通讯作者	Lyu, Weitao(wtlu@ustc.edu)
英文摘要	By using the synchronous observation data obtained at the Tall-Object Lightning Observatory in Guangzhou (TOLOG) of 2019, the electromagnetic characteristics of upward positive leader (UPL) ascending from the 600-m high Canton Tower are examined, and are compared with the magnetic field (B-field) radiation of UPL in rocket-triggered lightning. Before the inception of sustained UPL, small electric field (E-field) pulses are superposed on the fast E-field changes. The timescale of B-field pulses corresponding to the E-field pulses ranges from 5 to 9 mu s, and the inter-pulse interval is about 30 mu s, which are both similar to the B-field pulses associated with the precursors of rocket-triggered lightning. Measurements show that the precursor-like stage is likely common for upward lightning initiated from the Canton Tower. Moreover, the UPL channel of tower-initiated upward lightning extends significantly in the first several ms with the initial average two-dimensional (2-D) velocity of 8.77 x 10(5) m/s (3-D velocity of 11.0 x 10(5) m/s), which is one order of magnitude faster than the UPL initiated from the wire tip of rocket-triggered lightning, indicating that initiation of UPL from Canton Tower benefits from a substantial E-field enhancement of nearby lightning discharges. However, this favorable condition is rapidly consumed during the UPL development, causing the average 2-D velocity of UPL to decrease rapidly and maintain at about 0.5 x 10(5) m/s. It is noted that the variation in the 2-D speed of sustained UPL differs from tower-initiated upward lightning reported in the literature, which is possibly associated with the physical and geometric properties of the tower.
资助项目	National Key Research and Development Program of China[2017YFC1501504] ; National Natural Science Foundation of China[41905004] ; National Natural Science Foundation of China[41875006] ; National Natural Science Foundation of China[U1938115]
WOS关键词	POSITIVE LEADERS ; CURRENT PULSES ; MULTIPLE
WOS研究方向	Meteorology & Atmospheric Sciences
语种	英语
出版者	AMER GEOPHYSICAL UNION
WOS记录号	WOS:000716774200002
资助机构	National Key Research and Development Program of China ; National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/126528]
专题	中国科学院合肥物质科学研究院
通讯作者	Lyu, Weitao
作者单位	1.Anhui Inst Opt & Fine Mech, Chinese Acad Sci, HFIPS, Key Lab Atmospher Opt, Hefei, Anhui, Peoples R China 2.Nanjing Univ Informat Sci & Technol, Collaborat Innovat Ctr Forecast & Evaluat Meteorl, Nanjing, Jiangsu, Peoples R China 3.Univ Sci & Technol China, Sch Earth & Space Sci, Hefei, Anhui, Peoples R China 4.Chinese Acad Meteorol Sci, State Key Lab Severe Weather, Beijing, Peoples R China 5.Inst Trop & Marine Meteorol, China Meteorol Adm, Guangzhou, Guangdong, Peoples R China 6.Nanjing Joint Inst Atmospher Sci, Nanjing, Jiangsu, Peoples R China
推荐引用方式 GB/T 7714	Fan, Yanfeng,Lyu, Weitao,Lu, Gaopeng,et al. Electromagnetic Characteristics of Upward Leader Initiated From the Canton Tower: A Comparison With Rocket-Triggered Lightning[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2021,126.
APA	Fan, Yanfeng.,Lyu, Weitao.,Lu, Gaopeng.,Wu, Bin.,Qi, Qi.,...&Chen, Lyuwen.(2021).Electromagnetic Characteristics of Upward Leader Initiated From the Canton Tower: A Comparison With Rocket-Triggered Lightning.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,126.
MLA	Fan, Yanfeng,et al."Electromagnetic Characteristics of Upward Leader Initiated From the Canton Tower: A Comparison With Rocket-Triggered Lightning".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 126(2021).