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

Estimation of Secondary PM10 Concentrations and Their Diurnal Variations Using Air Quality Monitoring Data in Seoul

  • 김지아 (부산대학교 지구환경시스템학부 대기환경과학) ;
  • 진형아 (환경부 낙동강유역환경청 대기분석과) ;
  • 김철희 (부산대학교 지구환경시스템학부 대기환경과학)
  • Kim, Ji-A (Division of Earth Environmental System, Pusan National University) ;
  • Jin, Hyung-Ah (Nakdong River Basin Environmental Office) ;
  • Kim, Cheol-Hee (Division of Earth Environmental System, Pusan National University)
  • 발행 : 2008.08.31

초록

In an effort to estimate secondary $PM_{10}$ concentrations and their diurnal variations at different photochemical activities, $PM_{10}$, CO, and $O_3$ 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 ${\Delta}O_{3,\;max-min}$ (maximum $O_3$-minimum $O_3$) and ${\int}(hv)dt$ which represents accumulated daily insolation, were used to classify each day into three regimes: 1) low photochemical reactivity; ${\Delta}O_{3,\;max-min}\;{\leq}\;40\;ppb$, and ${\int}(hv)dt\;{\leq}\;4000\;W/m^2$, 2) moderate photochemical reactivity; $40\;ppb\;<\;{\Delta}O_{3,\;max-min}\;{\leq}\;60\;ppb$, and $4000\;{\leq}\;{\int}(hv)de\;{\leq}\;6000\;W/m^2$, and 3) high photochemical reactivity; ${\Delta}O_{3,\;max-min}\;>\;60\;ppb$, and ${\int}(hv)dt\;{\geq}\;6000\;W/m^2$. The ratio of ($PM_{10}$/CO) obtained at low photochemical activity regime was used as an index of tracer for the estimation of secondary $PM_{10}$ at higher photochemical activity regimes. The results show that the estimated secondary $PM_{10}$ concentrations for moderate and high photochemical regimes are found to be 18.8% ($10.9\;{\mu}g/m^3$), and 35.0% ($26.2\;{\mu}g/m^3$), respectively. Diurnal variation of secondary $PM_{10}$ for the moderate photochemical regime shows weak but noticeable patterns. However, the highly activated photochemical regime shows strong diurnal variations of secondary $PM_{10}$ concentrations with the maximum value of $35.1\;{\mu}g/m^3$ at 1300LST.

키워드

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