There is a similar annual variation trend between surface ozone concentration and ultraviolet radiation,and both of their values reach to the maximum from June to August of a year,and the minimum values appear between November and January.
地面O_3浓度和紫外辐射的年变化趋势相似,两者同在一年中的6-8月份达到最大值,最小值在11月到1月期间。
参考来源 - 半干旱地区近地面臭氧特性的观测研究Thirdly, CWT(Continue Wavelet Transform) were used to analyze the period of surface O3 of the sites, and contents of surface ozone of the sites showed quasi-biennial , quasi-four year and quasi-eleven year periods besides the obvious annual variation.
三、用小波分析的方法分析各站点地面O3含量的变化周期，各站点地面O3分别表现出的明显的周期除年变化以外，有准两年、四年和11年这三个周期。
参考来源 - 北半球地面臭氧的分布和变化特征分析Therefore,it is very meaningful to enhance the study of surface ozone.
因此,加强近地面臭氧的研究具有重要意义。
参考来源 - 北京市地面臭氧和前体物浓度变化规律及气象因子影响机制分析·2,447,543篇论文数据，部分数据来源于NoteExpress
In 1997, for instance, the E.P.A. moved to reduce surface ozone, a form of pollution caused, in part, by emissions from oil refineries.
举例来说，1997年，美国环保署意图降低地表臭氧量标准——一种部分由石油精炼排放的污染物造成的污染。
The results indicate that impacts of atmospheric particles on photochemistry and oxidation ability of atmosphere are responsible for the reduction of the observed surface ozone concentration.
研究表明，颗粒物对光化学过程的抑制造成了大气氧化能力的降低，是近地面臭氧浓度减少的可能原因。
Ozone forms a protective layer between 12 and 30 miles above the Earth's surface.
臭氧在距地球表面12至30英里的地方形成一个保护层。
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