泰州市冬季空气质量变化特征

Variation Characteristics of the Air Quality in Taizhou during Winter

为了解泰州市冬季空气质量变化特征,于2013年12月27日—2014年1月7日对NO2,SO2,O3,CO,PM10和PM2.5进行了监测,结合地面气象资料和HYSPLIT轨迹模式分析了污染物的来源与传输过程。结果表明,观测期间AQI优良率仅为25%,PM10和PM2.5日均值超标率分别为58.3%,75.0%;有机碳是泰州市ρ(PM2.5)中最高的化学组分,其次是富钾和元素碳。PM2.5主要来源为汽车尾气、工业源、燃煤,分别占来源比例21.76%,16.52%,15.54%。局地污染源和不利气象条件是造成大气污染的主要原因。

The characteristics of air quality in Taizhou were analyzed based on the data of NO2 、 SO2、O3 、 CO、PM10 and PM2.5 observed during Dec. 27,2013 and Jan. 7, 2014. The source and transmission process of pollutants were researched according to the meteorological data and the HYSPLIT trajectory model. The results showed that during the observation period the excellent and good rate of AQI was only 25% , and the over-standard rate of daily average PM10 and PM2.5 concentrations were 58.3% and 75.0% , respectively. According to the monitoring data, the highest chemical composition of PM2.5 was organic carbon in Taizhou, followed by rich potassium and elemental carbon. The main pollutant sources of PM2.5 were automobile exhaust, industrial sources, and coal, which accounted for 21.76% , 16.52% , and 15.54% , respectively. It was concluded that local sources of pollution and adverse weather conditions were the main causes of the air pollution in Taizhou.