Abstract:
Based on the observation data of atmospheric electric field instrument and surface meteorological elements at Anshun Station, Guizhou Province in 2020, the temporal evolution characteristics of atmospheric electric field in this region are analyzed, the relationship between atmospheric electric field and meteorological elements in the same period under sunny, snow and strong thunderstorms and other wither types is discussed. The results show that the diurnal variation of atmospheric electric field at Anshun station is positive all year round. The diurnal variations of summer half year, winter half year and annual average are basically the same. The diurnal variation is lower from afternoon to evening, and its value of summer half year is obviously weaker than that in winter half year and the annual average. The monthly variation shows a decresing trend, with a significant jump from June to July. On sunny days, the average intensity of atmospheric electric field is between 0.15 and 1.01 Kv/m, peaking at 08 o 'clock and valleying at about 17 o 'clock. It is a typical single peak and single valley continental simple type, which is negatively correlated with air temperature and positively correlated with relative humidity. In snowfall weather, the average intensity of atmospheric electric field fluctuates slightly at about 3 Kv/m, reaching a peak value in the early morning and the lowest value at about 14:00, which is basically negatively correlated with air temperature and positively correlated with relative humidity. In strong lightning weather, the atmospheric electric field gradually increases in the afternoon and reaches its peak in the evening, showing a negative correlation with surface pressure and relative humidity. Relative humidity is generally more relevant to atmospheric electric field than surface air pressure and temperature.