Interactive ionosphere modeling: A comparison between tigcm and ionosonde data. (Reannouncement with new availability information)
Results from a time dependent geomagnetic storm simulation of the coupled thermosphere and ionosphere using the new interactive thermosphere-ionosphere general circulation model (TIGCM) (Roble et al.) of the National Center for Atmospheric Research are compared with F2-layer data obtained from a latitudinal chain of East Asian ionosonde stations situated close to the {minus}165 deg magnetic meridian and separated by about 5 deg in magnetic latitude. This is among the first extended comparisons (10 days) between the TIGCM modeled ionosphere and data, where the effects of neutral dynamics on the ionosphere are studied using a global, fully interactive thermosphere-ionosphere model. The ionosonde stations provide latitudinal coverage that extends from 15 deg to 50 deg magnetic north. Hourly values from both the simulation results and ionosonde data for hmF2, foF2, and meridional neutral winds, for the period March 19-28, 1979, are fitted in latitude using Legendre polynomials, and variations from quiet-time values are displayed in latitude-UT coordinates. Color graphics for both the simulation and data are used to illustrate the equatorward penetration of ionospheric disturbances and their dependence on Kp, storm time, and local time. Observed effects are interpreted in terms of plausible electric field, neutral wind, and neutral composition changes during the storm period and where possible.
- Research Organization:
- Boston Univ., MA (United States)
- OSTI ID:
- 177459
- Report Number(s):
- AD-A--254025/0/XAB; CNN: Contract F4620-92-J-0092
- Country of Publication:
- United States
- Language:
- English
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