城市臭氧浓度变化规律分析

随着经济社会的发展,人们对环境质量更加重视,光化学烟雾成为影响城市环境空气质量的重要因素。利用北方某城市全年臭氧监测的时间浓度,对臭氧污染的浓度时间以及季节变化特征进行了分析。结果表明,臭氧浓度随季节变化趋势明显,春、夏季臭氧浓度较高,秋季臭氧浓度次之。臭氧浓度在每天中呈单峰型的变化规律,白天臭氧浓度处于较高水平,夜间臭氧浓度较低。臭氧浓度日变化随季节变化明显。与冬季相比,春、夏和秋季臭氧浓度的日变化幅度比较大,臭氧浓度分布比较分散;周末臭氧浓度的日变化幅度大于平日。

With the development of economic society, environment quality is gaining increasing attention. Photochemical smog has become an important impact factor of urban air quality. Based on the observed 03 temporal concentrations of a northern city, the diurnal concentrations of 03 pollution and its seasonal characteristics were analyzed. And the results showed that the trend of seasonal fluctuation of 03 concentrations was obvious with higher concentrations in spring and summer, lower concentrations in autumn and winter. The 03 concentrations exhibited a diurnal character- istic of a single peak, and were higher during day, lower during night. The diurnal variations of 03 concentrations exhibited a strong seasonal characteristic. The diurnal variation of 03 concentrations was bigger with a more disperse distribution in spring and summer compared with that in winter. The varying scopes of 03 concentrations were broader in weekends than in weekdays.