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Isotopic exchange between carbon dioxide and ozone via O(1D) in the stratosphere
Y L Yung1, W B DeMore, J P Pinto
1Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena 91125, USA.
Geophysical Research Letters
|January 1, 1991
Abstract:
We propose a novel mechanism for isotopic exchange between CO2 and O3 via O(1D) + CO2 --> CO3* followed by CO3* --> CO2 + O(3P). A one-dimensional model calculation shows that this mechanism can account for the enrichment in 18O in the stratospheric CO2 observed by Gamo et al. [1989], using the heavy O3 profile observed by Mauersberger [1981]. The implications of this mechanism for other stratospheric species and as a source of isotopically heavy CO2 in the troposphere are briefly discussed.