This research investigated the characteristics of fine particles during cold front passage in Busan, on March 19, 2020. The cold front speed was 17.4 m/s (about 63k km/hr), moving from the northwest to the southeast, and with a width of about 64 km. The backward trajectory analysis showed that a southern sea air parcel flowed into Busan before the cold front passage, carrying continental materials from China transported into Busan after cold front passage. The PM10 concentration in Busan showed a rapid increase after passing through the cold front, with PM2.5 showing a high concentration during cold front passage. The PM2.5/PM10 ratio was 0.10 - 0.30. When the cold front passed, SO4 2-, NO3 -, Ca2+, NH4 +, Na+, and K+ in PM2.5 showed a rapid increase, with SO4 2- showing the most significant increase. These results indicated that understanding the characteristics of fine particles during cold front passage in Busan could provide insight into establishing a strategy to control urban air quality.

Abstract
1. 서 론
2. 자료 및 방법
3. 결과 및 고찰
    3.1. 부산지역 2020년 3월 19일 한랭전선 통과 시의 기상특성
    3.2. 부산지역 2020년 3월 19일 한랭전선 통과 시 미세먼지 농도 특성
    3.3. 부산지역 2020년 3월 19일 한랭전선 통과 시PM2.5 중의 성분농도 특성
4. 결 론
REFERENCES

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