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Abstract

In the middle and high latitude atmosphere below 100 km altitude the principal sources of ionization are l) solar radiation in the x–ray and extreme ultraviolet wavelengths, 2) galactic cosmic rays and other galactic radiations, and 3) precipitating energetic particles of solar origin and from the earth’s radiation belts. In this paper the relative contribution of each of these source terms to the maintenance of the dynamic ionosphere is reviewed. The significant role of electron precipitation and the associated bremsstrahlung to the ionization and modification of the neutral atmosphere is presented. The important role of solar particle events in both ionizing the atmosphere and in producing and modifying key minor neutral constituents such as ozone, atomic oxygen, and the nitric oxides is illustrated.

Keywords

Magnetic Storm Stratospheric Ozone Solar Proton Event Electron Precipitation Magnetic Latitude 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© D. Reidel Publishing Company, Dordrecht, Holland 1977

Authors and Affiliations

  • J. B. Reagan
    • 1
  1. 1.Lockheed Palo Alto Research LaboratoryPalo AltoUSA

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