지상 대기질 측정 자료를 이용한 서울 지역 2차 미세먼지 생성량 및 그 일변화 추정

Abstract

In an effort to estimate secondary concentrations and their diurnal variations at different photochemical activities, , CO, and concentrations obtained from the ambient air quality network located in Seoul are analyzed for the period from 2000 to 2005. In order to classify the photochemical activities on a daily basis, measured (maximum -minimum ) and which represents accumulated daily insolation, were used to classify each day into three regimes: 1) low photochemical reactivity; , and , 2) moderate photochemical reactivity; , and , and 3) high photochemical reactivity; >, and . The ratio of (/CO) obtained at low photochemical activity regime was used as an index of tracer for the estimation of secondary at higher photochemical activity regimes. The results show that the estimated secondary concentrations for moderate and high photochemical regimes are found to be 18.8% (), and 35.0% (), respectively. Diurnal variation of secondary for the moderate photochemical regime shows weak but noticeable patterns. However, the highly activated photochemical regime shows strong diurnal variations of secondary concentrations with the maximum value of at 1300LST.