Gigantic jets with negative and positive polarity streamers
نویسندگان
چکیده
منابع مشابه
Gigantic jets with negative and positive polarity streamers
[1] The ISUAL gigantic jets (GJs) are categorized into three types from their generating sequence and spectral properties. Generating sequence of the type I GJs resembles that reported previously; after the fully developed jet (FDJ) established the discharge channel, the ISUAL photometers registered a peak that was from a return‐stroke‐like process. The associated ULF (ultra‐low‐frequency) sfer...
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An overview of general phenomenology and proposed physical mechanisms of large scale electrical discharges termed ‘blue jets’ and ‘gigantic jets’ observed at high altitude in the Earth’s atmosphere above thunderstorms is presented. The primary emphasis is placed on summarizing available experimental data on the observed morphological features of upward jet discharges and on the discussion of re...
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[1] In the sprite halo events produced by cloud‐to‐ground lightning discharges, the spatial offsets, long delays, and polarity asymmetry related to the inception of sprite streamers are yet to be explained consistently with observations. In the present work, we use a two‐dimensional model and a high‐resolution one‐dimensional plasma fluid model accounting for electron impact ionization, dissoci...
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Positive and negative streamers are studied in ambient air at 1 bar; they emerge from a needle electrode placed 40 mm above a planar electrode. The amplitudes of the applied voltage pulses range from 5 to 96 kV; most pulses have rise times of 30 ns or shorter. Diameters, velocities and energies of the streamers are measured. Two regimes are identified; a low voltage regime where only positive s...
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A new model of blue jets as a lightning-related phenomenon is proposed. A blue jet consists of the bi-leader, whose top part is seen on photos as a ‘‘trunk of a tree’’, and is capped at the topside of the leader by its streamer zone. The latter is shown as tall and narrow branches of ‘‘the tree’’. It is shown that the time independent fractal blue jet model does not provide an adequate descript...
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ژورنال
عنوان ژورنال: Journal of Geophysical Research: Space Physics
سال: 2010
ISSN: 0148-0227
DOI: 10.1029/2009ja014831