Using Sensitivity Analysis to Identify Critical Rate Parameters for Jovian Planet Photochemistry

Details Using Sensitivity Analysis to Identify Critical Rate Parameters for Jovian Planet Photochemistry Using Sensitivity Analysis to Identify Critical Rate Parameters for Jovian Planet Photochemistry

Dec 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002agufmsa71a..11s&link_type=abstract

American Geophysical Union, Fall Meeting 2002, abstract #SA71A-11

Astronomy and Astrophysics

Astronomy

0317 Chemical Kinetic And Photochemical Properties, 0343 Planetary Atmospheres (5405, 5407, 5409, 5704, 5705, 5707)

Scientific paper

A direct local sensitivity analysis technique, using the Senkin program from Sandia, has been applied to 0-D boxes of output from a 1-D Jupiter photochemistry model supplied by Dr. J. Moses using the Caltech-JPL CTM code. Results systematically and quantitatively predict each species variation with each rate parameter, along with terms for non-local effects. This procedure tracks chemically sensitive observations, and identifies steps and product ratios requiring further investigation; it can suggest field measurements, and the accuracies required of the kinetics. Key photolysis processes, H atom addition reactions to various hydrocarbon molecules and radicals, and methyl recombination to form ethane are identified. The use of kinetics rate theory approaches such as RRKM theory to provide low pressure and temperature rate constant values for these reactions will be described, noting uncertainties when relevant data are unavailable or limited. Supported by NASA Planetary Atmospheres and NSF Planetary Astronomy Programs. D.A.N. was sponsored by an NSF Research Experiences for Undergraduates grant.

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