大连市中心区O3污染特征分析

本文采用2007年大连市环境自动监测数据，分析了城市中心区O3的污染特征。结果表明：O3质量浓度的最大值出现在午后15：00—17：00，比太阳辐射强度最大值的出现时间滞后2h左右；O3质量浓度的季节性变化十分显著，春夏季较高，秋季次之，冬季最低；汽车尾气是近地面O3污染的主要原因。

Pollution Characteristics of Ozone in Dalian Central Urban Area

This article analyzed pollution characteristics of ozone in city central area using Dalian environmental automatic monitoring data in 2007.Results indicated that the maximum concentration of ozone occurred form 3 p.m.to 5 p.m.,which was later about two hours than the time of appearance of maximum solar radiation;the seasonal change of ozone concentration was very notable,the concentration in spring and summer was higher,that in autumn took second place and in winter was lowest;the tail gas of automobile was...