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Article Dans Une Revue Environmental Research Letters Année : 2013

Electron acceleration above thunderclouds

Thomas Farges
Serge Soula

Résumé

The acceleration of electrons results in observable electromagnetic waves which can be used for remote sensing. Here, we make use of ∼4 Hz–66 MHz radio waves emitted by two consecutive intense positive lightning discharges to investigate their impact on the atmosphere above a thundercloud. It is found that the first positive lightning discharge initiates a sprite where electrons are accelerated during the exponential growth and branching of the sprite streamers. This preconditioned plasma above the thundercloud is subsequently exposed to a second positive lightning discharge associated with a bouncing-wave discharge. This discharge process causes a re-brightening of the existing sprite streamers above the thundercloud and initiates a subsequent relativistic electron beam.
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Dates et versions

insu-01288052 , version 1 (14-03-2016)

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Martin Füllekrug, Ivana Kolmasova, Ondřej Santolík, Thomas Farges, József Bór, et al.. Electron acceleration above thunderclouds. Environmental Research Letters, 2013, 8 (3), pp.035027. ⟨10.1088/1748-9326/8/3/035027⟩. ⟨insu-01288052⟩
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