The objectives of this study were to measure ambient total gaseous mercury (TGM) concentrations in Seoul, to analyze the characteristics of TGM concentration, and to identify of possible source areas for TGM using back-trajectory based hybrid receptor models like PSCF (Potential Source Contribution Function) and RTWC (Residence Time Weighted Concentration). Ambient TGM concentrations were measured at the roof of Graduate School of Public Health building in Seoul for a period of January to October 2004.
Average TGM concentration was 3.43±1.17 ng/㎥. TGM had no notable pattern according to season and meteorological phenomena such as rainfall, Asian dust, relative humidity and so on. Hybrid receptor models incorporating backward trajectories including potential source contribution function (PSCF) and residence time weighted concentration (RTWC) were performed to identify source areas of TGM. Before hybrid receptor models were applied for TGM, we analysed sensitivities of starting height for HYSPLIT model and critical value for PSCF. According to result of sensitivity analysis, trajectories were calculated an arrival height of 1000 m was used at the receptor location and PSCF was applied using average concentration as criterion value for TGM. Using PSCF and RTWC, central and eastern Chinese industrial areas and the west coast of Korea were determined as important source areas. Statistical analysis between TGM and GEIA grided emission bolsters the evidence that these models could be effective tools to identify possible source area and source contribution.

Abstract
 1. 서 론
 2. 자료 및 방법
  2.1. 총 가스상 수은 농도 분석
  2.2. 모델 개요
  2.3. 혼합 모델 적용
 3. 결과 및 고찰
  3.1. 임계변수에 따른 민감도 분석
  3.2. 혼합 모델의 결과
  3.3. 배출량과의 통계적 분석 결과
 4. 결 론
 참 고 문 헌

• 이용미(국립환경과학원 기후대기연구부 대기공학연구과) | Yong-Mi Lee (Air Pollution Control Research Division, Climate and Air Quality Research, National Institute of Environmental Research)
• 홍지형(국립환경과학원 기후대기연구부 대기공학연구과) | Ji-Hyoung Hong (Air Pollution Control Research Division, Climate and Air Quality Research, National Institute of Environmental Research)
• 이석조(국립환경과학원 기후대기연구부 대기공학연구과) | Suk-Jo Lee (Air Pollution Control Research Division, Climate and Air Quality Research, National Institute of Environmental Research)
• 유철(국립환경과학원 기후대기연구부 대기공학연구과) | Chul Yoo (Air Pollution Control Research Division, Climate and Air Quality Research, National Institute of Environmental Research) Corresponding Author
• 이승묵(서울대학교 보건대학원 환경보건학과) | Seung-Muk Yi (Department of Environment and Public Health, Seoul National University)
• 허종배(서울대학교 보건대학원 환경보건학과) | Jong-Bae Heo (Department of Environment and Public Health, Seoul National University)