Physics
Scientific paper
Jun 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985jgr....90.5261r&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 90, June 1, 1985, p. 5261-5268.
Physics
53
Hydrogen Ions, Ionospheric Ion Density, Plasmasphere, Solar Cycles, Solar Terrestrial Interactions, Annual Variations, Diurnal Variations, Magnetic Flux, Solar Activity
Scientific paper
Seasonal and solar cyclical variations in the limiting H(+) flux are compared over the solar minimum-to-maximum interval 1974-80. The comparisons are made on the bases of values derived with the MSIS-83 and -77 models, which in turn are based on Atmospheric Explorer-E O(+) and H(+) data from the ionosphere. The H(+) flux is obtained by integration of the H(+) continuity equation along magnetic flux tubes. The seasonal and cyclical variations are dominated by the neutral hydrogen density, although the O(+) boundary density, scale height and O(+)-H reaction somewhat ameliorate the changes caused by the density variations. Finally, the plasmasphere experienced an order of magnitude decrease in H(+) in going from solar minimum to maximum, which could have been caused by longer limiting flux escapes through more, longer-lived, shorter flux tubes.
Richards Paul G.
Torr Douglas G.
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