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Journal of the Korean Society for Environmental Analysis 2011;14(4):249-256.
Temporal and Spatial Distribution of Sulfur Dioxide in Ulsan, Korea
울산지역 대기 중 아황산가스의 시공간적 오염특성(2005-2009)
이윤세, 권혜옥, 김철수, 손희식, 예진, 최성득
울산과학기술대학교
Abstract
We investigated the temporal and spatial distribution of SO₂measured at 14 air pollution monitoring sites in Ulsan, Korea. The levels of SO₂in Ulsan have continuously decreased since the 1990s, and a recent (2005-2009) annual average concentration of 8 ppb is lower than the national guideline of 20 ppb. However, Ulsan has higher levels of SO₂than any other mega-city in Korea. The average level of SO₂at industrial sites (13.7ppb) is 2.4 times higher than those at residential and commercial sites. According to the measurement data,meteorological condition, and former air dispersion modeling results, it was confirmed that SO₂emitted from the industrial complex was transported to the residential area by sea-land breeze and southeastern seasonal winds. For the improved air quality in Ulsan, the current environmental policy permitting the use of high-sulfur oil (<4%) should be carefully evaluated. The emission of greenhouse gases and hazardous air pollutants (HAPs) as well as SO₂from plants using the high-sulfur oil should be monitored. Furthermore, separated environmental policies for the industrial and residential areas are required for more effective pollution management.
Key Words: Sulfur dioxide, SO₂, Ulsan, Air pollution
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