Fig. 6
From: Vertical profile of atmospheric conductivity that matches Schumann resonance observations
Attenuation rates of ELF waves and power spectra of vertical electric field. a Frequency variations of the imaginary part of propagation constant. Line 1 is the reference dependence (1)–(4); lines 2 and 3 characterize losses in the “whole day” and the “whole night” cavities. b Power spectra of the vertical electric field. Line 1 is the reference spectrum obtained with the propagation constant (1)–(4); lines 2 and 3 show spectra for the day and night conductivity profiles