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자료유형
학술저널
저자정보
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한국대기환경학회 한국대기환경학회지(국문) 한국대기환경학회지 제19권 제6호
발행연도
2003.12
수록면
647 - 661 (15page)

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For continuous monitoring of atmospheric visibility in the city of Kwangju, Korea, a transmissometer system consisting of a transmitter and a receiver was installed at a distance of 1.91 km across the downtown Kwangju. At the transmitter site an integrating nephelometer and an aethalometer were also installed to measure the scattering and absorption coefficients of the atmosphere, respectively. At the receiver site, an URG PM2.5 cyclone sampler and an URG-VAPS (Versatile Air Pollutant Sampler) with three filter packs and two denuders were used to collect both PM2.5 and PM10 samples at a 2-hour or 12-hour sampling interval for aerosol chemical analysis. Sulfate, organic mass by carbon (OMC), nitrate, elemental carbon (EC) components of fine aerosol were the major contributors to visibility impairment. Diurnal variation of visibility during best-case days showed rapid improvement in the morning hours, while it was delayed until afternoon during the worst-case days. Aerosol mass concentration of each aerosol component for the worst-case was calculated to be 11.2 times larger than the best-case for (NH4)2SO4(NHSO), 19.0 times for NH4NO3(NHNO), 2.2 times for OMC, respectively. Also result shows that elemental carbon and fine soil (FS) were 3.7 and 2.2 times more than those of best-case, respectively. Sum of total contributions of wet NHSO and NHNO to light extinction was calculated to be 301 Mm-1 for the worst-case. However, sum of contributions by dry NHSO and NHNO was calculated to be 123 Mm-1 for the best case. Mass extinction efficiencies of fine and coarse particles were calculated to be 5.8±0.3 ㎡/g and 1.8±0.1 ㎡/g, respectively.

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Abstract

1. 서론

2. 측정 및 분석 방법

3. 결과 및 고찰

4. 결론

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UCI(KEPA) : I410-ECN-0101-2009-539-013737849