Physics
Scientific paper
Apr 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992jgr....97.4177b&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 97, no. A4, April 1, 1992, p. 4177-4187. Research supported by NCAR.
Physics
12
Atmospheric General Circulation Models, Earth Ionosphere, Equatorial Atmosphere, Magnetic Storms, Solar Terrestrial Interactions, Thermosphere, Auroral Zones, Magnetoactivity, Solar Wind
Scientific paper
Attention is given to the effects of geomagnetic activity on the equatorial neutral thermosphere, investigated with mass spectrometer measurements from the Atmosphere Explorer (AE-E) and simulations generated by the National Center for Atmospheric Research thermosphere/ionosphere general circulation model (TIGCM). The AE-E measurements demonstrate that significant geomagnetic storm-induced perturbations of upper thermospheric N2 and O densities extend into the equatorial zone but are mainly restricted to the midnight/early morning sector. The qualitative features of the observations are reproduced by the TIGCM, although, in general, the model simulations overestimate the storm-temperature and density enhancements, primarily in the nighttime thermosphere. It is suggested that either the nighttime cooling rates in the TIGCM are too small or that the specified auroral forcings of the model are too persistent.
Abreu Vincent J.
Burrage Mark D.
Fesen C. G.
Orsini N.
Roble Raymond G.
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