Other
Scientific paper
Nov 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987jgr....9212365r&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 92, Nov. 1, 1987, p. 12365-12376. NASA-supported research.
Other
55
Atmospheric Circulation, Electric Fields, Electrodynamics, Thermosphere, Wind Effects, Atmospheric Models, Current Distribution, Dynamo Theory, Ionospheric Currents, Magnetic Effects, Temporal Distribution
Scientific paper
Electrodynamic effects of thermospheric winds simulated with the NCAR thermospheric general circulation model (TGCM) were modeled and compared with observations for equinox solar minimum conditions. Two TGCM wind simulations were used: one driven only by in situ solar UV heating, the other also including lower boundary forcing that mimics the effects of upward propagating semidiurnal tides. It was found that, without tidal forcing, the TGCM winds produce ground magnetic variations that have the general pattern of observed Sq variations, but are only about half as strong. The addition of tidal forcing improved the agreement between calculated and observed magnetic variations and between calculated and observed electric fields.
Richmond Arthur D.
Roble Raymond G.
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