First Measurements of Low-Medium Frequency Magnetic Radiation for an Altitude-Triggered Lightning Flash

doi:10.1029/2022GL098867

	First Measurements of Low-Medium Frequency Magnetic Radiation for an Altitude-Triggered Lightning Flash
	Fan, Yanfeng 1; Zhang, Yang 1; Lu, Gaopeng 2,3,4; Lyu, Weitao 1; Liu, Hengyi 1; Xu, Liangtao 1; Zheng, Dong 1
刊名	GEOPHYSICAL RESEARCH LETTERS
	2022-09-28
卷号	49
关键词	altitude-triggered lightning upward positive leader downward negative leader bidirectional leader propagation low-medium frequency magnetic field
ISSN号	0094-8276
DOI	10.1029/2022GL098867
通讯作者	Zhang, Yang(zhangyang@cma.gov.cn)
英文摘要	An altitude-triggered lightning flash was conducted on the Field Experiment Base on Lightning Sciences, China Meteorological Administration, in the summer of 2021. The low-medium frequency magnetic field (B-field) of altitude-triggered lightning was measured for the first time with a sensitive magnetic sensor. The B-field waveforms of precursors and sustained upward positive leader (UPL) show the obvious damped-oscillatory waveform, which is caused by propagation losses and reflections of lightning current at both extremities of steel wire. The propagation of UPL during the inception of attempted downward negative leader (DNL) is revealed by B-field signals with microsecond resolution, showing that the bidirectional leaders develop in an uncoordinated manner. The sustained DNL occurs about 5.5 ms after the inception of sustained UPL in our observations, and the measurements indicate that the stepping of DNL was much more frequent than that of UPL during the stage of sustained propagation.
资助项目	National Key Research and Development Program of China[2019YFC1510103] ; National Key Research and Development Program of China[2017YFC1501501] ; National Natural Science Foundation of China[41905004] ; National Natural Science Foundation of China[41775009] ; National Natural Science Foundation of China[41875006] ; National Natural Science Foundation of China[U1938115] ; Basic Research Fund of Chinese Academy of Meteorological Sciences[2021Z011] ; Science and Technology Foundation of Guizhou Province[ZK[2022]245]
WOS关键词	CURRENT PULSES ; INITIAL-STAGE ; FLORIDA ; LEADER
WOS研究方向	Geology
语种	英语
出版者	AMER GEOPHYSICAL UNION
WOS记录号	WOS:000856038800001
资助机构	National Key Research and Development Program of China ; National Natural Science Foundation of China ; Basic Research Fund of Chinese Academy of Meteorological Sciences ; Science and Technology Foundation of Guizhou Province
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/128962]
专题	中国科学院合肥物质科学研究院
通讯作者	Zhang, Yang
作者单位	1.Chinese Acad Meteorol Sci, State Key Lab Severe Weather, Beijing, Peoples R China 2.Univ Sci & Technol China, Sch Earth & Space Sci, Hefei, Peoples R China 3.Nanjing Univ Informat Sci & Technol, Collaborat Innovat Ctr Forecast & Evaluat Meteoro, Nanjing, Peoples R China 4.Chinese Acad Sci, Anhui Inst Opt & Fine Mech, HFIPS, Key Lab Atmospher Opt, Hefei, Peoples R China
推荐引用方式 GB/T 7714	Fan, Yanfeng,Zhang, Yang,Lu, Gaopeng,et al. First Measurements of Low-Medium Frequency Magnetic Radiation for an Altitude-Triggered Lightning Flash[J]. GEOPHYSICAL RESEARCH LETTERS,2022,49.
APA	Fan, Yanfeng.,Zhang, Yang.,Lu, Gaopeng.,Lyu, Weitao.,Liu, Hengyi.,...&Zheng, Dong.(2022).First Measurements of Low-Medium Frequency Magnetic Radiation for an Altitude-Triggered Lightning Flash.GEOPHYSICAL RESEARCH LETTERS,49.
MLA	Fan, Yanfeng,et al."First Measurements of Low-Medium Frequency Magnetic Radiation for an Altitude-Triggered Lightning Flash".GEOPHYSICAL RESEARCH LETTERS 49(2022).