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자료유형
학술저널
저자정보
박승식 (전남대학교)
저널정보
한국대기환경학회 한국대기환경학회지(국문) 한국대기환경학회지 제38권 제5호
발행연도
2022.10
수록면
641 - 652 (12page)
DOI
10.5572/KOSAE.2022.38.5.641

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In this study, size-resolved measurements of ambient particulate matter (PM) were conducted during late fall at an urban site in Gwangju, Korea, to examine change in accumulation mode size distributions of the ambient PM. The size distributions of ambient PM and its secondary inorganic species were classified into two groups based on the PM<SUB>2.5</SUB>/PM<SUB>10</SUB> observed at an air pollution monitoring station close to the study site. Measurement period corresponding to the first group (PM<SUB>2.5</SUB>/PM<SUB>10</SUB><0.5) was characterized by both stable air patterns (e.g., weak wind speeds (<1.0 m/s) and high relative humidity (RH) (59~83%) and predominance of local influence. On the other side, the second group (PM<SUB>2.5</SUB>/PM<SUB>10</SUB>>0.6) was also characterized by the stable weather patterns such as weak wind speeds, very high RH (72~93%), and low temperature, but affected by the local influences and external influences from long-range transports. For the first group, ambient PM and its secondary inorganic components (NO₃<SUP>-</SUP>, SO₄<SUP>2-</SUP>, and NH₄<SUP>+</SUP>) showed bi-modal size distributions, with predominance of condensation mode peaking at 0.32 μm, suggesting they may have been formed through by homogeneous gas-phase reaction followed by condensation on preexisting particles. For the second group, they exhibited also bi-modal size distributions with very prominent droplet modes peaking at 0.55~1.0 μm, suggesting that the RH and long-range transportation of aerosol particles may have played an important role in shaping their size distributions of droplet mode. These changes in the size distributions during the second group period resulted in increases in PM<SUB>2.5</SUB>/PM<SUB>10</SUB>.

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