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논문 기본 정보

자료유형
학술저널
저자정보
여민승 (국립순천대학교) 이지이 (이화여자대학교) 신혜정 (국립환경과학원) 남은정 (국립환경과학원) 박정민 (국립환경과학원) 박성훈 (국립순천대학교)
저널정보
한국대기환경학회 한국대기환경학회지(국문) 한국대기환경학회지 제40권 제4호
발행연도
2024.8
수록면
427 - 444 (18page)
DOI
10.5572/KOSAE.2024.40.4.427

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초록· 키워드

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The concentrations of PM<SUB>2.5</SUB>(particulate matter with an aerodynamic diameter less than or equal to 2.5 μm) components and their gaseous precursors measured during the Fine Particle Research Initiative in East Asia considering National Differences project in winter at the Seoul site were used for box modeling to investigate the characteristics of high PM2.5 concentration episodes. The measurement data showed that an ammonia-rich condition prevailed during the studied period and the secondary inorganic aerosol species, particularly ammonium nitrate, were the major contributors to the high PM2.5 concentration. A box model OCABOX (Observation Constrained Atmospheric BOX model) was used for the simulation of photochemical reactions and EKMA (Empirical Kinetic Modeling Approach) analysis. OCABOX underestimated considerably the concentration of particulate nitrate particularly during the nighttime of the high PM<SUB>2.5</SUB> period. Constraining the ozone concentration with measured data mitigated the underestimation of nighttime nitrate significantly. The model-predicted nighttime ozone concentration that was much lower than observation owing to the excessive titration by NO was pointed out to be the main reason for the serious underestimation of nocturnal nitrate formation. The EKMA analysis showed that the formations of ozone and nitrate were in the NO<SUB>x</SUB>-saturated and the transition regimes, respectively. The NO<SUB>x</SUB>-saturation characteristics of the ozone formation appeared even more severe during the high PM<SUB>2.5</SUB> episode period because the high PM<SUB>2.5</SUB> concentration was led by high NO<SUB>x</SUB> concentration. Nitrate formation did not show the NO<SUB>x</SUB>-saturation characteristics because of the underestimated nocturnal formation and the HONO constraint provided proportionally to the NOx concentration in this study. Further investigation on the effects of the method of HONO constraining on the nitrate formation sensitivity is warranted.

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

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