Ion-ion recombination rates in the earth's atmosphere

Details Ion-ion recombination rates in the earth's atmosphere Ion-ion recombination rates in the earth's atmosphere

May 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977p%26ss...25..433s&link_type=abstract

Planetary and Space Science, vol. 25, May 1977, p. 433-439. Research supported by the Science Research Council.

Computer Science

12

Earth Atmosphere, Ion Recombination, Nitrogen Oxides, Recombination Coefficient, Temperature Effects, Aeronomy, Atmospheric Composition, Helium Afterglow, Ion Temperature, Vertical Distribution

Scientific paper

The temperature dependence of the binary recombination coefficient for the reaction NO(+) + NO2(-) yields products has been obtained over the range from 185 to 530 K. It is found that the corresponding mean cross section is described by a power law. Data have also been obtained for two cluster ion recombination reactions which indicate that their recombination cross sections are only about 40% larger than for the parent ions at a given temperature; the cross sections for these reactions also apparently increase with decreasing temperature. In the light of these data and by considering the most probable positive and negative ions existing at various altitudes up to 90 km in the atmosphere, the most appropriate ionic recombination coefficients in various altitude ranges are deduced. Thus, between 30 and 90 km, where the recombination process is two-body, the coefficient varies over the narrow range from 5 to 9 hundred-millionths cu cm/s, while below 30 km the process is predominantly three-body with an effective two-body rate increasing rapidly to a maximum value of about 3 millionths cu cm/s in the troposphere. These deductions are based on published laboratory determinations of three-body recombination coefficients.

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