Abstract:
At present, research on the fair-weather atmospheric electric field are mostly carried out on a single region or on a 2~3 years time scale, while the analysis and comparison on multiple observation stations with different longitude and latitude and large time scale are few. In this study, the observational data of near-surface fair-weather atmospheric electric field from five stations of the Meridian Project in recent ten years were compared and analyzed on three different time scales: annual variation, seasonal variation and diurnal variation. The results show that the peak and valley types of the average daily fair-weather atmospheric electric field are different at different latitudes, and the wave peaks at Zhaoqing Station in Guangzhou, Jiufeng Station in Wuhan and Mohe Station in Heilongjiang tend to shift to the left or the right year by year. Located in the low latitudes in Zhaoqing, Guangzhou, Wuhan, Chengdu PI county stand the Jiufeng station sites, such as nearly a decade of sunny overall atmospheric electric field amplitude shows the characteristics of the change of the reduced year by year, while the electric field amplitude of Changchun Nong'an Station and Heilongjiang Mohe Station in the middle and high latitudes showed an annual increase in the overall trend, and the annual changes were linear. The occurrence time of maximum crest is negatively correlated with geographical longitude, but positively correlated with geographical latitude. There was no obvious latitude effect at each station in the last ten years. The daily average level of the fair-weather atmospheric electric field is higher in winter and lower in summer, and the minimum and maximum values of the daily average fair-weather electric field are approximately normally distributed in all seasons; the variation of the minimum and maximum values is generally consistent on both annual and seasonal time scales. The results reveal the variation characteristics of fair-weather atmospheric electric fields on different time scales.
GAO Zhixu, CHEN Tao, LI Wen, LIU Gang, LI Renkang. Analysis of the Spatial and Temporal Variation Characteristics of the Atmospheric Electric Field on Fair-weather (in Chinese). Chinese Journal of Space Science, 2022, 42(3): 403-413. DOI:10.11728/cjss2022.03.210531066