利用中国环境监测总站发布的2013年11月1日～2014年12月12日污染物实时浓度数据,分析了京津冀地区污染物变化特征。结果显示: PM2.5、PM10、SO2、NO2和CO浓度年平均值分别为95.3, 163.9, 54.7, 48.9 μg/m3, 1.5 mg/m3;五种污染物浓度都表现出冬季高夏季低的季节变化特征,但不同污染物在不同的月份又有其特殊的变化特征。APEC期 间京津冀地区PM2.5、PM10、SO2、NO2和CO平均浓度分别为66.1, 123.7, 33.2, 48.5 μg/m3, 1.2 mg/m3。APEC期间京津冀地区PM2.5浓度是APEC前后一个月的60.1%、59.4%; APEC期间气态 污染物CO、SO2、NO2浓度与APEC前一个月相当,但APEC后急剧增加。减排措施使京津冀地区PM2.5浓度削减40%左右, PM10削 减35%左右, NO2削减10%左右, CO削减15%左右。

Data of pollutant concentrations from November 1, 2013 to December 12, 2014 were collected from China National Environmental Monitoring Centre and employed to analyze the variation of pollutant concentrations in Beijing-Tianjin-Hebei region during APEC summit, 2011. The result shows that the annual mean concentrations of PM2.5, PM10, SO2, NO2 and CO are 95.3, 163.9, 54.7, 48.9 μg/m3, 1.5 mg/m3, respectively. Concentrations of these five kinds of pollutants are highest in winter and the lowest in summer, while different pollutant has different monthly distribution. During APEC summit, average concentrations of PM2.5, PM10, SO2, NO2 and CO are 66.1, 123.7, 33.2, 48.5 μg/m3, 1.2 mg/m3, respectively. The concentrations of PM2.5 during APEC summit account for 60.1% and 59.4% before and after APEC summit, respectively. The concentrations of CO, NO2 and SO2 during APEC summit are nearly the same as the concentrations before APEC summit, but increase significantly after APEC summit. Owing to the strict emission control, the concentrations of PM2.5, PM10, CO and NO2 in Beijing-Tianjin-Hebei region decrease by 40%, 35%, 15% and 10%, respectively.