The study investigates the characteristics of PM10 concentration in Guducsan air quality observatory and in particular, analyzes the relationship between sudden increase of PM10 concentration in the morning of spring 2014 and meteorological parameters. PM10 concentration in April was 46.9 ㎍/㎥, the highest, followed by 45.5 ㎍/㎥ and 44.6 ㎍/㎥ in March and May, and 21.9 ㎍/㎥ in August. The low concentration in the early morning appeared on 0800 LST in spring, summer, and fall, whereas it emerged on 0900 LST in winter. High concentration in daytime lasted from 1200 LST to 1500 LST in spring and fall, whereas it continued from 1300 LST to 1600 LST in winter. The findings of PM10 concentration and change of meteorological parameters in Guducsan from April 20th to 27th in 2014 are as follows. The low concentration at dawn and in the morning decreased due to strong land breeze. Also, the sudden increase of PM10 concentration in the morning was attributable to low wind speed. Lastly, the sudden decrease of PM10 concentration in the afternoon was attributed to diffusion by strong sea breeze.

Abstract
 1. 서 론
 2. 자료 및 방법
 3. 결과 및 고찰
  3.1. 미세먼지농도의 연변화 및 월변화 특성
  3.2. PM10 농도의 일변화 특성
  3.3. 2014년 봄철 오전 중 미세먼지 농도 급상승에 대한사례연구
 4. 요약 및 결론
 REFERENCE

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