Physics
Scientific paper
Apr 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994jgr....99.8425s&link_type=abstract
Journal of Geophysical Research, vol. 99, no. E4, p. 8425-8440
Physics
7
Cloud Cover, Jupiter Atmosphere, Limb Darkening, Ammonia, Atmospheric Models, Error Analysis, Infrared Spectra, Methane, Near Infrared Radiation, Reflectance, Jupiter, Equatorial Region, Clouds, Structure, Limb Darkening, Aerosol, Model, Layering, Altitude, Ammonia, Optical Properties, Albedo, Vapor, Brightness, Condensation, Atmosphere, Abundance, Troposphere, Procedure, Temperature, Earth-Based Observations, Geometry, Reflectivity, Comparison, Analysis, Parameters, Position (Location), Depth, Hypotheses
Scientific paper
We have analyzed two data sets of Jupiter's limb darkening taken before (March 1990) and after (March 1991) a South Equatorial Belt (SEB) disturbance. The vertical aerosol structure has been determined for the SEB, the Equatorial Zone (EZ), and the North Equatorial Belt (NEB). We find that all regions can be well represented with a two-cloud layer model, with slightly higher NH3-cloud top altitude in the EZ than in the two belts. The cloud single-scattering albedos tilda-omegacl (determined within plus or minus 0.003) show little difference in the EZ (from 0.9956 to 0.9952) and the NEB (from 0.9925 to 0.9926) during a 1-year period, while a relatively larger decrease is found in the SEB from 0.9975 to 0.9957, indicating the recovery of the belt through the disturbance. The NH3-cloud top altitude in the SEB shows the most prominent change, lower in 1990 and higher in 1991. We suggest that the brightening and the darkening of the SEB may originate not only from the changes of tilda-omegacl but also from changes of the ammonia condensation level in the atmosphere, probably due to a decrease of the tropospheric temperature and/or an increase of the ammonia vapor.
Kawabata Kiyoshi
Satoh Takao
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