Computer Science – Sound
Scientific paper
Feb 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992p%26ss...40..315b&link_type=abstract
Planetary and Space Science (ISSN 0032-0633), vol. 40, Feb.-Mar. 1992, p. 315-336.
Computer Science
Sound
65
Auroras, Geomagnetism, Nitric Oxide, Satellite Sounding, Thermosphere, Atmospheric Chemistry, Atmospheric Composition, Photochemical Reactions
Scientific paper
The paper investigates the causes of the high variability of the nitric-oxide density in the lower thermosphere (100-120 km) observed between 1982 and 1986 by SME. A plot of the latitudinal distribution of NO at times of high geomagnetic activity and high solar activity indicates that, at low latitudes, the variation in the NO density in the lower thermosphere is produced by variations in solar radiation (principally, the solar soft X-rays between 20 and 50 A). On the other hand, as clearly shown by model calculations, the NO variability in polar lower atmosphere is produced by the variation in the auroral electron flux. Calculations using a 1D photochemical model show that the relationship between the electron flux and the NO density is nonlinear.
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