This research investigated the meteorologically relevant characteristics of high PM2.5 episodes in Busan. The number of days when daily mean PM10 concentration exceeded 100 ㎍/m3 and the PM2.5 concentration exceeded 50 ㎍/m3 over the last four years in Busan were 24 and 58, respectively. Haze occurrence frequency was 37.6% in winter, 27.4% in spring, 18.6% in fall, and 16.4% in summer. Asian dust occurrence frequency was 81.8% in spring, 9.1% in fall and winter, and 0% in summer. During summer in Busan, high PM2.5 episode occurred under the following meteorological conditions. 1) Daytime sea breeze. 2) Mist and haze present throuout the day. 3) Anti-cyclone located around the Korean peninsula. 4) Stable layer formed in the lower atmosphere. 5) Air parcel reached Busan by local transport rather than by long-range transport. These results indicate that understanding the meteorological relevance of high PM2.5 episodes could provide insight for establishing a strategy to control urban air quality.

Abstract
1. 서 론
2. 재료 및 방법
3. 결과 및 고찰
    3.1. 부산지역 고농도 미세먼지 발생 현황
    3.2. 부산지역 기상현상별 고농도 미세먼지 발생 특성
    3.3. 부산지역 여름철 고농도 PM2.5 발생 사례와 기상학적 관련성
4. 요약 및 결론
REFERENCES

• 전병일(신라대학교 화학공학과) | Byung-Il Jeon (Department of Chemical Engineering, Silla University) Corresponding author