Journal of Environmental Science International pISSN: 1225-4517 eISSN: 2287-3503 23(2); 249~259; February 2014 http://dx.doi.org/10.5322/JESI.2014.23.2.249 ORIGINAL ARTICLE 2009년 안면도 지역 고농도 PM 2.5 특성에 관한 수치 연구 전원배 ٠이화운 1)* ٠이순환 2) ٠박재형 1) ٠김현구 3) 산대෈교 환경연원, 1) 산대෈교 ஺환경ਏ스템෈, 2) 산대෈교 ஺과෈교ଖ과, 3) 한에너஺기술연원 Numerical Study on the Characteristics of High PM 2.5 Episodes in Anmyeondo Area in 2009 Won-Bae Jeon, Hwa Woon Lee 1)* , Soon-Hwan Lee 2) , Jae-Hyeong Park 1) , Hyun-Goo Kim 3) Institute of Environment Studies, Pusan National University, Busan 609-735, Korea 1) Division of Earth Environmental System, Pusan National University, Busan 609-735, Korea 2) Department of Earth Science Education, Pusan National University, Busan 609-735, Korea 3) Korea Institute of Energy Research, Daejeon 305-343, Korea Abstract This paper investigates the characteristics of high PM2.5 episodes occurred at Anmyeondo area in spring time, 2009. The monthly mean PM2.5 concentration during April was the highest in the year and especially, high levels of PM2.5 exceeding standard regulation level were sustained consecutively during 5 to 13 April. To analyze more detailed PM2.5 characteristics, numerical simulations were carried out using CMAQ(Community Multi-scale Air Quality) with IPR(Integrated Process Rate) and DDM-3D(Decoupled Direct Method). PM2.5 level was lower in daytime than that in nighttime due to vigorous vertical mixing during daytime. The chemical composition was showed that ratio of primary ion components such as sulfate(SO4 2- ), nitrate(NO3 - ) and ammonium(NH4 + ) were nearly half of total amount of PM2.5. Aerosol and transport process dominantly contributed to PM2.5 concentration in Anmyeondo area and contribution rate of local emissions was nearly zero since Anmyeondo area has rare anthropogenic PM emission sources. DDM-3D analysis result showed that PM2.5 in Anmyeondo area was influenced by emissions from Shanghai and Shandong region of China. Key words : PM2.5, CMAQ, DDM, Coastal region 1. ছ 론 1) 세஺(Particulate Matter)는 대기 중에 존재෇ 는 대표ୡ인 କ해질로ছ, ஻경이 2.5 ஃ 초과෇는 조대଺ୀ(Coarse particle)와 2.5 ஃ이෇인 세଺ୀ (Fine particle)로 분 된다(Seinfeld 와 Pandis, 2006). 고농도의 세஺는 ਏ정 감ী, 호흡기 계통의 질 율  사 증ԧ 등의 다양한 환경제 ઉ기한다 (Dockery 와 Stone, 2007). 특히 세଺ୀ(이෇ PM2.5) 의 경우 조대଺ୀ에 비해 ଺ୀ의 크기ԧ 기 때에 대기 중의 체룺ਏ간이 길ઘ ஺의 맔사 평형에 ஻· 간୦ୡ인 ઽ향을 칠 뿐 니라, 호흡기 내로의 침చ이 용이해 호흡기  Ԩ종 심혈관계 질환을 କ릜 할 ԧ능성이 높다(Harrison 등, 2012; Lee 등, 2003; Received 17 September, 2013; Revised 22 October, 2013; Accepted 28 October, 2013 * Corresponding author : Hwa Woon Lee, Division of Earth Environ- mental System, Pusan National University, Busan 609-735, Korea Phone: +82-(0)51-510-2291 E-mail: hwlee@usan.ac.kr ⓒ The Korean Environmental Sciences Society. All rights reserved. This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http:// creativecommons.org/licenses/by-nc/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.