The upper atmosphere of Uranus - A critical test of isotropic turbulence models

Details The upper atmosphere of Uranus - A critical test of isotropic turbulence models The upper atmosphere of Uranus - A critical test of isotropic turbulence models

Sep 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982icar...51..491f&link_type=abstract

Icarus, vol. 51, Sept. 1982, p. 491-508. Research supported by the Observatoire de Paris and Universite de Paris Centre National

Computer Science

16

Atmospheric Models, Atmospheric Temperature, Atmospheric Turbulence, Isotropic Turbulence, Turbulence Models, Uranus Atmosphere, Atmospheric Boundary Layer, Cross Correlation, Light Curve, Planetary Limb, Temperature Profiles

Scientific paper

Observations of the August 15, 1980, Uranus occultation of KM 12, obtained from Cerro Tololo InterAmerican Observatory, European Southern Observatory, and Cerro Las Campanas Observatory, are used to compare the atmospheric structure at points separated by approximately 140 km along the planetary limb. The results reveal striking, but by no means perfect correlation of the light curves, ruling out isotropic turbulence as the cause of the light curve spikes. The atmosphere is strongly layered, and any acceptable turbulence model must accommodate the axial ratios of greater than about 60 which are observed. The mean temperature of the atmosphere is 150 plus or minus 15 K for the region near number density 10 to the 14th per cu cm. Derived temperature variations of vertical scale approximately 130 km and amplitude plus or minus 5 K are in agreement for all stations, and correlated spikes correspond to low-amplitude temperature variations with a vertical scale of several kilometers.

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