高层大气臭氧能够吸收紫外线保护地球生物,但是低空和近地面臭氧却是危害人类健康和动植物生长的污染气体。 氮氧化物也是空气中的污染气体,臭氧和氮氧化物可以相互转化,研究二者的变化关系具有重要意义。 2011年12月利用EC9810A臭氧分析仪和EC9841氮氧化物分析仪,在北京中国环境科学研究院进行测量, 得到了臭氧和氮氧化物的变化特征,分析结果表明臭氧和氮氧化物具有日变化特征,白天臭氧浓度呈现 先上升后下降的趋势,夜里比较平稳;氮氧化物与臭氧变化趋势呈负相关,白天浓度先下降后升高,夜间 浓度大于白天;臭氧的变化与气象条件有关,在晴天上升较快,峰值大,阴天上升慢,峰值小;臭氧的含 量还具有明显的季节特征,春季的浓度要比冬季的浓度高。氮氧化物的变化与人们的生活关系密切, 汽车尾气等废气的排放是导致氮氧化物含量升高的重要原因。同时利用中科院安徽光机所研制的AML-3车 载激光雷达测量了臭氧在白天垂直高度上的分布,在500～1000 m高度上臭氧的平均含量变化与分析仪测量趋势比较一致。

At upper atmosphere, ozone can absorb ultraviolet and protect life on earth, but at low altitude and near-ground ozone is polluting gas endangering human health, animal and plant growth. Nitrogen oxides are also polluting gases in the air. Ozone and nitrogen oxides can be transformed into each other. Research on the relationship between the two gas is of great significance. Based on EC9810A ozone analyzer and EC9841 nitrogen oxide analyzer, the observation at Chinese Research Academy of Environment Sciences in Beijing during December, 2011 is carried out, and the distributed characteristics of ozone and nitrogen oxide during day and night were obtained. The analysis shows obvious distributed characteristics of ozone and nitrogen oxide during day and night. At daytime, concentration of ozone increases at morning, and then decreases at afternoon. At night, it keeps a steady status and the concentration is less than that in daytime. The trend of nitrogen oxide is opposite to ozone. At daytime, the concentration of nitrogen oxide decreases at morning and then increases at afternoon. The change of ozone has the relationship with meteorology. On sunny day, the concentration of ozone has a sharp increase, but at cloudy day or rainy day, has a slow increase. And the concentration of ozone also changes with the season, it is higher in spring than that in winter. The main reason that results in the concentration increase of nitrogen oxide is the emission of automobile exhaust and other waste gas. AML-3 mobile lidar developed by Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences is used to measure the vertical profile. Variation of mean ozone concentrations from 500 m to 1000 m has a consistent trend with ozone analyzer.