Physics
Scientific paper
Feb 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010jastp..72..143a&link_type=abstract
Journal of Atmospheric and Solar-Terrestrial Physics, Volume 72, Issue 2-3, p. 143-150.
Physics
Cloud Discharges, Electromagnetic Field, Lightning, Electric Field Pulses
Scientific paper
In this study, the first electric field pulse of cloud and cloud-to-ground discharges were analyzed and compared with other pulses of cloud discharges. Thirty eight cloud discharges and 101 cloud-to-ground discharges have been studied in this analysis. Pulses in cloud discharges were classified as [`]small', [`]medium' and [`]large', depending upon the value of their relative amplitude with respect to that of the average amplitude of the five largest pulses in the flash. We found that parameters, such as pulse duration, rise time, zero crossing time and full-width at half-maximum (FWHMs) of the first pulse of cloud and cloud-to-ground discharges are similar to small pulses that appear in the later stage of cloud discharges. Hence, we suggest that the mechanism of the first pulse of cloud and cloud-to-ground discharges and the mechanism of pulses at the later stage of cloud discharges could be the same.
Azlinda Ahmad Noor
Baharudin Z. A.
Cooray Vernon
Dwyer Joseph R.
Fernando Mahendra
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