Possible microwave absorption by H2S gas in Uranus' and Neptune's atmospheres

Details Possible microwave absorption by H2S gas in Uranus' and Neptune's atmospheres Possible microwave absorption by H2S gas in Uranus' and Neptune's atmospheres

Jun 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991icar...91..220d&link_type=abstract

Icarus (ISSN 0019-1035), vol. 91, June 1991, p. 220-233.

Mathematics

Probability

41

Brightness Temperature, Hydrogen Sulfide, Microwave Attenuation, Neptune Atmosphere, Uranus Atmosphere, Atmospheric Circulation, Atmospheric Composition, Atmospheric Models, Infrared Spectra, Line Spectra, Very Large Array (Vla)

Scientific paper

The disk-averaged brightness temperatures of the present 3.55 and 20.1 cm VLA observations are consistent with the planet's thermal spectra. It is estimated, on the basis of calculations which encompass microwave absorption by H2S, that the H2S mixing ratio on both Uranus and Neptune is probably enhanced by a factor of 10-30 above the elemental sulfur solar ratio. There is also more microwave opacity in the Neptune atmosphere than that of Uranus; this may be due to the presence of NH3 gas above the NH4SH cloud layer. Radio occultation data comparisons indicate the probability of NH3's supersaturation in the Neptune atmosphere.

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