Record number :
2309403
Title of article :
Uncertainty analysis of bimolecular reactions in Titan ionosphere chemistry model
Author/Authors :
Carrasco، نويسنده , , N. and Dutuit، نويسنده , , O. and Thissen، نويسنده , , R. and Banaszkiewicz، نويسنده , , M. and Pernot، نويسنده , , P.، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2007
Pages :
17
From page :
141
To page :
157
Abstract :
We report about the first detailed uncertainty analysis concerning the kinetics parameters of the ion–molecule reactions included in a Titanʹs ionospheric chemistry model. Uncertainty propagation has been performed by Monte Carlo sampling. Different possible descriptions of the uncertainties on the rate constants are discussed and compared on the basis of our state of knowledge about ion–molecule reaction rates laboratory measurements. We propose also a new method for the treatment of branching ratios correlated uncertainties. We show that the uncertainty on branching ratios contribute significantly to the uncertainty on ion densities predicted by the chemistry model. Simulation of a mass spectrum for ionic species in Titan ionosphere at 1200 km of altitude and night-time chemistry has been performed and compared to the INMS mass-spectrum available on the website of the NASA 〈 http://photojournal.jpl.nasa.gov/catalog/PIA07865 〉 ], corresponding to Cassiniʹs T5 flyby.
Keywords :
Titan , Ionospheric chemistry , branching ratio , Chemical rate constant , mass spectrum , Monte Carlo uncertainty propagation , Elicitation
Journal title :
PLANETARY AND SPACE SCIENCE
Serial Year :
2007
Link To Document :
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