Abstract
The influence of both meteorogical and chemical factors was discussed for photochemical smog generation.
Meteorogical factors involve atmospheric stability, wind direction, wind speed, temperature, humidity, weather condition, insolation intensity etc. The relations of these meteorological factors to photochemical smog emergence were surveyed, based on the field report of photochemical air pollution on Tokyo bay andOsaka bay areas.
Photochemical smog is also affected by chemical factors such as concentration or mixing ratio of NOX and hydrocarbons (HC). Concerning this problem, NOX-HC-Oxidant relation, NOX-HC-Peroxyacyl nitrate relation, NOX-HC-Carbonyl compounds relation, and reactivities of hydrocarbons, were discussed, referring many kinds of bibliography. In addition, examples of hydrocarbon concentration and NOX/HC ratio in ambient air in domestic and foreign country were shown. Finally, the effect of addition of H2O, CO, SO2 HCHC, and CH3CHO on the photochemical reaction of NOX-HC system were discussed.
