近3年苏州市吴中区空气质量动态监测结果与成因分析  

Dynamic Monitoring and Genetic Analysis of Air Quality in Wuzhong District, Suzhou in the Latest 3 Years

作　　者：张艳珍[1] 李建龙[1] 刚成诚[1] 毛刚 浦惠民 秦惠平 

机构地区：[1]南京大学生命科学学院,江苏南京210093 [2]苏州市吴中区环保局,江苏苏州215104

出　　处：《天津农业科学》2015年第4期84-89,共6页Tianjin Agricultural Sciences

基　　金：苏州市科技计划项目(科技支撑计划-农业项目(SNG201447));江苏省农业三新工程项目(SXGC[2014]287);APN全球变化项目(ARCP2014-06NMY-Li);国家自然科学基金面上项目(41271361);苏州市吴中区生态红线区域保护规划项目

摘　　要：为探讨苏州市吴中区近3年大气污染特征及其空气质量状况,采用数理统计方法结合2012年2月最新颁布的《环境空气质量标准》,对2011—2013年苏州市吴中区表征每日空气污染的各项指标作月平均化、3年均值化和频率分析等处理,对处理后的结果进行分析。结果表明,2011—2013年苏州市吴中区SO2、NOX、NO2、PM10月际变化趋势趋于一致,12月份和1月份各指标值相对较高,8月份各指标的值最低;2011—2013年每年首要污染物累计值最大的分别是NO2、PM10和PM2.5,频度分别达到266,214,94 d;根据国家环境空气质量二级标准(GB 3095—2012),2011—2013年NOx、NO2和PM10年均值浓度都超标,其中NOx超标最严重,3年分别达到1.71,1.34和1.44倍;近3年苏州市吴中区空气质量以二级良为主,空气质量中等,夏季空气质量最好,冬季最差;空气质量指数级别一、二级累积百分比3年分别达到76.1%,79.3%,53.5%,出现优良空气质量的天数分别达到277,290,195 d。To explore air pollution characteristics and air quality conditions of Wuzhong District , Suzhou, combining mathematical statistics with the latest ＂Ambient Air Quality Standards＂, promulgated in February 2012, the air condition in Wuzhong District, Suzhou from 2011-2013 was studied. The air pollution index of monthly average, three-year average and frequency analysis were processed and analyzed. The results showed that 02, NOx, NO2, PM10 shared similar changing trend at monthly level, which was high- er in December and January, but lower in August. The primary pollutant in 2011, 2012 and 2013 was NO2 （266 d）, PMI0 （214 d） and PM2.5 （94 d）, respectively. According to the national ambient air quality standard （GB3095-2012）, NOx, NO2 and PM10 all exceed- ed standards in the past 3 years, in which the NOx exceeded the most, with 1.71, 1.34 and 1.44 times of the standard, respectively. Overall, the air quality in Wuzhong District was in a fine condition during the past 3 years. The AQI results showed that the air condi- tion in summer was the best, but the worst in winter. The AQI in first and second level reached 76.1%, 79.3% and 53.5% in 2011- 2013, days with the fine air condition were 277,290 and 195 in 2011, 2012 and 2013,respectively.

关 键 词：苏州市吴中区 城市生态与环境 空气质量水平 空气质量指数 空气质量标准 

分 类 号：X831[环境科学与工程—环境工程]