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Simultaneously measured current, luminosity, and electric field pulses in a rocket‐triggered lightning flash
| Content Provider | Semantic Scholar |
|---|---|
| Author | Qie, Xiushu Jiang, Rubin Wang, Caixia Yang, Jing Wang, Junfang Liu, Dongxia |
| Copyright Year | 2011 |
| Abstract | [1] Current, luminosity, and electric field pulses in a rocket‐triggered negative lightning flash have been analyzed based on the channel base current, high‐speed video images, and electric field changes at 30 m from the channel. Among the 31 distinct current pulses, there are 4 return strokes, 18 typical M components, 5 large M components with unusual large peak current in a range of kiloamperes, 3 initial continuing current (ICC) pulses, and 1 stroke–M component (RM) event which exhibits both return stroke and M component features. The geometric mean of peak current is 13.5 kA, half peak width is 28.4 ms, and risetime from 10% to 90% peak is 1.1 ms for the 4 return strokes, while the corresponding values are 243 A, 400 ms, and 319 ms, respectively, for the 18 typical M components and 5.1 kA, 76.3 ms, and 34.6 ms, respectively, for the 5 large M components. The electric field and current waveforms of ICC pulses exhibit features similar to those of the M components, indicating the similarity of their mechanisms. Detectable optical luminosity is found just prior to all the pulse events, even return strokes. The M components are superimposed on a slowly varying continuing current, while the directly measured current prior to the return strokeisnotsignificant.ThesimultaneouselectricfieldandcurrentwaveformofRMimplies a superposition of dart leader and M incident wave in the channel, and the possible reason is that two branches with common lower portions coexist simultaneously in the upper part of the discharge channel. |
| File Format | PDF HTM / HTML |
| DOI | 10.1029/2010JD015331 |
| Volume Number | 116 |
| Alternate Webpage(s) | http://lageo.iap.ac.cn/uploads/120227015732rkavor0xggu1.pdf |
| Alternate Webpage(s) | https://doi.org/10.1029/2010JD015331 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
