Return Stroke Currents of Triggered Lightning in Guangdong, China
The current measurements of 17 return strokes (RSs) produced by 6 classical triggered lightning flashes (TLFs) conducted in Guangdong, China from 2008 to 2010 were analyzed for the first time in this study.The geometric mean (GM) value of the peak value current (IPeak) is 16.59 kA, the half-peak width (tHPW) is 21.91 μs, the 10-90％ risetime (t10-90％) is 0.45 μs, the 10-90％ average gradient (G10-90％) is 29.61 kA μs-1, the maximum gradient (GMax) is 55.89 kA μs-1, the charge transfer in 1ms after the beginning of the return strokes (Q1ms) is 1.61 C, and the action integral in 1ms after the beginning of the return strokes (AI1ms) is 6.60×103 A2 s.The RSs in GCOELD are, on average, stronger than those reported by other authors referenced in this study.The peak value current has a general good linear relation with G10-90％ (determination coefficient (R2) =0.64), a good linear relation with GMax (R2=0.74), a strong power function relation with Q1ms (R2=0.89), and an excellent logarithmic function relation with AI1ms (R2=0.92).Additionally, the current of the initial-stage return stroke (ISRS) of an altitude TLF was analyzed and found to have small tHPW (2.12 μs), charge transfer (36.37 mC) and action integral (181.56 A2 s), but was similar to other RSs for all other parameters.After the ISRS, a number of chopped-shape pulses, attributed to the back-and-forth reflections of the ISRS current, were recorded and analyzed for their characteristics.
Dong Zheng Yijun Zhang Weitao Lu Yang Zhang Wansheng Dong Shaodong Chen Jianru Dan
Laboratory of Lightning Physics and Protection Engineering (LiP&P),Chinese Academy of Meteorological Guangdong Meteorological Bureau,Yuexiu District,Guangzhou,China Conghua Meteorological Bureau,Conghua,Guangzhou,China
国际会议
成都
英文
1-4
2011-11-01（万方平台首次上网日期，不代表论文的发表时间）