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자료유형
학술저널
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한국대기환경학회 한국대기환경학회지(국문) 한국대기환경학회지 제22권 제6호
발행연도
2006.12
수록면
863 - 875 (13page)

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Intensive visibility monitoring was conducted to investigate physical and chemical characteristics of visibility impairment by airborne pollen. Light attenuation coefficients were optically measured by a transmissometer, a nephelometer, and an aethalometer. Elemental, ionic, and carbonaceous species were chemically analyzed on the filters collected by PM<SUB>2.5</SUB> and PM₁? samplers. Aerosol size distribution was analyzed using a cascade impactor during airborne pollen period. Airborne pollen count was calculated using a scanning electron microscope. Airborne pollen was emitted into the atmosphere in springtime and further degraded visibility through its scattering and absorbing the light. Average light extinction coefficient was measured to be 211±36 Mm?¹ when airborne pollen was not observed. But it increased to 459±267Mm?¹ during the airborne pollen period due to increase of average PM<SUB>2.5</SUB> and PM₁? mass concentration and relative humidity and airborne pollen count concentration for PM₁?, which were measured to be 46.5±29.1 ㎍ m?³, 97.0±41.7 ㎍, 54.1±11.6%, and 68.2±89.7 m?³, respectively. Average light extinction efficiencies for PM<SUB>2.5</SUB> and PM₁? were calculated to be 5.9±0.9 and 4.5±0.8 ㎡ g?¹ during the airborne pollen period. Light extinction efficiency for PM₁? increased further than that for PM㎡ . The average light extinction budget by airborne pollen was estimated to be about 24% out of the average measured light extinction coefficient during the airborne pollen period.

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Abstract
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2. 측정 및 분석 방법
3. 결과 및 고찰
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