TITLE:
Wave Structures in the Upper Ionospheric Plasma in Spherical Coordinates
AUTHORS:
Khatuna Elbakidze
KEYWORDS:
Ionospheric Plasma, Planetary Waves, Inhomogeneous Geomagnetic Field
JOURNAL NAME:
Journal of Applied Mathematics and Physics,
Vol.8 No.9,
September
22,
2020
ABSTRACT: Physical mechanism of generation of the new modes of ultra-low-frequency (ULF) electromagnetic planetary waves in F-region of the spherical ionosphere due to the latitudinal inhomogeneity of the geomagnetic field is suggested. The frequency spectra, phase velocity, and wavelength of these perturbations are determined. It is established, that these perturbations are self-localized as nonlinear solitary vortex structures in the ionosphere and moving westward or eastward along the parallels with velocities much greater than the phase velocities of the linear waves. The properties of the wave structures under investigation are very similar to those of low-frequency perturbations observed experimentally in the ionosphere at middle latitudes.