منابع مشابه
NO signatures from lightning flashes
In situ measurements of cloud properties, NO, and other trace gases were made in active thunderstorms by two research aircraft. Concurrent measurements from a three-dimensional (3-D) VHF interferometer and the 2-D National Lightning Detection Network were used to determine lightning frequency and location. The CHILL Doppler radar and the NOAA-WP-3D Orion X band Dopper radar were also used to me...
متن کاملLightning leader altitude progression in terrestrial gamma-ray flashes
Radio emissions continue to provide insight into the production of terrestrial gamma ray flashes (TGFs) by thunderstorms, including the critical question of the conditions under which they are generated. We have identified several TGF-associated lightning radio emissions in which the altitudes of in-cloud lightning leader pulses that precede and follow the TGF can be measured. We combine these ...
متن کاملMicrosecond-scale Electric Field Pulses in Cloud Lightning Flashes
From wideband electric field records acquired using a 12-bit digitizing system with a 500-ns sampling interval, microsecond-scale pulses in different stages of cloud flashes in Florida and New Mexico are analyzed. The pulse occurrence statistics and waveshape characteristics are presented, The larger pulses tend to occur early in the flash and presumably are related to the flashinitiating break...
متن کاملCharacteristics of lightning flashes over the Indian region
Abstract. Satellite (Lightning Imaging Sensor) based lightning flash grid (0.5 x 0.5) data over the land mass areas of the Indian region covering between 8-30N for a period of 4 years (1998-2001) have been analyzed to examine their geographical, annual, interannual and diurnal distribution. An attempt has been made to obtain IC:CG ratio. Result of this study demonstrates that there exists latit...
متن کاملMicrowave radio emissions of negative cloud-to-ground lightning flashes
Article history: Received 6 August 2012 Received in revised form 31 January 2013 Accepted 6 February 2013 We report preliminary results of a new observational study of microwave-frequency electromagnetic radiation that is emitted by lightning discharge processes. Radiation was observed with a ceramic patch antenna and a digital radio receiver tuned to a center frequency of 1.63 GHz and a bandwi...
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ژورنال
عنوان ژورنال: Journal of Geophysical Research: Atmospheres
سال: 1997
ISSN: 0148-0227
DOI: 10.1029/96jd01917