Relaxation to photochemical equilibrium of charged species within displaced air parcels in the D-region

Details Relaxation to photochemical equilibrium of charged species within displaced air parcels in the D-region Relaxation to photochemical equilibrium of charged species within displaced air parcels in the D-region

Jun 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979jatp...41..607h&link_type=abstract

Journal of Atmospheric and Terrestrial Physics, vol. 41, June 1979, p. 607-623.

Physics

Atmospheric Chemistry, Atmospheric Ionization, Chemical Equilibrium, D Region, Molecular Relaxation, Photochemical Reactions, Atmospheric Models, Ionospheric Ion Density, Molecular Ions, Oxygen Ions, Particle Production, Reaction Kinetics

Scientific paper

The effects of the relaxation to photochemical equilibrium are investigated for the electrons and NO(+) ions in the upper D-region and for the electrons and several species of positive and negative ions present in the lower D-region. In the upper D-region the photochemical model includes electrons, nitric oxide, and NO(+). A self-consisting model of the equilibrium concentrations is developed for the lower D-region, which includes electrons, nitric oxide, O2(-), heavy negative and positive ions, and the oxygen species O, O3, and O2(1 delta g). At altitudes of 75 and 80 km the time dependence of the oxygen species has a significant effect on the equilibration of the electron and O2(-) concentrations. The relaxation to photochemical equilibrium proceeds by five e-folding time scales in the lower D-region, where the time required for final equilibration due to recombination is very long.

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