Abstract The major solar and geomagnetic energy and momentum inputs which drive the thermosphere have been incorporated in theoretical and numerical three-dimensional and time-dependent models of the thermosphere. Data from recent satellites and from ground-based facilities have been used to test these numerical simulations. The geomagnetic response of the thermosphere is complex, and for numerical modelling, the discrete geophysical mechanisms must be interpreted correctly. Models of the high latitude ionosphere which include the effects of both particle precipitation and rapid ion convection are essential for simulating the thermospheric response to geomagnetic disturbances. The simulated structure and dynamics of the upper thermosphere under conditions of relatively quiet, and rather disturbed, geomagnetic conditions at both the June and the December solstices will be described in this paper. Although it is now possible to simulate the thermospheric behaviour when the solar and geomagnetic inputs are known, a-priori prediction remains difficult, due mainly to the uncertainty of predicting the conditions within the solar wind and the IMF, and the consequent response of the magnetosphere.
Theoretical thermosphere models
Advances in Space Research ; 5 , 7 ; 215-228
1985-01-01
14 pages
Article (Journal)
Electronic Resource
English
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