오염원 및 기상조건에 따른 울산지역의 고농도 대기오염 분포특성
Characteristics of the Distribution of High Ambient Air Pollutants with Sources and Wather Condition in Ulsan
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Abstract
Five sampling sites were selected to investigate the distribution characteristics of air pollutants with pollution sources and weather conditions in Ulsan. SO2, NO2, O3, CO, PM10 concentrations and weather conditions with time were analyzed by using several statistical methods. Also, the distribution characteristics of ambient air quality were estimated by pollution-rose and multi-regression analysis. As a result of the analysis, NO2, CO and PM10 concentrations were high in winter season, whereas SO2 and O3 concentrations were high in summer season. This concentration distribution was caused by the unfavorable geographical location, which the residential area was located at the downwind direction to industrial area. From the pollution-rose, we confirmed that each pollutant influenced the downwind residential areas because of seasonal wind direction. SO2 concentration has shown positive correlation of 0.2~0.3 for NO2, PM10 and temperature, while O3 concentration has shown negative correlation. Also, NO2 and CO concentrations, pollutants generated by combustion, have shown positive correlation, while O3 concentration and temperature have shown negative correlation. Therefore, it could be suggested that a seasonal air quality policy and a new guideline of air quality was necessary in each season with wind directions to reduce the air pollution level in Ulsan.
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