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A thermosphere/ionosphere general circulation model with coupled electrodynamicsA new simulation model of upper atmospheric dynamics is presented that includes self-consistent electrodynamic interactions between the thermosphere and ionosphere. This model calculates the dynamo effects of thermospheric winds, and uses the resultant electric fields and currents in calculating the neutral and plasma dynamics. A realistic geomagnetic field geometry is used. Sample simulations for solar maximum equinox conditions illustrate two previously predicted effects of the feedback. Near the magnetic equator, the afternoon uplift of the ionosphere by an eastward electric field reduces ion drag on the neutral wind, so that relatively strong eastward winds can occur in the evening. In addition, a vertical electric field is generated by the low-latitude wind, which produces east-west plasma drifts in the same direction as the wind, further reducing the ion drag and resulting in stronger zonal winds.
Document ID
19920048494
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Richmond, A. D.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Ridley, E. C.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Roble, R. G.
(High Altitude Observatory Boulder, CO, United States)
Date Acquired
August 15, 2013
Publication Date
March 20, 1992
Publication Information
Publication: Geophysical Research Letters
Volume: 19
ISSN: 0094-8276
Subject Category
Geophysics
Accession Number
92A31118
Funding Number(s)
CONTRACT_GRANT: NASA ORDER S-42040-E
Distribution Limits
Public
Copyright
Other

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