Hydromagnetic Resonance in Ionospheric Waves
Published Online: 17 MAR 2013
Copyright © 1974 by the American Geophysical Union.
The Upper Atmosphere in Motion
How to Cite
Hines, C. O. (1974) Hydromagnetic Resonance in Ionospheric Waves, in The Upper Atmosphere in Motion, American Geophysical Union, Washington, D. C.. doi: 10.1029/GM018p0209
- Published Online: 17 MAR 2013
- Published Print: 1 JAN 1974
Print ISBN: 9780875900186
Online ISBN: 9781118663578
- Atmosphere, Upper—Addresses, essays, lectures;
- Dynamic meteorology—Addresses, essays, lectures
The characteristics of one class of travelling ionospheric disturbance may be partially explained as the result of an observational selection, in which an atmospheric wave provides the basic disturbance and a hydromagnetic resonance the selection. This resonance occurs when natural modes of electromagnetic oscillation are generated through hydromagnetic coupling with the atmosphere, and it results in an enhanced motion of the ionospheric electrons which are alone observable. The quantitative comparison with observation provides estimates for the specific heat ratio (γ ∼ 1.1) and scale height (C 2/γg ∼ 20 km), which are lower than the values expected for the F 2-region concerned, but which are nevertheless, possible and certainly valid in order of magnitude.