Abstract A numerical code, describing the interactions between chemistry and dynamics in the coupled thermosphere and ionosphere system, has been used to investigate the morphology of wind systems of the auroral E-region and, in particular, their response to geomagnetic forcing. The structure and dynamics of both the thermosphere and the ionosphere show very strong interactions at all levels of geomagnetic disturbance. By comparison, other perturbations, particularly those resulting from tidal and gravity wave sources within the lower atmosphere, which are important and easily identified during quiet periods, are always overwhelmed by the magnitude of the effects of large geomagnetic disturbances above about 110 km altitude. The model simulations will be used to characterise the geomagnetic response of the E-region neutral wind, temperature and composition in different parts of the polar cap and the auroral oval, and the major changes resulting from seasonal variations. These wind, temperature and compositional characteristics can also be used to examine induced changes in the ionosphere. Lastly, although there is still only a very modest data base of E-region neutral winds, there are strong indications of many of the predicted phenomena.
Modelling of e-region auroral winds
Advances in Space Research ; 10 , 6 ; 197-213
1989-01-01
17 pages
Article (Journal)
Electronic Resource
English
Modelling of E-region auroral winds
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