Uptake of ammonia gas by Jovian ices

Details Uptake of ammonia gas by Jovian ices Uptake of ammonia gas by Jovian ices

Oct 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011epsc.conf..352k&link_type=abstract

EPSC-DPS Joint Meeting 2011, held 2-7 October 2011 in Nantes, France. http://meetings.copernicus.org/epsc-dps2011, p.352

Physics

Scientific paper

The altitude profile of ammonia (NH3) in Jupiter's atmosphere, as constrained by microwave spectra, is poorly understood. A global-scale NH3 depletion mechanism appears to be operating between the 2- and 6-bar levels. Candidate depletion mechanisms include dynamics, condensation, and adsorption of NH3 onto ices. Laboratory measurements of NH3 uptake provide valuable constraints for model calculations testing the NH3 depletion hypothesis in Jupiter's atmosphere. We have performed experiments designed to measure the uptake coefficient of NH3 by H2O ice using a Knudsen cell apparatus at temperatures relevant to the troposphere of Jupiter. We have initiated model calculations to apply the experimental results to Jupiter's atmosphere and evaluate the key parameters and processes that influence the ammonia uptake and their relevance to Jupiter's atmosphere.

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