Quantitative Relationship Between Current Pulses and Associated Low-Frequency Magnetic Fields During Initial Stage of Rocket-Triggered Lightning

doi:10.1029/2022RS007647

	Quantitative Relationship Between Current Pulses and Associated Low-Frequency Magnetic Fields During Initial Stage of Rocket-Triggered Lightning
	Li, Xiao 5; Lu, Gaopeng 3,4,5; Wang, Ziyi 5; Jiang, Rubin 2; Fan, Yanfeng 1; Zi, Yucheng 5; Liu, Feifan 5; Qamar, Kainat 5; Nambalirwa, Alice 5; Shi, Tao 5
刊名	RADIO SCIENCE
	2023-10-01
卷号	58
关键词	precursory discharge low-frequency magnetic field transmission-line (TL) model channel-base current rocket-triggered lightning
ISSN号	0048-6604
DOI	10.1029/2022RS007647
通讯作者	Lu, Gaopeng(gaopenglu@gmail.com)
英文摘要	The quantitative relationship between the channel-base current and the associated low-frequency magnetic field (B-field) during the early stage of rocket-triggered lightning was examined based on field experiments and numerical simulation. There is a good correlation between the current pulse and the corresponding B-field pulse in terms of amplitude and duration. In specific, the duration of current pulse is approximately proportional to that of the corresponding B-field pulse for precursors and initial upward leaders; as for the pulse amplitude, the linear correlation is more apparent for the initial upward leaders when compared to the precursors, with the ratio of B-field pulse and current pulse between 1.7 and 2.0, which is always greater than that (0.97-1.32) for the precursors. A response function is established to show the quantitative relationship in the time domain between the current pulse and the associated B-field pulse, which is considered as the convolution of the current pulse and the response function. Meanwhile, the current waveform can be obtained if the measured B-field pulse is de-convolved with the response function. The simulation results are in good agreement with the measurement, which proves that our approach is accurate and efficient to quantify the relationship between the current and the B-field pulse of the initial leader discharges. The lightning magnetic field is associated with lightning current flow, and quantifying the relationship between the current and magnetic field is very important for us to calculate the magnetic field distribution of the lightning channel or retrieve the lightning current by using a telemetry magnetic field. Previous studies have also given the statistical relationship between the current peak and the magnetic field peak, but it is not enough to reflect the corresponding relationship in the time-domain waveform changes between them. We set up equipment to measure the current and magnetic field synchronously in the rocket-triggered lightning and study their quantitative relationship using measured data. Therefore, a modified transmission line model suiting the initial leader discharges with reference to the return stroke model is established to show the quantitative correspondence between the magnetic field and the current in the time domain by a response function (sequence). A comparison between the simulation results and the measurements verified the effectiveness of this method. Quantitative relationship between the current pulse and associated B-field pulse for precursors and initial upward positive leader (iUPL) of triggered lightning is examinedThe peak ratio of B-field pulse versus current pulse for during the iUPL stage is larger than that for the precursory pulsesA response function is found to show the quantitative correspondence between the B-field pulse and the current pulse in the time domain
资助项目	This work was supported by the National Key Ramp;D Program of China (2017YFC1501501), Youth Innovation Fund project of the university (WK2080000172), the CAS Project of Stable Support for Youth Team in Basic Research Field (YSRR-018), Natural Science Foun[2017YFC1501501] ; National Key Ramp;D Program of China[WK2080000172] ; Youth Innovation Fund project of the university[YSRR-018] ; CAS Project of Stable Support for Youth Team in Basic Research Field[41875006] ; CAS Project of Stable Support for Youth Team in Basic Research Field[U1938115] ; Natural Science Foundation of China ; Chinese Meridian Project[183311KYSB20200003] ; International Partnership Program of the Chinese Academy of Sciences
WOS关键词	TRANSMISSION-LINE MODEL ; MECHANISM
WOS研究方向	Astronomy & Astrophysics ; Geochemistry & Geophysics ; Meteorology & Atmospheric Sciences ; Remote Sensing ; Telecommunications
语种	英语
出版者	AMER GEOPHYSICAL UNION
WOS记录号	WOS:001074679600001
资助机构	This work was supported by the National Key Ramp;D Program of China (2017YFC1501501), Youth Innovation Fund project of the university (WK2080000172), the CAS Project of Stable Support for Youth Team in Basic Research Field (YSRR-018), Natural Science Foun ; National Key Ramp;D Program of China ; Youth Innovation Fund project of the university ; CAS Project of Stable Support for Youth Team in Basic Research Field ; Natural Science Foundation of China ; Chinese Meridian Project ; International Partnership Program of the Chinese Academy of Sciences
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/132492]
专题	中国科学院合肥物质科学研究院
通讯作者	Lu, Gaopeng
作者单位	1.Chinese Acad Meteorol Sci, State Key Lab Severe Weather, Beijing, Peoples R China 2.Chinese Acad Sci, Inst Atmospher Phys, Key Lab Middle Atmosphere & Global Environm Observ, Beijing, Peoples R China 3.Nanjing Univ Informat Sci & Technol, Collaborat Innovat Ctr Forecast & Evaluat Meteorol, Nanjing, Peoples R China 4.Chinese Acad Sci, Anhui Inst Opt & Fine Mech, Key Lab Atmospher Opt, HFIPS, Hefei, Peoples R China 5.Univ Sci & Technol China, Sch Earth & Space Sci, Hefei, Peoples R China
推荐引用方式 GB/T 7714	Li, Xiao,Lu, Gaopeng,Wang, Ziyi,et al. Quantitative Relationship Between Current Pulses and Associated Low-Frequency Magnetic Fields During Initial Stage of Rocket-Triggered Lightning[J]. RADIO SCIENCE,2023,58.
APA	Li, Xiao.,Lu, Gaopeng.,Wang, Ziyi.,Jiang, Rubin.,Fan, Yanfeng.,...&Zhu, Baoyou.(2023).Quantitative Relationship Between Current Pulses and Associated Low-Frequency Magnetic Fields During Initial Stage of Rocket-Triggered Lightning.RADIO SCIENCE,58.
MLA	Li, Xiao,et al."Quantitative Relationship Between Current Pulses and Associated Low-Frequency Magnetic Fields During Initial Stage of Rocket-Triggered Lightning".RADIO SCIENCE 58(2023).