CH4 nonlocal thermodynamic equilibrium in the atmospheres of the giant planets

Details CH4 nonlocal thermodynamic equilibrium in the atmospheres of the giant planets CH4 nonlocal thermodynamic equilibrium in the atmospheres of the giant planets

Jun 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990icar...85..355a&link_type=abstract

Icarus (ISSN 0019-1035), vol. 85, June 1990, p. 355-379.

Computer Science

20

Gas Giant Planets, Methane, Molecular Relaxation, Planetary Atmospheres, Thermodynamic Equilibrium, Atmospheric Models, Boltzmann Distribution, Internal Energy, Radiative Transfer, Planets, Gas Planets, Methane, Thermodynamics, Equilibrium, Atmosphere, Absorption, Radiative Transfer, Models, Relaxation, Thermal Effects, Comparisons, Uranus, Theoretical Studies, Procedure, Calculations, Solar Effects, Heating, Collisions, Acetylene, Ethane, Jupiter, Neptune, Earth-Based Observations, Stratosphere, Vibration

Scientific paper

The present consideration of methane's vibrational relaxation in the Giant Planets' upper stratospheres employs a model for the thermalization of solar energy absorbed under non-LTE conditions, at the 1.7, 2.3. and 3.3 micron-centered CH4 band groups. On this basis, a range of model atmospheres was produced, reflecting current uncertainties concerning CH4 collisional excitation rates. At 0.1 mbar, all of the non-LTE models are within 2 K of the LTE reference models; the extreme non-LTE models steadily depart from reference LTE ones, however, and reach about + or - 20 K at 0,1 mbar.

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