Physics
Scientific paper
Apr 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983icar...54..110w&link_type=abstract
Icarus (ISSN 0019-1035), vol. 54, April 1983, p. 110-132.
Physics
23
Annual Variations, Atmospheric Models, Convective Flow, Heat Flux, Radiative Heat Transfer, Uranus Atmosphere, Atmospheric Temperature, Methane, Planetary Orbits, Solar Flux
Scientific paper
A detailed investigation of radiative/convective models of the atmosphere of Uranus as a function of latitude and for a limited range of the orbital average internal heat flux is presented. The radiative flux is calculated using Rosseland mean opacities, the convective flux is calculated in the mixing length approximation, and a reasonable model for the deposited solar flux is used. The idea of Briggs and Andrew (1980) that the seasonal variation of convection might provide an explanation for the increasing microwave temperature of Uranus is extended. The orbital variation in the effective temperature at a given latitude is found to be essentially independent of the magnitude of the internal heat flow. The variation amounts to about 5 K at the pole and about 0.5 K at the equator. Depending on whether the methane mixing ratio is limited by its saturated vapor pressure in the convective region or not, the maximum convective flow could be short-lived or persist long. The consequences for both situations are discussed.
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