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논문 기본 정보

자료유형
학술저널
저자정보
문정호 (한국표준과학연구원) Jayant Nirmalkar (한국표준과학연구원) 황태경 (국립환경과학원) 김대곤 (국립환경과학원) 양재환 (충남대학교) 정진상 (한국표준과학연구원)
저널정보
한국대기환경학회 한국대기환경학회지(국문) 한국대기환경학회지 제38권 제5호
발행연도
2022.10
수록면
702 - 715 (14page)
DOI
10.5572/KOSAE.2022.38.5.702

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초록· 키워드

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The visibility impairment caused by air pollutants and aerosol water is a major environmental problem in our society. This research investigates the impacts of chemical composition of PM<SUB>2.5</SUB> and aerosol water on visibility impairment in Daejeon, Korea between 2014 and 2020. Light scattering and absorption coefficients were measured by a nephelometer and an aethalometer, respectively whereas light extinction coefficient was calculated from PM<SUB>2.5</SUB> chemical composition and relative humidity (RH) using the IMPROVE algorithm. Good agreement of light extinction coefficients was observed between measured and calculated ones with a slope of 0.99 and R² of 0.95. Decreases in annual average concentrations of (NH₄)₂SO₄, organic mass (OM), elemental carbon (EC), and sea-salt (SS) were observed in 2020 comparing to those in 2014 whereas NH₄NO₃ was increased. During the period of poor visibility (Worst 20%), light extinction coefficient decreased 16.9% in 2020 compared to that in 2014, resulted in 23.2% increase in visibility. The contribution to the total light extinction coefficient decreased from 34.4% (2014) to 22.6% (2020) for (NH₄)₂SO₄ and from 18.0% (2014) to 10.8% (2020) for OM whereas increased from 36.8% (2014) to 59.9% (2020) for NH₄NO₃. During the Worst 20% visibility period, the contribution of aerosol water to the total light extinction coefficient increased from 48.4% in 2014 to 53.5% in 2020, indicating that aerosol water is important contributor to visibility impairment. This research indicates that reducing NH₄NO₃ was a significant factor in the deterioration of visibility.

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Abstract
1. 서론
2. 연구 방법
3. 결과 및 고찰
4. 결론
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