Micrometeorological influences and surface layer radon ion production: Consequences for the atmospheric electric field

Variation of surface electric field with special thrust to atmospheric inversion condition is studied for the tropical station Pune (18°32′N, 73°51′E, 550 m ASL) for the year 1993 considering average meteorological conditions. The study aims to understand the relative effect of space charge density variation modulated by vertical temperature gradient (lapse rate) Vs conductivity variations controlled by radionuclide concentration on modification of electric field close to surface. Electric field is predominantly controlled by lapse rate (space charge density variation) and radon progeny concentration (conductivity modification) in summer and winter respectively. An empirical relation developed elsewhere is evaluated for the present observations.