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Initiation of positive streamer corona in low thundercloud fields
Author(s) -
Cai Qiheng,
Jánský Jaroslav,
Pasko Victor P.
Publication year - 2017
Publication title -
geophysical research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.007
H-Index - 273
eISSN - 1944-8007
pISSN - 0094-8276
DOI - 10.1002/2017gl073107
Subject(s) - thunderstorm , lightning (connector) , electric field , atmospheric electricity , meteorology , range (aeronautics) , corona discharge , atmospheric sciences , mechanics , particle (ecology) , environmental science , corona (planetary geology) , electron avalanche , precipitation , electric discharge in gases , physics , computational physics , materials science , geology , ion , voltage , ionization , thermodynamics , power (physics) , oceanography , composite material , quantum mechanics , astrobiology , venus
Formation of filamentary gas discharge forms, commonly referred to as streamers, is one of the conditions required for initiation and subsequent propagation of lightning leaders. It is quantitatively demonstrated that streamers can be initiated under thunderstorm conditions when two precipitation particles cause an enhancement of the electric field by passing in close vicinity of each other. Conditions for avalanche‐to‐streamer transition are documented using a model of two spherical hydrometeor particles placed in uniform ambient field. The results are presented in scaled form using similarity relations for gas discharges and can be applied for a wide range of thunderstorm conditions, including different air pressures, electric fields, and particle dimensions.