郑州市环境空气污染变化规律研究

Study on Time Change Regulation of Main Atmospheric Pollutants in Zhengzhou

文章对河南省郑州市大气中的四种污染物臭氧、二氧化氮、一氧化碳和PM2.5的时间变化规律进行了分析,并初步探讨了日变化、年变化规律及其影响因素。臭氧呈现出单峰型变化规律,NO2、CO及PM2.5近似为双峰双谷型。年变化规律表现为单峰型,臭氧浓度在夏季达到最大值,冬季达到最低值,而其余三种污染物在冬季浓度达到最高值,在夏季浓度达到最低值。

The time change regulation of four atmospheric pollutants （ozone, nitrogen dioxide, carbonic oxide and PM2.5 ） of Zhengzhou has been studied. And preliminary conclusions on the daily change regulation, on the annual change regulation and on their influence factors have been drawn. The daily change regulation of ozone appears to be bimodal form, while the daily change regulations of the other three pollutants approximate to bimodal form. The annual time regulation is also monomodal form. The maxima of the concentration of ozone appear in summer and the minima appear in winter. Whilethe maxima of the concentration of the other three pollutants appear in winter and the minima appear in summer.