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·2,447,543篇论文数据,部分数据来源于NoteExpress
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