地面大气电场分析及雷电预警应用

Ground atmospheric electric field analysis and lightning warning application

利用临沧气象站2016年3~8月地面大气电场观测资料,通过逐日地面大气电场绝对平均值和差分地面电场强度分析了该地区地面大气电场特征。经过时序差分后的电场变化曲线很容易看出雷暴过程,无论是峰值还是脉冲变化,而且极性分布也明显。结合多级阈值预警,利用时序差分电场进行预警可以降低空报率。

Based on the observation data of the ground atmospheric electric field in Licang weather station from March to August in 2016,the atmospheric electric field characteristics of the ground are analyzed by the absolute mean of the daily atmospheric electric field and the differential ground electric field.Whether it is peak or pulse,it is easy to see the thunderstorm process after timing difference curves of electric field.And the polarity distribution is obvious.Combined with multi-level threshold warning,the use of timing differential electric field for early warning can reduce the rate of return.