ISSN:
1420-9136
Keywords:
1-D model
;
Ozone perturbation
;
Photochemistry
;
Sensitivity
Source:
Springer Online Journal Archives 1860-2000
Topics:
Geosciences
,
Physics
Notes:
Abstract With the aid of a one-dimensional steady-state, stratospheric model we have calculated ozone changes coused by atmosphric injections of NOx, N2O and chlorofluoromethanes. Adopting the fast rate constant, for the reaction HO2+NO»OH+NO2 measured by Howard and Evenson, we calculate much smaller perturbations of the ozone layer by NOx and N2O additions than previously estimated, but about two times larger ozone reductions as a result of continued emissions of chlorofluoromethanes, CF2Cl2 and CFCl3. The model results are sensitive to adopted values for the rate coefficients for the reactions HO2+O3»OH+2O2 and OH+HO2»H2O+O2 and the eddy diffusion profile near the tropopause. More accurate assessments of ozone perturbations require the development of photochemical models that incorporate meteorological processes in more than one dimension.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01636903
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