1989年夏季,我们在甘肃永登黑林子地区进行厂用拖带接地金属细丝的火箭引发雷电的试验,获得了3次成功。本文分析了这3次引发雷电的放电特征。结果表明,放电是在雷暴云下部正电荷的作用下上行负流光的激发和传播过程,雷电人工引发时的地面电场为6-8kV/m。由一简单物理模式粗略地定量估算出了放电参数:中和电荷量约为1.2-5.3C,电荷中心离地高度1.3-2.5km,和甘肃地区雷暴云下部正电荷中心高度范围一致。

In the summer of 1989, experiment of artificial lightning triggered with rocket-wire technique was conducted at yongdeng, Gansu and succeeded in three cases. This paper analyses the discharging characteristers of three triggered lightnings. Results show that negative streamer was initiated by rocket-wire and propagated upwards in the effect of lower positive charge of thundercloud. 6-8 kV/m was necessary for the lightning to be triggered successfully. Discharge parameters were estimated approximately by using a simple physical model. Magnitude and altitude of neutralized charge of triggered lightning were 1.2-5.3 C and 1.3-2.5 km respectively, the latter being in agreement with the altitude of lower positive charge of Gansu thunderstorms.