Global variation of the para hydrogen fraction in Jupiter's atmosphere and implications for dynamics on the outer planets

Details Global variation of the para hydrogen fraction in Jupiter's atmosphere and implications for dynamics on the outer planets Global variation of the para hydrogen fraction in Jupiter's atmosphere and implications for dynamics on the outer planets

Feb 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984icar...57..184c&link_type=abstract

Icarus (ISSN 0019-1035), vol. 57, Feb. 1984, p. 184-204. NASA-supported research.

Other

105

Atmospheric Circulation, Atmospheric Composition, Jupiter Atmosphere, Para Hydrogen, Planetary Composition, Spatial Distribution, Atmospheric Temperature, Infrared Spectra, Planetology, Spectrum Analysis, Thermodynamic Equilibrium, Voyager 1 Spacecraft, Voyager 2 Spacecraft, Jupiter, Atmosphere, Hydrogen, Giant Planets, Dynamics, Wavelengths, Infrared, Spectra, Voyager 1, Voyager 2, Pressure, Equatorial Regions, Analysis, Latitudes, Temperature, Clouds, Aerosols, Models, Abundance, Comparisons, Thermal Effe

Scientific paper

A detailed analysis of the Voyager infrared spectrometer measurements on Jupiter's atmosphere is presented, and possible implications of para hydrogen disequilibrium for the energetics and dynamics of that atmosphere are examined. The method of data analysis is described, and results for the large scale latitude variation of the para hydrogen fraction are presented. The Jovian results show pronounced latitude variation, and are compared with other parameters including wind fields, thermal structure, and various indicators of atmospheric clouds. The problem of equilibration rate is reexamined, and it is concluded that on Jupiter the equilibration time is longer than the radiative time constant at the level of emission to space, but that this inequality reverses at greater depths. A model for the interaction of fluid motions with the ortho-para conversion process is presented, and a consistent mixing length theory for the reacting ortho-para mixture is developed. Several implications of the Jovian data for atmospheric energetics and stability on the outer planets are presented.

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