Stratospheric Observations of X-rays Near a Thunderstorm

Details Stratospheric Observations of X-rays Near a Thunderstorm Stratospheric Observations of X-rays Near a Thunderstorm

Dec 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003agufmae42a0791m&link_type=abstract

American Geophysical Union, Fall Meeting 2003, abstract #AE42A-0791

Physics

0342 Middle Atmosphere: Energy Deposition, 3324 Lightning

Scientific paper

A balloon, carrying up and down-viewing x-ray spectrometers, was launched from Cachoiera Paulista, Brazil on 6-Dec-2002 to study lightning and sprites from the stratosphere (35 km altitude). Each spectrometer acquired a spectrum every millisecond in the energy range 20 keV--600 keV. Over 190 CG strokes within 50 km horizontal distance of the balloon were identified by a ground-based lightning detection network while the balloon was at ceiling. We report on the general absence of x-ray emissions specifically associated with lightning, and set observational upper limits for the sprite/lightning associated x-ray flux. We also report upon a singular x-ray event, in which the down-going flux increased by a factor of nearly 5 for several seconds, but without nearby lightning.

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