ARE LIGHTNING FLASHES UNIDIRECTIONAL OR OSCILLATING ELECTRIC DISCHARGES?1
نویسندگان
چکیده
منابع مشابه
Microsecond-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 کاملNO 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 کاملOn the electric field at the tip of dart leaders in lightning flashes
The results obtained in this study show that as the dart leader tip passes a given point on the defunct return stroke channel the electric field increases within a fraction of a microsecond to values larger than the critical electric field necessary for the initiation of cold electron runaway in low-density air comprising the channel. These results are in support of the hypothesis that cold run...
متن کاملFeatures of the Electric Fields Generated by Lightning with Special Attention to Positive Ground Flashes
Johari, D. 2017. Features of the Electric Fields Generated by Lightning with Special Attention to Positive Ground Flashes. Digital Comprehensive Summaries of Uppsala Dissertations from the Faculty of Science and Technology 1588. 49 pp. Uppsala: Acta Universitatis Upsaliensis. ISBN 978-91-513-0128-0. This thesis focuses on the main processes in positive ground flashes and the distant lightning e...
متن کاملLightning Electric and Magnetic Fields
Characteristics of measured electric and magnetic fields generated by various lightning processes are reviewed. Ground flashes of both polarities and cloud flashes are considered. Examples of different types of field waveforms are given.
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ژورنال
عنوان ژورنال: Monthly Weather Review
سال: 1914
ISSN: 0027-0644,1520-0493
DOI: 10.1175/1520-0493(1914)42<499:alfuoo>2.0.co;2