南充市城区2014年空气质量评价及变化特征分析

Evaluation and Variation Feature Analysis of the Air Quality over Nanchong Area in 2014

利用南充市城区5个污染监控点2009-2014年的环境空气质量自动监测数据,对南充市城区2014年环境空气质量进行了评价,并对日、月（季）、年空气质量变化特征和空气质量污染特征进行了初步分析,结果表明：1）南充市环境空气气态污染物（SO2、NO2、CO、O3）对本地空气污染基本无影响;2）细颗粒物PM2.5为南充市环境空气首要污染物,可吸入颗粒物PM10为次要污染物;3）全年冬季（12月、1月、2月）和1日中的12时、24时前后空气污染最为严重,这与污染源排放总量增大和气象及地形影响有关。

The air quality of Nanchong in 2014 is analyzed in this study. The daily,monthly and seasonal variation features of air quality as well as pollutants are discussed using the air quality data of five pollution monitoring stations during 2009- 2014. The results show that： 1） gaseous air pollutants（ SO2,NO2,CO,O3） have no basic impact on the local air pollution;2） PM2. 5makes the biggest contribution to the air quality and PM10 is the secondary pollutant in Nanchong; 3） the air quality is the worst in winter（ December,January and February） and at 12 as well as 24 o＇clock every day,which is related with the increased emission of pollution and the influence of the weather and terrain on the air in Nanchong.