Effect of seasonal variations in the neutral atmosphere on the ionization of the ionospheric E region

Details Effect of seasonal variations in the neutral atmosphere on the ionization of the ionospheric E region Effect of seasonal variations in the neutral atmosphere on the ionization of the ionospheric E region

Oct 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977ge%26ae..17..839i&link_type=abstract

Geomagnetizm i Aeronomiia, vol. 17, Sept.-Oct. 1977, p. 839-846. In Russian.

Physics

Annual Variations, Atmospheric Ionization, E Region, Ionizing Radiation, Solar Activity Effects, Critical Frequencies, Oxygen, Photoionization, Solar Flares, Solar X-Rays, Ultraviolet Radiation

Scientific paper

Observational data on the variation of critical E-region frequencies at midlatitudes during 31 solar flares in different seasons over a five-year period are analyzed. The relative contributions of solar UV and X radiation to E-region ionization are determined as a function of season. The results show that seasonal variations in these relative contributions are caused by an increase in the molecular oxygen concentration at E-region heights by a factor of 2 to 4 in the period from winter to summer.

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