Air Chemistry and Dispersion
The measures to be taken depend upon the scale on which they should be most effective (local ozone reduction versus large-scale reductions), and upon the type of effect required (elimination of very high peak concentrations of short duration; reduction of long-term averages; reduction of a specific photochemical oxidant, e. g., peroxyacetyl nitrate).
Justification of measures imposed upon the emitters of specific precursors is extremely difficult, and presupposes long-term field measurements of oxidants, precursors, and meteorological parameters.
Beneficial effects which are expected from measures taken against specific precursors cannot, at present, be quantitatively predicted. It is equally difficult, after such measures have been taken, to obtain irrefutable proof of the effect, owing to the year-to-year variability of meteorological parameters (Schurath 1979b).
KeywordsOzone Concentration Deposition Velocity Solar Zenith Angle Bimolecular Reaction Ozone Formation
Unable to display preview. Download preview PDF.