Comparing to the other air pollutants like SO2, CO, the number of exceedance of the ozone national ambient air quality standard(NAAQS) and the ozone warning increased recently in Busan. The purpose of this study is to find out the preliminary symptoms for high ozone days in Busan area. In order to find out the preliminary symptoms, the hourly ozone data at air quality monitoring stations and the hourly meterological parameters at Busan regional meteorological 2007 to 2013 were used for the analysis. Averaged daily max ozone concentration was the highest(0.055 ppm) at Noksan and Youngsuri in the ozone season from 2007 to 2013. The horizontal distributions of daily max. ozone including all stations in Busan at high ozone days(the day exceeding 0.1 ppm of ozone concentration at least one station) were classified from two to five clusters by hierarchial cluster analysis. The meteorological variables showing strong correlation with daily max. ozone were the daily mean dew point temperature, averaged total insolation, the daily mean relative humidity and the daily mean cloud amount. And the most frequent levels were 19-23℃ in dew point temperature, 21-24 MJ/m2 in total insolation on the day before, 2.6-3.0 MJ/m2 on the very day, 67-80% in relative humidity and 0-3 in cloud amount.

Abstract
 1. 서 론
 2. 연구방법
  2.1. 대기오염 및 기상자료
  2.2. 군집분석
 3. 결과 및 고찰
  3.1. 일 최고 오존농도 분포
  3.2. 오존측정소 권역설정
  3.3. 선행 기상조건 분석
 4. 결론 및 제언
 REFERENCE

• 도우곤(부산광역시 보건환경연구원) | Woo-Gon Do (Busan Metropolitan City Institute of Health and Environment)
• 정우식(인제대학교 대기환경정보공학과/대기환경정보연구센터) | Woo-Sik Jung (Department of Atmospheric Environment Information Engineering, Atmospheric Environment Information Research Center, Inje University) Corresponding author