Three-dimensional finite difference time domain modeling of the diurnal and seasonal variations in Schumann resonance parameters
Article first published online: 21 OCT 2006
Copyright 2006 by the American Geophysical Union.
Volume 41, Issue 2, April 2006
How to Cite
20062007), Three-dimensional finite difference time domain modeling of the diurnal and seasonal variations in Schumann resonance parameters, Radio Sci., 41, RS2S14, doi:10.1029/2005RS003402, 42, 2., and (
- Issue published online: 21 OCT 2006
- Article first published online: 21 OCT 2006
- Manuscript Accepted: 22 MAR 2006
- Manuscript Revised: 27 JAN 2006
- Manuscript Received: 3 OCT 2005
- Schumann resonances;
- Earth-ionosphere cavity;
- diurnal variation
 The diurnal and seasonal variations of Schumann resonances (SR) have been reported in a number of experiments. In this paper, a three-dimensional FDTD model of the Earth-ionosphere cavity with a day-night asymmetric conductivity profile is employed to study the diurnal and seasonal variability of the power and frequency of the first Schumann resonance (SR) mode. Comparison of the FDTD results and recent experimental measurements shows a clear modulation in the SR power related to the local ionospheric height and global lightning activity. It is found that SR frequencies are not only a function of the local time but also are controlled by the global lightning activity changing with universal time.