Trace Molecules in Giant Planet Atmospheres

Details Trace Molecules in Giant Planet Atmospheres Trace Molecules in Giant Planet Atmospheres

Dec 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010agufm.p31a1514h&link_type=abstract

American Geophysical Union, Fall Meeting 2010, abstract #P31A-1514

Physics

[0317] Atmospheric Composition And Structure / Chemical Kinetic And Photochemical Properties, [0341] Atmospheric Composition And Structure / Middle Atmosphere: Constituent Transport And Chemistry, [5704] Planetary Sciences: Fluid Planets / Atmospheres, [5709] Planetary Sciences: Fluid Planets / Composition

Scientific paper

Chemical kinetics matters in the upper atmospheres of giant planets in our solar system and in extrasolar systems. The composition of a volume of gas depends not only on where it is, but also on how it got there. The giant planets in our own solar system still have much to teach us about what we will be observing on extrasolar giant planets and how to interpret what we observe. Some molecules, such as CO, C2H2, C2H6, PH3, and NH3, which we call tracer molecules, provide remotely observable signatures of vertical transport. PH3 and NH3 especially have complicated thermochemistry and chemical kinetics that, until recently, have been poorly understood. Based on analysis of recent literature, we have identified new chemical mechanisms for interconverting NH3 and N2 and for interconverting PH3 and NH4-H2PO4.

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