Temporal and Spatial Pollution Characteristics of Ambient Criteria Pollutants in Metropolitan and Industrial Cities of Daegu-Gyeongbuk Area

대구-경북지역 광역대도시와 산업도시 환경기준 대기오염물질의 시간적 및 공간적 오염도 특성

  • Lee, Hyun-Cheol (Corporation of Global Environment) ;
  • Jo, Wan-Kuen (Department of Environmental Engineering, Kyungpook National University) ;
  • Kim, Jong-Tae (Department of Environmental Engineering, Kyungpook National University)
  • Published : 2007.12.31

Abstract

This study considers the characteristics of nitrogen dioxide ($NO_2$), ozone ($NO_3$) and sulfur dioxide ($SO_2$) in three cities of Daegu-Gyeongbuk Area (Daegu, Pohang, and Gumi), which have different city or industrial characteristics, over a time period of 2 years. The diurnal, weekly, monthly and seasonal concentration variations of criteria air pollutants were attributed to compounds or city types. However, the seasonal variations of $O_3$ concentrations were dependent on compounds, but not on city types. Lower $O_3$ concentrations were observed in July when comparing with other summer months. For $SO_2$ and $NO_2$, the concentrations were higher in Daegu when compared to Pohang and Gumi, while the concentrations of $O_3$ were higher in Pohang and Gumi. $SO_2$ exhibited higher levels in the morning hours, while $O_3\;and\;NO_2$ exhibited higher levels in the afternoon hours for all cities. For $O_3$, the concentrations observed during Sunday were higher than those of other week or weekend days. Furthermore, the monthly and seasonal concentration variations of air pollutants depended on compounds or city types. It if noteworthy that the current monthly and seasonal variations were consistent with several prey ious studies.

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References

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