摘要
本文用一维分层模式理论分析了地面降雨、尖端放电、对流运动以及云外电导率变化对雷暴电结构的影响。分析指出,云内对流强度明显地影响着雷暴电结构,强烈的地面降雨和尖端放电可使地面电场强度显著减小,甚至极性翻转。闪电和云顶附近的下沉气流是维持雷暴向上提供充电电流的重要条件。在雷暴中,对流起电机制是一个不可忽略的重要过程。
With a one-dimensional model, we have analysed the impacts of precipitation and point discharge near the ground , convection and conductivity above the top of cloud on electrification process of thunderstorm . Results show that the convection has a great impact on electrification process of thunderstorm .The electric field greatly decreases even converse its polarity owing to precipitation and point discharge near the ground. Convection electrification process is an important electrification mechanism in thunderstorm .
出处
《大气科学》
CSCD
北大核心
1991年第2期120-128,共9页
Chinese Journal of Atmospheric Sciences
关键词
雷雨
对流
起电机制
日地关系
Thunderstorm
Convection electrification
Solar-terrestrial relation- ship .
