Astronomy and Astrophysics – Astronomy
Scientific paper
Nov 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988icar...76..378j&link_type=abstract
Icarus (ISSN 0019-1035), vol. 76, Nov. 1988, p. 378-382.
Astronomy and Astrophysics
Astronomy
4
Jupiter Atmosphere, Methane, Microwave Attenuation, Microwave Transmission, Water Vapor, Absorption Spectra, Abundance, Emission Spectra, Frequency Distribution, Pressure Distribution, Radio Astronomy
Scientific paper
The authors have measured the microwave absorption of methane and water vapor under simulated Jovian conditions at 13.3 cm, 3.5 cm, and 1.38 cm. The results are consistent with theoretical expressions for microwave opacity in a Jovian atmosphere at the specified frequencies. The upper limits on the microwave opacity due to methane show that methane cannot be responsible for the additional opacity inferred between 10 and 20 cm. The upper limits on the microwave opacity due to water vapor suggest that it is unlikely that the presence of water vapor can account for this excess absorption. This supports the presence of an ammonia abundance which exceeds a solar abundance by a factor of 1.5 in the 2- to 6-bar levels in Jupiter's atmosphere.
Jenkins Jon Michael
Steffes Paul Gregory
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