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Full-Text Articles in Physical Sciences and Mathematics
Luminosity With Large Amplitude Pulses After The Initial Breakdown Stage In Intracloud Lightning Flashes, Maribeth Stolzenburg, Thomas C. Marshall, Sampath Bandara, Raymond Siedlecki
Luminosity With Large Amplitude Pulses After The Initial Breakdown Stage In Intracloud Lightning Flashes, Maribeth Stolzenburg, Thomas C. Marshall, Sampath Bandara, Raymond Siedlecki
Faculty and Student Publications
Optical data are presented for two intracloud flashes in which there were five events having large amplitude, bipolar electric field change (E-change) pulses and strong VHF emissions. These bright events occurred 18.98–67.33 ms after the initiating event and 10–59 ms after the end of the initial breakdown stage. The three largest events were coincident with WorldWide Lightning Location Network detections of the sort previously associated with terrestrial gamma-ray flashes (TGFs); these pulses had range-normalized E-change amplitudes of 8.73, 8.33, and 3.81 V/m and estimated peak current magnitudes of 262, 250, and 114 kA. The other two events were 3.20 and …
Modeling Initial Breakdown Pulses Of Intracloud Lightning Flashes, Nilmini Karunarathne, Thomas C. Marshall, Sumedhe Karunarathne, Maribeth Stolzenburg
Modeling Initial Breakdown Pulses Of Intracloud Lightning Flashes, Nilmini Karunarathne, Thomas C. Marshall, Sumedhe Karunarathne, Maribeth Stolzenburg
Faculty and Student Publications
In this study 29 initial breakdown pulses (IBPs) from four intracloud (IC) lightning flashes are modeled using data from five or more electric field change (E-change) sites. For each flash the first 5–9 located IBPs are investigated. For each IBP the modeling first extracts the IBP current waveform from the E-change data by matrix inversion and then determines the best channel length and current velocity to match the IBP data. Derived IBP quantities of total charge, charge moment, peak current, peak radiated power, and total energy are calculated. Resulting IBP vertical lengths varied from 27 m to 1300 m; most …