Sprites triggered by negative lightning discharges

Details Sprites triggered by negative lightning discharges Sprites triggered by negative lightning discharges

Dec 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999georl..26.3605b&link_type=abstract

Geophysical Research Letters, Volume 26, Issue 24, p. 3605-3608

Physics

40

Atmospheric Composition And Structure: Middle Atmosphere-Energy Deposition, Meteorology And Atmospheric Dynamics: Atmospheric Electricity, Meteorology And Atmospheric Dynamics: Lightning, Meteorology And Atmospheric Dynamics: Mesospheric Dynamics

Scientific paper

High altitude air breakdown, manifested as ``red sprites,'' is reported in close association with negative cloud-to-ground lightning (-CG) on at least two occasions above an unusual storm on August 29, 1998. Data from high speed photometry, low-light-level video, and receivers of lightning electromagnetic signatures in the frequency range 10 Hz to 20 kHz are used to establish the association and indicate that the causative -CG discharges effected unusually large vertical charge moment changes (ΔMQv) of up to 1550 C.km in 5 ms. The existence of sprites caused by -CG's, rather than the regularly associated +CG's, has immediate implications for sprite models and observations.

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