2019年柳州市大气污染特征及周末效应分析

Analysis of Air Pollution Characteristics and Weekend Effect of Liuzhou in 2019

文章通过分析2019年柳州市SO2、CO、NO2、O3、PM10和PM2.5等污染物浓度水平和特征变化规律,研究了我国西部工业重镇柳州市的环境空气质量状况、首要污染物变化情况、重污染天气成因,并首次研究了其大气污染的周末效应。结果表明,2019年柳州市环境空气质量优良率为83.01%,首要污染物主要为PM2.5、O3及PM10,曾出现2个阶段的重度污染天气,均发生在冬季。其中,重污染第一阶段为石油型污染;重污染第二阶段为复合型污染,以煤烟型为主,石油型为辅。首次研究了柳州市大气污染物的周末效应,结果表明,O3一年四季均呈周末效应,而其前体物NO2除秋季呈周末效应外,其余均呈反周末效应。

Based on the pollutant concentration and pollution characteristics of sulfur dioxide(SO2),carbon monoxide(CO),nitrogen dioxide(NO2),ozone(O3),PM10 and PM2.5 of Liuzhou in 2019,this paper studied the air quality and the variation of the primary pollutants as well as the reason of the heavy pollution.More important,this paper was the first one to research the weedend effect of the air pollution.The results showed the rate of good air quality was 83.01%.Primary pollutions included PM2.5,O3 and PM10.In the winter of 2019,there were two phanses of the heavily polluted weather happened in Liuzhou.One caused by the fossil fuel combustion,the other mainly caused by the coal burning.The weekend effect in Liuzhou was first studied.The results indicated that O3 exhibited a weekend effect in all seasons,while NO2 exhibited the weekend effect in autumn and anti-weekend effect in the other seasons.