The measurements of the atmospheric electric field potential gradient are analyzed simultaneously at the two high-mountain stations in the vicinity of Mt. Elbrus: Cheget Peak and Terskol Peak, as well as the Kyzburun mountain station located at the end of the Baksan ravine. A global component in the diurnal variation in the electric field is revealed: the morning minimum (01-04 UT) and the evening maximum (19-21 UT), which conforms to the unitary variation in the ionospheric potential, as well as the daylight maximum (08-12 UT) caused by the action of the local generators in the surface layer. The features of the seasonal variation in the electric field are studied.
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Аджиев et al. (2015) studied this question.
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