Physics
Scientific paper
Nov 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986icar...68..313g&link_type=abstract
Icarus (ISSN 0019-1035), vol. 68, Nov. 1986, p. 313-343. SERC-supported research.
Physics
18
Atmospheric Models, Baroclinic Instability, Saturn Atmosphere, Brightness Distribution, Northern Hemisphere, Pressure Distribution, Ribbons, Wind Shear, Saturn, Models, Atmosphere, Features, Structure, Description, Motion, Voyager Missions, Spacecraft Observations, Baroclinity, Circulation, Rotation, Spectrometry, Infrared, Wavelengths, Brightness, Stability, Hypotheses, Numerical Methods, Latitude, Iris Instrument, Photographs, Intensity, Thermal Properties, Oscillations, Calculations
Scientific paper
The 'ribbon' feature of Saturn is a narrow, dark, oscillatory structure that encircles the planet in the light zone at 45 to 50 deg N. Zonal circulation measurements indicate that it is located in a 120 m/sec westerly jet with small meridional velocity; the regions adjacent to the ribbon are of similar brightness except in UV filter images, where the northern part of this zone is lighter than the southern section. It is suggested that the ribbon feature could arise from a baroclinic instability; a numerical model is developed for such an instability that is consistent with the observed wavelength, the vertical extent of the ribbon, and the local latitudinal thermal profile.
Godfrey D. A.
Moore V.
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