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자료유형
학술저널
저자정보
배민아 (아주대학교) 김순태 (아주대학교)
저널정보
한국대기환경학회 한국대기환경학회지(국문) 한국대기환경학회지 제38권 제4호
발행연도
2022.8
수록면
624 - 636 (13page)
DOI
10.5572/KOSAE.2022.38.4.624

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In this study, we estimated the foreign emission impact on PM<SUB>2.5</SUB> concentration in South Korea using Weather Research and Forecasting (WRF)-Community Multiscale Air Quality (CMAQ) modeling with a set of bottom-up emissions inventories over Northeast Asia during 2019. PM<SUB>2.5</SUB> foreign impact based on the emissions inventory was estimated to 12.7μg/m³ for the study period. However, when compared to the PM<SUB>2.5</SUB> observations in China, simulated PM<SUB>2.5</SUB> concentration for the period was overestimated by about 10 μg/m³ (24%) during 2019. When adjusted with ratios of monthly mean observed to simulated concentrations over the upwind region, the period mean foreign impact was lowered by 2.6 μg/m³. The relative foreign impacts in South Korea before and after the adjustment was 54% and 43%, respectively. On the other hand, the bias between observed and simulated PM<SUB>2.5</SUB> concentrations in South Korea has increased from 0.1 μg/m³ before foreign contribution adjustment to -2.5 μg/m³ after the adjustment. This indicates that additional domestic emissions are necessary to explain the lack of PM<SUB>2.5</SUB> self-contribution (2.5 μg/m³). After the adjustment, the biases between the observations and simulated concentrations for seventeen provinces ranged from -10.5 to 24.5 μg/m³. This result represents that accuracy of provincial level emissions should be guaranteed when future direction on the sub-regional air quality managements in South Korea to lower the ambient concentration of the secondary air pollutant is considered. Overall, this study exhibits that uncertainties in foreign contributions need to be better understood prior to estimation of uncertainties embedded in domestic emissions in South Korea to weigh the importance of PM<SUB>2.5</SUB> transboundary impact.

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Abstract
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2. 방법론
3. 결과
4. 결론
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