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Optical characteristics of blue jets produced by runaway air breakdown, simulation results
Author(s) -
Yukhimuk V.,
RousselDupré R. A.,
Symbalisty E. M. D.,
Taranenko Y.
Publication year - 1998
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 - 10.1029/98gl02431
Subject(s) - radius , ionization , altitude (triangle) , physics , intensity (physics) , spectral line , atmosphere (unit) , mechanics , jet (fluid) , range (aeronautics) , front velocity , front (military) , atomic physics , optics , atmospheric sciences , computational physics , environmental science , meteorology , materials science , ion , astronomy , geometry , computer security , mathematics , quantum mechanics , computer science , composite material
The results of numerical calculations of the intensity and spectra of optical emissions from blue jets produced by runaway air breakdown in the atmosphere are presented. It is found that a positive runaway streamer develops in the altitude range 20–34 km following an intracloud discharge that possesses a continuing current of ∼1.7 kA. The ionization front of the runaway streamer propagates upward with a velocity ∼90 km/s and produces optical emissions with a maximum intensity ∼400 kR and a duration ∼53 ms. The comparison between theory and observation yields good agreement for such important blue jet characteristics as maximum intensity of optical emissions, color, front velocity, duration, maximum radius and vertical dimensions and supports the viability of runaway air breakdown as a driving mechanism for this particular type of high altitude discharge.