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Kinetics of hydrocarbons at low temperature: Suggestions based on photochemical models in the outer solar system

Lee, Anthony Y. T. and Yung, Yuk L. and Moses, Julianne I. (2000) Kinetics of hydrocarbons at low temperature: Suggestions based on photochemical models in the outer solar system. In: 219th ACS National Meeting, 26-30 March 2000, San Francisco, CA. https://resolver.caltech.edu/CaltechAUTHORS:20141216-133144921

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Abstract

Recent measurements of methyl radicals (CH_3) in the upper atmospheres of Saturn and Neptune by the Infrared Space Observatory (ISO) provide new constraints to photochemical model of hydrocarbon chemistry in the outer solar system, and the low-temperature hydrocarbon kinetics. The derived column abundances of CH_3 on Saturn above 10 mbar and Neptune above the 0.2 mbar pressure level are (2.5-6.0) * 10^(13) cm^(-2) and (0.7-2.8) * 10^(13) cm^(-2), respectively. These observations imply a kinetically sensitive test to the measured and estimated hydrocarbon rate constants at low temperatures. We use the updated Caltech/JPL photochemical model, which incorporates hydrocarbon photochemistry, vertical molecular and bulk atmospheric eddy diffusion, and realistic radiative transfer modeling, to study the CH_3 abundances in the upper atmosphere of the giant planets (Jupiter, Saturn, Uranus, Neptune) and Titan.


Item Type:Conference or Workshop Item (Paper)
ORCID:
AuthorORCID
Yung, Yuk L.0000-0002-4263-2562
Moses, Julianne I.0000-0002-8837-0035
Additional Information:© 2000 American Chemical Society.
Record Number:CaltechAUTHORS:20141216-133144921
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20141216-133144921
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:52881
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:16 Dec 2014 21:42
Last Modified:06 Nov 2019 18:26

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