Condensation of Methane, Ammonia, and Water and the Inhibition of Convection in Giant Planets

Details Condensation of Methane, Ammonia, and Water and the Inhibition of Convection in Giant Planets Condensation of Methane, Ammonia, and Water and the Inhibition of Convection in Giant Planets

Sep 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995sci...269.1697g&link_type=abstract

Science, Volume 269, Issue 5231, pp. 1697-1699

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10

Scientific paper

The condensation of chemical species of high molecular mass such as methane, ammonia, and water can inhibit convection in the hydrogen-helium atmospheres of the giant planets. Convection is inhibited in Uranus and Neptune when methane reaches an abundance of about 15 times the solar value and in Jupiter and Saturn if the abundance of water is more than about five times the solar value. The temperature gradient consequently becomes superadiabatic, which is observed in temperature profiles inferred from radio-occultation measurements. The planetary heat flux is then likely to be transported by another mechanism, possibly radiation in Uranus, or diffusive convection.

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