Timedependent model of the initial phase of thundercloud electric field penetration into the ionosphere
Abstract
The initial phase of the penetration of a thundercloud's electric field into the ionosphere is modeled with a timedependent analysis. The geomagnetic field lines are assumed to be vertical, and variables are related mathematically including the electric potential and the Pedersen and fieldaligned conductivities. Boundary conditions are found for the transient and steadystate components of the electric potential, and general solutions are given for the isotropic and anisotropic regions. Two systems of algebraic linear equations are given to solve for the unknown coefficients in the general solution of the homogeneous equation. The analysis shows that at t=0 the thundercloud electric field is affected only by the chargeforming current. At time t=T the analysis shows that the case is quasistationary, and so the charges themselves form the electric field.
 Publication:

Bolgarska Akademiia Nauk Doklady
 Pub Date:
 1992
 Bibcode:
 1992BlDok..45...47T
 Keywords:

 Cloud Physics;
 Electric Fields;
 Electric Potential;
 Ionospheric Disturbances;
 Thunderstorms;
 Atmospheric Electricity;
 Electric Charge;
 Middle Atmosphere;
 Time Dependence;
 Geophysics