The influence of severe frosts in the cold season, accompanied by ice fog creation, on the atmospheric-electric and meteorological quantities in the urban surface atmosphere in Siberia is considered. The assumption that a decrease of electric field potential gradient (∇φ) and an increase of air electrical conductivity (λ±) in the surface atmosphere during severe and prolonged frosts are caused by the changes of the fog particles phase state (liquid to crystalline) and the shape of ice crystals at temperature below –16°C and by the decrease of absolute humidity at temperatures below –35°C was made.
A comparative analysis of seasonal variations in the parameters of the underlying surface under the conditions of the cryolithozone at the SHICRA SB RAS polygon near Yakutsk, far from industrial interference, was performed. Seasonal variations of the parameters of atmospheric electricity and the VLF radio waves propagation from 2009 to 2018 are presented. It was obtained that for the summer season the ground electric field has a recession due to summer defrosting of the upper layer of permafrost and changes in the conductivity of the underlying surface and an increase in permeability for radon output. In the seasonal variation of the VLF radio navigation signals received in Yakutsk in the summer season, there is also a slight decrease due to a forest cover conductivity changing.
The analysis of the data of the coordinated measurements of atmospheric-electrical, meteorological and aerological values recorded during extremely low temperatures is presented. The issues of the relationship between the dehydration of the atmosphere and the evolution of the spectrum of variations of the electric field are considered when the temperature is lowered to extreme values and the fog is formed.
The paper presents the main results of the statistical analysis of variations in the atmospheric electric field during near thunderstorms, as observed in Yakutsk for the period 2009-2016.
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