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RISS 인기검색어
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PACDEX 캠페인 자료로 분석한 블랙카본을 포함한 축적모드 에어로솔의 구름응결핵 가능성
이시혜(Sihye Lee),김영성(Young Sung Ghim),김상우(Sang-Woo Kim),윤순창(Soon-Chang Yoon) 한국대기환경학회 2010 한국대기환경학회지 Vol.26 No.4
Airborne in-situ measurements of aerosol/cloud number concentrations were analyzed to investigate the effects of aerosols on warm cloud formation in the Pacific Dust Experiment (PACDEX) during April and May 2007. In the air masses originating from the Asian continent, high concentrations of fine particles including black carbon (BC) were observed when compared to other regions. A strong correlation (r=0.88) between condensation nuclei (CN) having sizes ranging from 0.1 to 1.0 ㎜ (CN<SUB>0.1-1.0</SUB>) and cloud condensation nuclei (CCN) at 0.4% supersaturation (CCN<SUB>0.4%</SUB>) suggests that most of the CN<SUB>0.1-1.0</SUB> can contribute to cloud formation. The possibility of a cloud droplet formation by BC particles was expected at the high water vapor mixing ratio (WVMR) and the abundance of watersoluble components at the low altitude less than 3 ㎞.
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온도와 광도가 톨루엔-NO<SUB>x</SUB>-공기 혼합물의 광산화 반응에 미치는 영향의 비교
주옥정(Ok-Jung Ju),배귀남(Gwi-Nam Bae),최지은(Ji-Eun Choi),이승복(Seung-Bok Lee),김영성(Young Sung Ghim),문길주(Kil-Choo Moon),윤순창(Soon-Chang Yoon) 한국대기환경학회 2007 한국대기환경학회지 Vol.23 No.3
To differentiate temperature effect from the light intensity effect on the formation of secondary products during the photooxidation of toluene-NO<SUB>x</SUB>-air mixtures, steady-state air temperature was changed from 20℃ to 33℃ at the same light intensity of 0.39 min?¹ in an indoor smog chamber. Smog chamber consisted of 64 blacklights and a 5.8㎥ reaction bag made of Teflon film. Air temperature was controlled by an air-conditioning system. The starting time for rapid conversion of NO to NO₂ was slightly delayed with decreasing air temperature. In contrast to light intensity effect, the ozone formation time and the ozone production rate were insensitive to air temperature. Although the formation time for secondary organic aerosols was not changed, the particle number concentration increased with temperature. However, the newly formed secondary organic aerosol mass at lower temperature was higher than that at higher temperature. Since light intensity significantly affected the starting time and quantity of ozone and aerosol formation, it is considered that the temperature could contribute partly the quantity of aerosol formation during the photooxidation of toluene-NO<SUB>x</SUB>-air mixtures.
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