Preliminary results from the Sprites94 aircraft campaign: 2. Blue jets

Details Preliminary results from the Sprites94 aircraft campaign: 2. Blue jets Preliminary results from the Sprites94 aircraft campaign: 2. Blue jets

May 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995georl..22.1209w&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 22, no. 10, p. 1209-1212

Physics

96

Anvil Clouds, Light Emission, Plasma Jets, Spatial Distribution, Thunderstorms, Time, Vertical Motion, Airborne Equipment, Altitude, Brightness Distribution, Color, Energy Distribution, Image Analysis, Propagation Velocity

Scientific paper

Initial observations of a newly documented type of optical emission above thunderstorms are reported. 'Blue jets', or narrowly collimated beams of blue light that appear to propagate upwards from the tops of thunderstorms, were recorded on B/W and color video cameras for the first time during the Sprites94 aircraft campaign, June-July, 1994. The jets appear to propagate upward at speeds of about 100 km/s and reach terminal altitudes of 40-50 m. Fifty six examples were recorded during a 22 minute interval during a storm over Arkansas. We examine some possible mechanisms, but have no satisfactory theory of this phenomenon.

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