A quasi-static model of global atmospheric electricity. I - The lower atmosphere

Physics

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Atmospheric Electricity, Distribution (Property), Electric Potential, Electrostatics, Lower Atmosphere, Mathematical Models, Current Density, Electrical Resistivity, Graphs (Charts), Orography, Perturbation, Solar Flares, Thunderstorms

Scientific paper

A quasi-steady model of global lower atmospheric electricity is presented. The model considers thunderstorms as dipole electric generators that can be randomly distributed in various regions and that are the only source of atmospheric electricity and includes the effects of orography and electrical coupling along geomagnetic field lines in the ionosphere and magnetosphere. The model is used to calculate the global distribution of electric potential and current for model conductivities and assumed spatial distributions of thunderstorms. Results indicate that large positive electric potentials are generated over thunderstorms and penetrate to ionospheric heights and into the conjugate hemisphere along magnetic field lines. The perturbation of the calculated electric potential and current distributions during solar flares and subsequent Forbush decreases is discussed, and future measurements of atmospheric electrical parameters and modifications of the model which would improve the agreement between calculations and measurements are suggested.

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