Characterization of spatio-temporal variations in PM2.5 in Gyeongnam (GN) province during 2015-2016 was investigated to assess the air quality in this area in terms of fine particles. Yearly mean concentrations of PM2.5 ranged from 19.1 to 29.5 μgm-3. High concentrations of PM2.5 were observed in spring (21.2-30.3 μgm-3) and winter (20.2-30.3 μgm-3). Low concentrations of PM2.5 were generally observed in fall (16.2-23.2 μgm-3). PM2.5 concentration was highest in the morning (10 AM). The fractions of PM2.5 in PM10 were 0.51-0.62 and two were significantly correlated (r=0.779-0.830), suggesting common sources (fossil fuel combustion, mobile sources, etc). CO was significantly correlated with PM2.5 in highly urbanized areas such as the city of Changwon (CW, r=0.711), compared to other air pollutants (SO2, NO2, and O3), suggesting dominance of industrial combustion sources.

Abstract
 1. 서 론
 2. 재료 및 방법
 3. 결과 및 고찰
  3.1. 시간별 PM2.5의 농도 분포
  3.2. 일·월별 PM2.5의 농도 분포
  3.3. 계절별 및 연평균 PM2.5의 농도 분포
 4. 결 론
 REFERENCES

• 손장호(동의대학교 환경공학과) | Zang-Ho Shon (Department of Environmental Engineering, Dong-Eui University) Corresponding author