In this study, the contributions of emissions (foreign and domestic) and atmospheric physical and chemical processes to PM2.5 concentrations were evaluated during a high PM2.5 episode (March 24-26, 2018) observed on the Jeju Island in the spring of 2018. These analyses were performed using the community multi-scale air quality (CMAQ) modeling system using the brute-force method and integrated process rate (IPR) analysis, respectively. The contributions of domestic emissions from South Korea (41-45%) to PM2.5 on the Jeju Island were lower than those (81-89%) of long-range transport (LRT) from China. The substantial contribution of LRT was also confirmed in conjunction with the air mass trajectory analysis, indicating that the frequency of airflow from China (58-62% of all trajectories) was higher than from other regions (28-32%) (e.g., South Korea). These results imply that compared to domestic emissions, emissions from China have a stronger impact than domestic emissions on the high PM2.5 concentrations in the study area. From the IPR analysis, horizontal transport contributed substantially to PM2.5 concentrations were dominant in most of the areas of the Jeju Island during the high PM2.5 episode, while the aerosol process and vertical transport in the southern areas largely contributed to higher PM2.5 concentrations.

Abstract
1. 서 론
2. 재료 및 방법
    2.1. 대상지역, 자료 및 연구 방법
    2.2. 모델 구성 및 입력자료
3. 결과 및 고찰
    3.1. 고농도 사례일의 PM2.5 농도 특성 분석
    3.2. PM2.5 농도에 대한 국내외 배출량 기여도 분석
    3.3. PM2.5 농도에 대한 물리·화학적 공정 기여도 분석
4. 결 론
감사의 글
REFERENCES

• 백주열(제주대학교 지구해양융합학부 지구해양전공) | Joo-Yeol Baek (Faculty of Earth and Marine Convergence/Earth and Marine Science Major, Jeju National University, Jeju 63243, Korea)
• 송상근(제주대학교 지구해양융합학부 지구해양전공, 제주대학교 지구해양과학과) | Sang-Keun Song (Faculty of Earth and Marine Convergence/Earth and Marine Science Major, Jeju National University,Department of Earth and Marine Sciences, Jeju National University) Corresponding author
• 한승범(국립기상과학원 관측연구부) | Seung-Beom Han (Observation Research Department, National Institute of Meteorological Sciences, Jeju 63568, Korea)
• 조성빈(제주대학교 지구해양융합학부 지구해양전공) | Seong-Bin Cho (Faculty of Earth and Marine Convergence/Earth and Marine Science Major, Jeju National University, Jeju 63243, Korea)