Physics
Scientific paper
Sep 1975
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975georl...2..389b&link_type=abstract
Geophysical Research Letters, vol. 2, Sept. 1975, p. 389-392.
Physics
3
Annual Variations, Diurnal Variations, Hydrogen Atoms, Ionospheric Composition, Satellite Observation, Atmospheric Models, F 2 Region, Latitude, Solstices, Winter
Scientific paper
In situ mass spectrometric measurements of ion and neutral particle thermospheric compositions have been used to infer the latitudinal and diurnal variations of thermospheric atomic hydrogen for solstice conditions. Local time-dependent and local time-independent components of the observed hydrogen distribution were separated on the basis of a model generated by expanding the log of neutral hydrogen concentration in terms of spherical harmonics. Results are compared with analogous data on N2 concentration; the comparison reveals an anticorrelation between gas temperature and hydrogen concentration. The slope of this anticorrelation line represents the 'zero flux condition' from the exosphere theory of Hodges (1973), thus further bearing out the conclusion that exospheric flow is the dominant process governing the global distribution of hydrogen.
Brinton Henry C.
Mayr Hans G.
Potter W. E.
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