湖南省长株潭城市群环境空气质量易超标指标变化规律研究

Studies on Regulation Patterns of Easily Exceeded Indexes of Ambient Air Quality in Changsha,Zhuzhou and Xiangtan

根据长株潭24个环境空气质量监测国控点数据,分析了CO、SO2、NO2、O3、PM10和PM2.5常规六项污染物不同月份的变化规律,并对首要污染物O3和PM2.5不同时期、不同时段的变化规律以及达标状况进行了分析。研究结果表明:PM2.5和O3浓度的季节性变化大,O3浓度夏季高、冬季低,PM2.5则正好相反;在一天当中,昼间的PM2.5浓度低于夜间;在城市之间,长沙市PM2.5的日均浓度和O3浓度明显高于株洲和湘潭市。上述结论将为制定相应的防治措施提供参考依据。

Based on the monitoring data of environmental air quality from 24 national controlling monitoring sites in Chang- sha, Zhuzhou and Xiangtan, the regular patterns of six conventional pollutants （ CO, SO2, NO2 ,O3 , PMl0 and PM2.5 ）were stud- ied. In addition, the primary air pollutions O3 and PM2.5 in different periods and different time of the regular pattern and standard compliance were also researched. The results indicated that the concentrations of PM2.5 and O3 changed significantly with seasons. The concentration ofO3 in summer was much higher than that in winter. On the contrary, concentration of PM2. 5 was high in win- ter and low in summer. The concentration of PM2.5 was lower in daytime than that in night. From the perspective of spatial distri- bution, the concentration of PM2.5 and O3 were much higher in Changsha than that in Zhuzhou or Xiangtan. These studies could provide reference for formulating prevention measures of air pollution in future.