DOI: 10.1002/jgrd.50774
论文题名: Measurement and analysis of ground-level electric fields and wire-base current during the rocket-and-wire lightning triggering process
作者: Ngin T. ; Uman M.A. ; Hill J.D. ; Pilkey J. ; Gamerota W.R. ; Jordan D.M. ; Olsen R.C.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 21698996
出版年: 2013
卷: 118, 期: 17 起始页码: 10041
结束页码: 10055
语种: 英语
英文关键词: atmospheric electricity
; lightning
; rocket-and-wire triggered lightning
Scopus关键词: Atmospheric electricity
; Charge density
; Electric field measurement
; Electric fields
; Lightning
; Rockets
; Charge-yield
; Electric field change
; Electric field intensities
; Measurement and analysis
; Negative charge
; Positive charges
; Triggered lightning
; Wire currents
; Wire
; atmospheric electricity
; electrical method
; lightning
; measurement method
; storm
; Florida [United States]
; United States
英文摘要: We present ground-level electric field intensity and trigger-wire-base current measurements in Florida during 33 successful rocket-and-wire triggered lightning attempts, those which initiated a sustained upward leader, and 20 unsuccessful attempts. The electric field changes during wire ascent were measured at eight stations between 35 m and 208 m from the launch site while the electric fields produced by precursor discharges at the ascending wire tip were measured at 120 m and 220 m. Both relatively steady trigger wire currents in the milliampere-range and fast precursor currents in the ampere to hundred-ampere range were measured at the wire base. A total of 2196 individual precursors were measured in 45 launches with negative charge overhead, with 0 to 225 precursors per launch and each precursor depositing 1 μC to 157 μC of charge at the wire tip. With negative charge overhead, slowly varying currents measured during the wire ascent increased to a maximum value between 3 mA and 10 mA. Positive line charge densities on the trigger wire were inferred from both the wire-base current and the ground-level electric field reduction during wire ascent for 38 launches, ranging from 1 μC m-1 near ground to about 100 μC m-1 at 200 m to 300 m aloft. A comparison of successful launches and unsuccessful launches with negative charge overhead shows that successful launches tend to have larger trigger wire line charge densities and larger precursor charge magnitudes, implying larger electric fields aloft. Three unsuccessful triggering attempts were made with positive charge overhead. Key Points Measured electric fields and currents during rocket-triggered lightning attemptsWire charge densities under storms increase to 100 uC/m at 200 m heightHigher wire charge density and precursor charge yield better chance of trigger ©2013. American Geophysical Union. All Rights Reserved. 资助项目: NNK12EA79P
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/63327
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
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作者单位: Department of Electrical and Computer Engineering, University of Florida, 311 Larsen Hall, P.O. Box 116200, Gainesville, FL 32611, United States; Stinger Ghaffarian Technologies, Kennedy Space Center, FL, United States
Recommended Citation:
Ngin T.,Uman M.A.,Hill J.D.,et al. Measurement and analysis of ground-level electric fields and wire-base current during the rocket-and-wire lightning triggering process[J]. Journal of Geophysical Research Atmospheres,2013-01-01,118(17)