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The dynamo of the diurnal tide and its effect on the thermospheric circulationA theoretical multiconstituent model (including O, N2, and O2) which describes the interactions between neutral winds, dynamo electric fields, and ion drifts is used to interpret observations that revealed a dominance of the fundamental diurnal tide in the upper thermosphere and at equatorial latitudes, and its effect on the thermospheric circulation. The model is shown to reproduce reasonably well the magnitudes of the neutral winds, ion drift velocities, and the ratio between the two. A solution for the neutral winds in which the dynamo electric field is forced to zero shows that the dynamo-induced ion drift is very important in accelerating the neutral atmosphere at higher altitudes. The dynamo interaction primarily affects the curl component of the field; its effect on the temperature and density perturbations is small.
Document ID
19900038069
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Mayr, H. G.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Harris, I.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Herrero, F. A.
(NASA Goddard Space Flight Center Greenbelt, MD, United States)
Date Acquired
August 14, 2013
Publication Date
February 1, 1990
Publication Information
Publication: Planetary and Space Science
Volume: 38
ISSN: 0032-0633
Subject Category
Geophysics
Accession Number
90A25124
Distribution Limits
Public
Copyright
Other

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