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Pioneer 10 and 11 and ground-based infrared data on Jupiter - The thermal structure and He-H2 ratioTemperature profiles for four midlatitude regions on Jupiter and an improved value of the H2 molar mixing ratio are obtained from Pioneer 11 IR radiometer data and ground-based IR spectral data. The investigated regions include two in the Southern Hemisphere and two in the Northern Hemisphere, all of which consist of an adjacent belt and zone. The temperature profiles for the pressure regime between 0.1 and 1.0 bar are plotted along with the emitted net flux, flux divergence, and cooling rate for a temperature profile that is an average of those derived for the South Equatorial Belt and a 'cloudy' model of the South Tropical Zone. Averaging of the results obtained with clear and cloudy zone models yields a weighted mean value of 0.88 for the H2 molar mixing ratio, which corresponds to a He/H2 ratio of 0.14. It is emphasized that this value depends on perfect validity of the adopted opacity model, the absence of systematic errors in the data, and other factors. Local effective temperatures for each region are found to range from 124.2 to 127.6 K, which are close to the model-independent global average of 125 K.
Document ID
19770029160
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Orton, G. S.
(California Inst. of Tech. Pasadena, CA, United States)
Ingersoll, A. P.
(California Institute of Technology Pasadena, Calif., United States)
Date Acquired
August 8, 2013
Publication Date
January 1, 1976
Subject Category
Lunar And Planetary Exploration
Meeting Information
Meeting: Colloquium on Jupiter: Studies of the interior, atmosphere, magnetosphere and satellites
Location: Tucson, AZ
Start Date: May 19, 1975
End Date: May 21, 1975
Accession Number
77A12012
Funding Number(s)
CONTRACT_GRANT: NGL-05-002-003
Distribution Limits
Public
Copyright
Other

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