重庆市北碚区SO_2、NO_2变化趋势及影响因素分析研究

Analysis of Variation Trend and Influential Factors of SO_2 and NO_2 in Beibei District of Chongqing

采用2006年-2013年大气自动监测站实时发布的数据,研究分析了SO2与NO2的时间变化规律以及气象影响因素的相关性分析。结果表明,空气质量年均值均低于GB 3095-2012中的Ⅱ级标准;SO2浓度年均值2013年较2006年低45.8%,下降显著,NO2浓度年均值2013年较2006年低5.9%,下降不明显;春冬季空气质量差、夏秋季空气质量好;SO2、NO2月均值峰值分别出现在2007年11月和2009年3月;相对于SO2浓度更易受到近地面气象因子平均温度的影响而积累或扩散,而NO2浓度更易受到近地面气象因子平均相对湿度的影响而积累或扩散。

The paper analyzed the variation trend and relativity of SO2 and NO2from Beibei national control sites according to utilizing real- time date obtained from 2006 to 2013. The result showed that the annual average SO2 and NO2succeed to meet new GradeⅡnational air quality standards in 2006- 2013. The concentrations of SO2 was lower in 2013 than in 2006 for 45. 8%,the decrease is obvious. The NO2 concentration in 2013 was lower than in 2006 for 5. 9%,the decrease is not obvious. Besides,the air quality in summer and autumn was better than in spring and winter. The monthly mean peak of SO2 and NO2respectively appeared in November 2007 and March 2009. When accumulation or diffusion of SO2 and NO2,the concentration of SO2 was more easily influenced by the average temperature and the concentration of NO2 was more easily influenced by the average relative humidity in 2006- 2013.