Abstract
AbstractThe data of electric field and electric field changes produced by lightning on the ground in Nagqu area of Qinghai‐Xizang plateau in the summer of 2002 were analyzed. The results showed that the charge structure in thunderstorms was varied and complex. Few cloud‐to‐ground (CG) lightning flashes occurred in the thunderstorm. A long time discharge process in cloud occurred just before step leader of positive and negative CG lightning. Most of CG lightning discharges only involved one return stroke. The proportion of positive CG lightning discharges was 33%, which was obviously higher than that in lower and middle latitude area, and negative 67% in thunderstorms. A continuing current process with short lasting time occurred just after the return‐stroke.
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