某工业区夏季环境空气质量变化的小波分析  

Air quality variation analysis using wavelet at an industry zone during the summer

作　　者：裘季冰[1] 魏海萍[2] 黄嵘[2] 潘飞飞[3] 王歆文[2] 

机构地区：[1]上海市环境科学研究院,上海200233 [2]上海市环境监测中心,上海200030 [3]上海市宝山区环境监测站,上海200940

出　　处：《环境污染与防治》2008年第2期53-58,63,共7页Environmental Pollution & Control

摘　　要：小波分析可以分解出时-频信号,因此适用于对时变信号的局部分析。基于此,小波分析已在包括环境科学等多个领域中得到广泛应用。运用Daubenchies小波,对某工业区2002年和2004年夏季环境空气中SO2浓度进行了分析。结果表明,引起该工业区2004年夏季SO2浓度上升的主导因素是大范围时空尺度环境空气质量的变化;而该工业区内部局地污染源的污染贡献率下降,表明其环境综合整治取得了成效。The wavelet analysis has been widely used due to its advantage on decomposing the time-frequency signal. The Daubenchies wavelet was adopted to analyze the fluctuating SO2 concentrations in an industry zone for 2 years. The results showed two major factors influenced the testing： higher SO2 concentrations during the summer of 2004 and variations of air quality in large areas. However, the contaminants produced by local sources declined. Thus, the environmental renovations in the industry zone have proven to be effective.

关 键 词：小波分析 时-频信号 环境空气质量 工业区 

分 类 号：X51[环境科学与工程—环境工程]