Physics
Scientific paper
Dec 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006agufmsa23a..04b&link_type=abstract
American Geophysical Union, Fall Meeting 2006, abstract #SA23A-04
Physics
0355 Thermosphere: Composition And Chemistry, 0358 Thermosphere: Energy Deposition (3369), 2435 Ionospheric Disturbances, 2437 Ionospheric Dynamics
Scientific paper
The ionosphere and thermosphere recover from geomagnetic storms over periods of a day to a few days. Some information about the mechanisms for this recovery are understood, but the issue of what forces ionospheric and thermospheric recovery remains one of the least understood global-scale problems in our discipline. The importance of NO cooling to this recovery is known, which would suggest that the system should recover more quickly in solar maximum than in solar minimum. Yet, observations indicate that the ionosphere recovers faster during solar minimum than in solar maximum. It is possible that the heat capacity of the atmosphere in the two extremes of the solar cycle is responsible for the more rapid recovery at solar minimum. If so, first- principles models should reproduce the observed differences in recovery period. Therefore, we use the thermosphere ionosphere nested grid (TING) model in this presentation to investigate the rate of the recovery of the ionosphere/thermosphere system from geomagnetic storms. In addition, the physical processes responsible for the recovery in the two extremes of the solar cycle are studied to see how these processes have changed and to determine the role of heat capacity in the recovery rate.
Burns Alan G.
Killeen Tim L.
Mendillo Michael
Solomon Stanley C.
Wang Wenhong
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