Physics
Scientific paper
Mar 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983ssrv...34..327v&link_type=abstract
(COSPAR, IAU, IUGG, IUPAP, and URSI, International Symposium on Progress in Solar-Terrestrial Physics, 5th, Ottawa, Canada, May
Physics
5
F Region, Ionospheric Currents, Ionospheric Storms, Gaseous Diffusion, Oxygen Atoms, Resistance Heating, Thermosphere, Wind Effects
Scientific paper
Current theories concerning the origin of ionospheric storms at F layer heights are discussed. Because the ion component is a minor constituent below 1000 km, it is necessary to take into account the feedback between the ions and the neutral gas in order to understand the dynamics of the ionospheric plasma during an ionospheric storm. A theory is proposed that is based on the impact of the magnetospheric electric convection field on the dynamo region of the ionosphere-driving electric currents which dissipate and heat the neutral gas of the thermosphere. Global thermal winds are generated by this heat input during storm events. Wind-induced diffusion causes a deviation from diffusive equilibrium of atomic oxygen at F layer heights. This theory is in reasonable agreement with most of the observed data.
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