Physics
Scientific paper
Aug 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985georl..12..491h&link_type=abstract
Geophysical Research Letters (ISSN 0094-8276), vol. 12, Aug. 1985, p. 491-494.
Physics
32
Atmospheric Pressure, Equatorial Atmosphere, Ionospheric Drift, Pressure Effects, Thermosphere, Wind Variations, Atmospheric Temperature, Differential Equations, E Region, F Region
Scientific paper
The paper is concerned with the effect of the equatorial midnight pressure on the nighttime zonal winds in the altitude range 300-400 km. The analysis is based on zonal momentum balance of measured quantities at the specified altitude combined with the nighttime average-pressure variations given by the Atmosphere Explorer-E (AE-E) satellite and the ion density given by the model of Chiu (1975). It is found that the nighttime pressure variation obtained from temperatures and densities measured on AE-E is consistent with the observed variations in the zonal wind and that the zonal wind decay time due to ion drag and viscosity reasonably accounts for the observed decay in velocity leading to the midnight minimum.
Fejer Bela G.
Hedin Alan E.
Herrero Federico A.
Mayr Hans G.
Spencer Nelson W.
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