Mathematics
Scientific paper
Feb 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982icar...49..213m&link_type=abstract
Icarus, vol. 49, Feb. 1982, p. 213-226.
Mathematics
71
Atmospheric Chemistry, Gas Giant Planets, Ortho Hydrogen, Ortho Para Conversion, Para Hydrogen, Planetary Atmospheres, Aerosols, Catalysis, Jupiter Atmosphere, Reaction Kinetics, Saturn Atmosphere, Temperature Profiles, Uranus Atmosphere, Planets, Jupiter, Jovian Planets, Saturn, Uranus, Hydrogen, Heat, Chemistry, Atmosphere, Aerosols, Particles, Pressure, Collisions, Clouds, Temperature, Mathematical Models, Eddy Coefficients, Data, Thermodynamics, Mixing
Scientific paper
A mechanism is proposed which partially equilibrates the para and ortho rotational levels of molecular hydrogen in the atmospheres of Jupiter, Saturn, and Uranus. Catalytic reactions between the free-radical surface sites of aerosol particles and hydrogen modecules yield significant equilibration near 1 bar pressure, if the efficiency of conversion per collision is between 10 to the -8th and 10 to the -10th and the effective eddy mixing coefficient is 10,000 sq cm/sec. At lower pressures the ortho-para ratio retains the value at the top of the cloud layer, except for a very small effect from conversion in the thermosphere. The influence of conversion on the specific heat and adiabatic lapse rate is also investigated. The effect is found to be generally small, though is can rise to 10% inside the aerosol layer.
Hunten Don M.
Massie Steve T.
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