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논문 기본 정보

자료유형
학술저널
저자정보
박승식 (전남대학교) 유근혜 (전남대학교) 이상일 (한국표준과학연구원) 배민석 (국립목포대학교)
저널정보
한국대기환경학회 한국대기환경학회지(국문) 한국대기환경학회지 제34권 제5호
발행연도
2018.10
수록면
727 - 734 (8page)
DOI
10.5572/KOSAE.2018.34.5.727

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초록· 키워드

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In this study, real-time absorption coefficients of carbonaceous species in PM<SUB>2.5</SUB> was observed using a dual-spot 7-wavelength Aethalometer between November 1, 2016 and December 31, 2017 at an urban site of Gwangju. In addition, 24-hr integrated PM<SUB>2.5</SUB> samples were simultaneously collected at the same site and analyzed for organic carbon and elemental carbon (OC and EC) using the thermal-optical transmittance protocol. A main objective of this study was to estimate mass absorption cross section (MAC) values of black carbon (BC) particles at the study site using the linear regression between aethalometer-based absorption coefficient and filter-based EC concentration. BC particles observed at 880 nm is mainly emitted from combustion of fossil fuels, and their concentration is typically reported as equivalent BC concentration (eBC). eBC concentration calculated using MAC value of 7.77 ㎡/g at wavelength of 880 nm, which was proposed by a manufacturer, ranged from 0.3 to 7.4 μg/㎥ with an average value of 1.9±1.2 μg/㎥, accounting for 7.3% (1.5~20.9%) of PM<SUB>2.5</SUB>. The relationship between aerosol absorption coefficients at 880 nm and EC concentrations provided BC MAC value of 15.2 ㎡/g, ranging from 11.4 to 16.2 ㎡/g. The eBC concentrations calculated using the estimated MAC of 15.2 ㎡/g were significantly lower than those reported originally from aethalometer, and ranged from 0.2 to 3.8 μg/㎥, with an average of 1.0±0.6 μg/m3, accounting for 3.7% of PM<SUB>2.5</SUB> (0.8~10.7%). Result from this study suggests that if the MAC value recommended by the manufacturer is applied to calculate the equivalent BC concentration and radiative forcing due to BC absorption, they would result in significant errors, implying investigation of an unique MAC value of BC particles at a study site.

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

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UCI(KEPA) : I410-ECN-0101-2019-539-000042927