Characteristic parameters of positive cloud-to-ground lightning channel
نویسندگان
چکیده
منابع مشابه
Positive and Negative Cloud-to Ground Lightning*
Positive cloud-to ground lightning (+ CGL) occurs in a minor fraction of all thunderstorms [1]. We propose that the microscopic mechanism is the same as in the more common negative CGL, whereas the different polarity is due to the macroscopic cloud dynamics [2]. The origin of collisional charging involves three stages in the basic process [3]. In the first stage kinetic roughening of the surfac...
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The effect of small urban areas on cloud-to-ground (CG) lightning activity is analysed for Spain. The results shown that the CG-flash number is enhanced within and downwind the most of towns considered and that large population and higher SO2 concentration contribute to the increase of the number of CG-flashes. INTRODUCTION AND DATA Several studies have reported that large cities of the USA are...
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We infer peak currents from radiation electric field peaks of 48 positive return strokes acquired at the Lightning Observatory in Gainesville (LOG), Florida, in 2007-2008. In doing so, we use the transmission line model, NLDN-reported distances, and assumed return-stroke speed. From a similar analysis of negative first and subsequent strokes, it appears that the implied return-stroke speed in t...
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7 [1] The origins of positive cloud-to-ground (+CG) 8 lightning in the stratiform region of a leading-line, 9 trailing-stratiform mesoscale convective system (MCS) are 10 investigated. Platforms include radars, NLDN data, and a 11 VHF 3-D lightning mapping system. This study examines a 12 small asymmetric MCS that occurred near the Colorado13 Kansas border in June 2000. In this storm 39 of the ...
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 Earth System Science
سال: 2019
ISSN: 2347-4327,0973-774X
DOI: 10.1007/s12040-019-1196-4