On the influence of ionospheres with non-uniform conductivity distribution on hydromagnetic waves
Item
Title (Dublin Core)
en-US
On the influence of ionospheres with non-uniform conductivity distribution on hydromagnetic waves
Description (Dublin Core)
en-US
A theoretical model is proposed which describes the influence of non-uniform ionospheric height-integrated conductivity distributions on VLF-pulsations. The assumption is made that the field-aligned currents carried by the wave-field are closed by polarisation currents in the magnetosphere and by the irrotational part of the height-integrated ionospheric currents. Current continuity at the magnetosphere-ionosphere boundary provides for a differential equation governing the reflected electric field for arbitrary non-uniform conductivity distributions. Model calculations for simple, but realistic conductivity and electric field distributions show that local shifts of the ionospheric field maximum against that of the magnetic field below the ionosphere as well as double-peak distributions of the electric field can occur. Strong electric field anomalies i.e. significant deviations of the electric field distribution as compared with the uniform case occur in conductivity gradient zones and fall off rapidly outside. The previously predicted 90° rotation between the magnetic field below and above the ionosphere does not hold generally because the rotation angle depends strongly on the conductivity gradients.
ARK: https://n2t.net/ark:/88439/y072759
Permalink: https://geophysicsjournal.com/article/157
ARK: https://n2t.net/ark:/88439/y072759
Permalink: https://geophysicsjournal.com/article/157
Creator (Dublin Core)
Glasmeier, K.-H.
Subject (Dublin Core)
en-US
Geomagnetic pulsations
en-US
Magnetosphere-ionosphere coupling
en-US
Ionospheric reflection coefficient
en-US
Ionospheric rotation effect
en-US
Theory
Publisher (Dublin Core)
en-US
Journal of Geophysics
Date (Dublin Core)
1983-12-15
Type (Dublin Core)
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
en-US
Peer-reviewed Article
Format (Dublin Core)
application/pdf
Identifier (Dublin Core)
https://journal.geophysicsjournal.com/JofG/article/view/157
Source (Dublin Core)
en-US
Journal of Geophysics; Vol 54 No 1 (1984): Journal of Geophysics; 125-137
2643-2986
2643-9271
Language (Dublin Core)
eng
Relation (Dublin Core)
https://journal.geophysicsjournal.com/JofG/article/view/157/117