贵阳市主城区空气质量指数时空分布特征

为了解贵阳市主城区空气质量指数的时间分布和空间分布特征，采用时间序列法和插值法统计分析了2013~2015年贵阳市9个空气自动监测点SO2、NO2、PM10、PM25、CO的监测数据。结果表明：2013~2015年期间，贵阳市主城区空气质量整体良好,优于Ⅱ级空气质量标准，IAQISO2、IAQINO2、IAQIPM10、IAQIPM25、IAQICO的年均值呈现降低趋势, 空气污染物得到一定的控制；季节变化和月变化分析表现出冬季空气质量最差，夏季最好的特征。春节半月ISO2、IAQINO2、IAQIPM10、IAQIPM25的均值好于冬季均值，反映了工业和交通污染源的主控作用。空间分布上，IAQISO2、IAQINO2、IAQIPM10、IAQIPM25、IAQICO呈现“市区高，郊区低”的分布特征，空气质量指数较高的区域集中在贵阳市主城区中部和东北部

Temporal and Spatial Distribution Characteristics of Air Quality Index in Guiyang，China

To understand the temporal and spatial distribution of air quality index (AQI) in urban Guiyang, the concentration data of SO2, NO2, PM10, PM25 and CO at nine air quality monitoring stations were analyzed from 2013 to 2015. The results showed that the AQIs were better than Level II, and the average IAQISO2、IAQINO2、IAQIPM10、IAQIPM25、IAQICO declined in these three years, indicating a good control of air pollutants. The seasonal variation exhibited that air quality was the worst in Winter while the best in Summer. The average IAQI during Spring Festival was significantly better than that of the whole winter, suggesting industry and traffic were probably the main contribution of air pollution. The spatial distribution of IAQISO2, IAQINO2, IAQIPM10, IAQIPM2.5, IAQICO were higher in the urban area but lower in the suburb. The high AQI values mainly distributed in the urban center and northeast of Guiyang City