Computer Science
Scientific paper
Jan 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989stin...8920051c&link_type=abstract
Unknown
Computer Science
Atmospheric Circulation, Atmospheric Models, Atmospheric Temperature, Dynamic Models, Jupiter Atmosphere, Periodic Variations, Planetary Temperature, Saturn Atmosphere, Stratosphere, Troposphere, Uranus Atmosphere, Zonal Flow (Meteorology), Friction Factor, Meridional Flow, Temperature Gradients, Time Constant
Scientific paper
A zonally symmetric, linear radiative-dynamical model is compared with observations of the upper tropospheres and stratospheres of the outer planets. Seasonal variation is included in the model. Friction is parameterized by linear drag (Rayleigh friction). Gas opacities are accounted for but aerosols are omitted. Horizontal temperature gradients are small on all the planets. Seasonal effects are strongest on Saturn and Neptune but are weak even in these cases, because the latitudinal gradient of radiative heating is weak. Seasonal effects on Uranus are extremely weak because the radiative time constant is longer that the orbital period. One free parameter in the model is the frictional time constant. Comparison with observed temperature perturbations over zonal currents in the troposphere shows that the frictional time constant is on the same order as the radiative time constant for all these objects. Vertical motions predicted by the model are extremely weak. They are much smaller than one scale height per orbital period, except in the immediate neighborhood of tropospheric and zonal currents.
Conrath Barney J.
Gierasch Peter J.
Leroy Stephen S.
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