CAJ | 학술논문

在广州野外雷电试验基地，对2008年和2011年夏季人工触发闪电回击之后的14个连续电流过程和43个 M分量的通道底部电流、电场变化和通道亮度进行了同步测量和分析。结果表明：M 分量的电流、快慢电场变化和亮度变化波形均近似对称；触发闪电连续电流过程的持续时间、转移电荷量、电流平均值的几何平均值分别为22 ms，6．0 C 和273 A；M 分量的幅度、转移电荷量、半峰值宽度、上升时间、持续时间的几何平均值分别为409 A，205 mC，520μs，305μs 和1．6 ms；连续电流持续时间与 M 分量的个数、相邻 M 分量之间的时间间隔均存在显著的正相关关系。
재엄주야외뇌전시험기지，대2008년화2011년하계인공촉발섬전회격지후적14개련속전류과정화43개 M분량적통도저부전류、전장변화화통도량도진행료동보측량화분석。결과표명：M 분량적전류、쾌만전장변화화량도변화파형균근사대칭；촉발섬전련속전류과정적지속시간、전이전하량、전류평균치적궤하평균치분별위22 ms，6．0 C 화273 A；M 분량적폭도、전이전하량、반봉치관도、상승시간、지속시간적궤하평균치분별위409 A，205 mC，520μs，305μs 화1．6 ms；련속전류지속시간여 M 분량적개수、상린 M 분량지간적시간간격균존재현저적정상관관계。
The continuing current (CC)process of cloud-to-ground lightning is a discharge process in which charges continuously transfer to ground along the lightning channel after return stroke.The magnitude of CC is small,but the duration of CC is commonly long,so CC often causes lightning disaster.It’s very hard to get current data due to the randomness of lightning.Artificially triggered lightning,in which the time and location of triggered lightning can be controlled,is an effective way to measure current of light-ning.Artificially trigged lightning is different from nature lightning which only has CC after return stroke, yet artificially trigged lightning has CC and initial continuous current (ICC)process both.Only the CC is analyzed using simultaneous observations of current,electric field change and chnnel luminosity by coaxial shunt,fast and slow antenna,and high-speed camera in Guangzhou Field Experiment Site for Lightning Research and Testing,Conghua,Guangdong,China.Then,photoelectric character and characteristic pa-rameters of 14 CC and 43 M-components after return strokes of triggered lightning observed in summer in 2008 and 2011 are analyzed.The relationship between some characteristic parameters of CC and M-compo-nent is analyzed,too. <br> The current waveforms of CC after return strokes are continuous and change slowly.Usually,there are current pulses ranging in size superimposed on CC waveforms.The slow electric field waveforms of CC are slowly changing,too.The lightning channel below the cloud is always luminescent during CC.The current waveforms,fast and slow electric field waveforms and channel luminosity variation waveforms of M-components are approximate symmetrical.The geometric mean of duration,charge transferred to ground,average current and action integral for CC are 22 ms,6.0 C,273 A,4187 A2 s,respectively.The geometric mean of magnitude,charge transferred,half peak width,rise time (10% - 90%),duration, preceding CC level,inter-pulse interval,action integral for M-components are 409 A,205 mC,520 μs, 305 μs,1.6 ms,310 A,6.5 ms,465 A2 s,respectively.There are very remarkable positive correlations between the duration of continuing current and number of M-components,and between the duration of continuing current and inter-pulse interval of M-components.The correlation coefficients are 0.83 and 0.75,and both pass the significant verification of 0.01 level.