Effect of chemical kinetics uncertainties on hydrocarbon production in the stratosphere of Neptune

Details Effect of chemical kinetics uncertainties on hydrocarbon production in the stratosphere of Neptune Effect of chemical kinetics uncertainties on hydrocarbon production in the stratosphere of Neptune

May 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998p%26ss...46..491d&link_type=abstract

Planetary and Space Science, v. 46, p. 491-505.

Computer Science

29

Scientific paper

The imprecise nature of reaction and photolysis rates used in photochemical models can introduce significant uncertainties on computed concentrations. In this paper, we use a box photochemical model of hydrocarbons in the atmosphere of Neptune. The scheme of reactions derived from Dobrijevic (1996) contains 32 species and 189 reactions. The set of continuity equations is integrated with the method of Gear (Gear, 1971). A Monte-Carlo technique is used to introduce random uncertainty in rate coefficients and to estimate uncertainties in computed concentrations. Significant deviations from mean value have been obtained : 100% for C2-compounds, 200% for C3-compounds and more than 2000% for higher hydrocarbons. Implications for one-dimension photochemical models are discussed.

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