Comparison of calculated and measured ion densities on the dayside of Venus

Details Comparison of calculated and measured ion densities on the dayside of Venus Comparison of calculated and measured ion densities on the dayside of Venus

Jul 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979sci...205..107n&link_type=abstract

Science, vol. 205, July 6, 1979, p. 107-109.

Astronomy and Astrophysics

Astronomy

1

Astronomical Models, Atmospheric Models, Ion Density (Concentration), Venus Atmosphere, Carbon Dioxide, Carbon Monoxide, Helium Ions, Hydrogen Ions, Ion Distribution, Mass Spectrometers, Mathematical Models, Molecular Ions, Nitrogen Ions, Nitrogen Oxides, Oxygen Ions, Pioneer Venus Spacecraft, Density, Ions, Venus, Oxygen, Pioneer Venus, Models, Hydrogen, Mass Spectrometers, Equilibrium, Helium, Carbon Dioxide, Diffusion, Dayside, Carbon Monoxide, Orbiter Ion Mass Spectrometer (Oims), Nitrogen, Transport

Scientific paper

Data from the Pioneer Venus ion mass spectrometers are compared with model calculations of the ion density distributions appropriate for daytime conditions. The model assumes diffusive equilibrium upper boundary conditions for the major ions (O2(+), O(+), CO2(+), He(+), and H(+)); the agreement between the calculated and measured gross behavior of these ions is reasonably good except for H(+), which may be influenced strongly by convective transport processes. The distributions of five minor ions (C(+), N(+), NO(+), CO(+), and N2(+)) are also calculated for the chemically controlled region (less than approximately 200 km); the agreements are, in general, poor, an indication that the present understanding of the Venus minor ion chemistry is still incomplete.

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