Correlation between Light Intensity and Ozone Formation for Photochemical Smog in Urban Air of Seoul
- Correlation between Light Intensity and Ozone Formation for Photochemical Smog in Urban Air of Seoul
- 이승복; 배귀남; 이영미; 문길주; 최만수
- ozone production rate; light intensity; photooxidation; twin smog chambers; urban air
- Issue Date
- AEROSOL AND AIR QUALITY RESEARCH
- VOL 10, NO 6, 540-549
- Urban residents are exposed to high levels of ozone that are produced by photochemical reactions of ambient air in
strong sunlight. The potential for ozone formation of urban air needs to be characterized in order to avoid exposure to
unexpectedly high ozone concentrations during the daytime. In this study, ten sets of twin smog chamber experiments
were carried out to determine the correlation between light intensity and ozone formation during photochemical reactions
of urban air in Seoul. Single chamber analysis revealed a higher rate of ozone production under higher irradiation than
under less intense irradiation under similar initial ambient air conditions. However, the rate of ozone production showed
significant variations at the same light intensity. Here, the ratio of two light intensities for both chambers was introduced
as a key parameter. The ratio of ozone production was dependent on the ratio of the two light intensities according to a
power function with a factor of approximately 1.8. The proposed correlation was used to predict the daytime ozone
concentration for calm, clear and dry weather conditions.
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