Other
Scientific paper
Dec 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978phdt........75p&link_type=abstract
Thesis (PH.D.)--NEW YORK UNIVERSITY, SCHOOL OF ENGINEERING AND SCIENCE, 1978.Source: Dissertation Abstracts International, Volu
Other
Scientific paper
A one dimensional model has been used to calculate the distributions of minor species (i.e., other than H(,2) and He) in the Jovian atmosphere. The requirement fulfilled by this model is that all minor constituents be treated as functions to be computed from the coupled set of species continuity equations. Large quantities of hydrocarbons are found to result from the photolysis of CH(,4). The most abundant hydrocarbon molecules predicted to be present in the stratosphere, after CH(,4) are C(,2)H(,6), C(,2)H(,2), C(,3)H(,8) and C(,2)H(,4). Their estimated mixing ratios are 6 x 10(' -6), 4 x 10('-8), 1 x 10('-9) and (TURN)5 x 10('-10). More favorable conditions for the formation of heavier hydrocarbons could exist on other planets, and include a higher C/H ratio, escape of hydrogen and the photochemical destruction of methane by means other than photolysis. Relatively large concentrations of free radicals are predicted to exist in the troposphere. The importance of several hypothetical reactions, involving these radicals is noted. These reactions may result in the formation of large quantities of aminophosphine and diphosphine. Both of these substances may make important contributions to the formation of a stratospheric aerosol layer on Jupiter. It is concluded that CO is well mixed throughout the stratosphere. However, because of a lack of kinetic data a statement regarding its tropospheric distribution cannot be made at the present time. The present chemical scheme predicts that C(,2)H(,2) will be well mixed throughout the troposphere. However, rate coefficients for the reactions of CO, C(,2)H(,2) and C(,2)H(,4) with NH(,2) and PH(,2) radicals should be measured. If rate coefficients for these reactions are fast enough, important tropospheric sources of more complex organic molecules can exist.
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