| Trends of urban air pollution in Zhengzhou City in 1996–2008 |
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| 作者单位： | [1]Institute of Geographic Sciences and Natural Resources Research, Chinese Academy Sciences, Beoing 100101, China,＂ [2]Graduate University of Chinese Academy of Sciences, Beijing 100049, China, [3]The Second Battalion ofNon-ferrous Metal Geology and Mineral Resources Bureau, Zhengzhou 450016, China [4]Institute ofNatural Resources and Environmental Science, Henan University, Kaifeng 475004, China） |
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| 基金项目： | Foundation item： Under the auspices of National Natural Science Foundation of China （No. 41071063） |
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| 摘 要： | Urban air pollution is a commonly concerned environmental problem in the world.Identification of air quality trend using long-term monitoring data is helpful to understand the effectiveness of pollution control strategies.This study,using data from six monitoring stations in Zhengzhou City,analyzed the changing trend in concentrations of SO 2,NO x /NO 2 and TSP/PM 10 in 1996-2008,based on non-parametric Mann-Kendall test and Sen’s slope estimator,and evaluated the comprehensive air pollution level using Multi-Pollutant Index(MPI).It was found that the concentration of each pollutant exceeded obviously the World Health Organization(WHO) guideline value,but the changing trend varied:SO 2 and NO 2 were significantly increased mainly due to an increase in coal consumption and vehicle number,while NO x,TSP and PM 10 decreased.The air pollution was serious,and differed markedly among the three functional regions:it is the most severe in the Industrial and Residential Area(IRA),followed by the Transportation Hub and Business District(THBD),and then the High-tech,Cultural and Educational Area(HCEA).Different from NO 2 concentration that had a similar change trend/rate among the function regions,the change rate of PM 10 concentration differed spatially,decreased much more obviously in THBD than other two regions.For the whole city,the comprehensive air pollution level declined gradually,illustrating that the air quality in Zhengzhou was improved in the last decade.
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| 关 键 词： | urban air pollution Mann-Kendall test Sen’s method Multi-Pollutant Index(MPI) Zhengzhou |
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