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NTIS 바로가기한국대기환경학회지 = Journal of Korean Society for Atmospheric Environment, v.31 no.1, 2015년, pp.28 - 40
김효선 (충남대학교 환경공학과) , 정진상 (한국표준과학연구원 대기환경표준센터) , 이진홍 (충남대학교 환경공학과) , 이상일 (한국표준과학연구원 대기환경표준센터)
To investigate the seasonal variations of carbonaceous aerosol in Daejeon, OC (organic carbon), EC (elemental carbon) and WSOC (water soluble organic carbon) in
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핵심어 | 질문 | 논문에서 추출한 답변 |
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PM2.5는 유기탄소(OC)와 원소탄소(EC)로 구분되는데, 각각 어떻게 생성되는가? | , 1996). EC는 태양광을 흡수하여 기후 온난화에 기여도가 높고(Ramanathan and Carmichael, 2008; Menon et al., 2002), 화석연료(디젤자동차 등)와 생체소각(biomass-burning)으로부터 대기 중으로 직접배출(1차 배출)된다. 반면, OC는 화석연료의 연소 등에 의해 직접 배출될 뿐만 아니라 대기 중 휘발성유기화합물(Volatile organic compounds, VOCs)의 광화학 반응으로부터 생성되는 낮은 증기압의 생성물이 응축되는 과정에 의해 생성 된다(Secondary OC) (Seinfeld and Pandis, 2012). OC는 다시 수용성 유기탄소(WSOC)와 비수용성 유기탄소(Water insoluble organic carbon, WISOC)로 나눌 수 있다. | |
초미세먼지(PM2.5)는 무엇인가? | 대기 중 초미세먼지(PM2.5, 공기역학적 직경이 2.5μm 이하인 입자상 물질)는 인체에 호흡기 및 심혈관질환에 영향을 주며, 사망률 증가와도 밀접한 연관이 있는 것으로 밝혀졌다. 또한 미세먼지는 시정장애를 발생키는 것으로 알려져 있으며(EPA, 2009; Laden et al. | |
미세먼지가 야기하는 문제는? | 5μm 이하인 입자상 물질)는 인체에 호흡기 및 심혈관질환에 영향을 주며, 사망률 증가와도 밀접한 연관이 있는 것으로 밝혀졌다. 또한 미세먼지는 시정장애를 발생키는 것으로 알려져 있으며(EPA, 2009; Laden et al., 2006; Pope et al., 2006; Slaughter et al., 2004), 태양복사에너지를 산란하고 흡수하여 지구-대기시스템의 복사균형을 바꾸어 기후변화를 직접적으로 야기하거나 구름 응결핵으로 구름을 형성하는 등 간접적인 기후변화를 야기한다(Jacob and Winner, 2009; IPCC, 2007; Lohmann and Feichter, 2005; Kaufman et al., 2002). |
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