2017년 서울시 O₃과 PM<SUB>2.5</SUB>의 계절별 상관분석 연구

다국어 초록 (Multilingual Abstract)

To characterize the correlation between tropospheric O₃ and PM<SUB>2.5</SUB> by season, a comprehensive analysis for the interaction between tropospheric O₃ and PM<SUB>2.5</SUB> has been performed over 25 sites in Seoul in 2017. Highly positive correlation between O₃ and PM<SUB>2.5</SUB> was observed during the summer period (June, July, and August) and this is related to the simultaneous formation of O₃ and PM<SUB>2.5</SUB> due to an increase of the atmospheric oxidation ability. While, correlations of O₃ and PM<SUB>2.5</SUB> were negative in the winter period (January, February, and December), showing the opposite trend with summer. The negative correlation for O₃ and PM<SUB>2.5</SUB> in winter might be due to both aerosol-radiation interactions and the O₃ titration effect by NOx. We also found that NOx plays a more significant role to decrease O₃ concentration than PM<SUB>2.5</SUB> on a low concentration of O₃ in winter. It indicates that there are seasonal difference for the mechanisms of O₃ and PM<SUB>2.5</SUB> interaction. Therefore, it is required on a different O₃ and PM<SUB>2.5</SUB> reduction approach for each season.