【摘要】 该研究利用2015年1月-2021年2月中国近1 500个大气质量监测站点的数据，结合小波分析和收敛交叉映射分析（CCM），研究了9个分区内PM_2.5、PM₁₀、O₃、NO₂、SO₂和CO浓度的时空演化、周期性特征和交互耦合。发现大部分站点的污染物浓度呈季节性振荡，夏季低、冬季高，O₃为例外。华北及周边地区污染物浓度高，华南和青藏地区低，但东南沿海地区O₃浓度增多。各污染物年均浓度整体呈下降趋势，其中2020年PM_2.5、PM₁₀、NO₂、SO₂和CO比2015年分别降低了33.08%、33.51%、18.12%、60.66%和31.86%，而O₃升高了7.07%。NO₂逐渐取代SO₂成为主要污染物。季节变化和区域分布存在明显差异，不同污染物之间双向交互耦合关系显著，其中PM₁₀、PM_2.5和CO交互耦合强度高，而O₃交互耦合最弱。CO和NO₂控制对PM_2.5和O₃控制至关重要，协同控制具有重要意义。更多还原

【Abstract】 The study utilized hourly monitoring data from approximately 1 500 ground-level air quality monitoring stations across China from January 2015 to February 2021.By integrating wavelet analysis and convergent cross mapping （CCM）,the research examined the spatiotemporal evolution,periodic characteristics,and interactive coupling of PM_2.5,PM₁₀,O₃,NO₂,SO₂,and CO concentrations in nine regions.The findings revealed that the concentrations of most pollutants exhibited significant seasonal oscillations,with lower levels in summer and higher levels in winter,except for O₃.High pollutant concentrations were predominantly observed in North China and its surrounding areas,while lower concentrations were typically found in South China and the Qinghai-Tibet Plateau,with an increase in O₃concentrations in the southeastern coastal region.Overall,the annual average concentrations of PM_2.5,PM₁₀,NO₂,SO₂,and CO decreased by 33.08%,33.51%,18.12%,60.66%,and 31.86%respectively in 2020 compared to 2015,whereas O₃concentrations increased by 7.07%.NO₂gradually replaced SO₂as the primary pollutant.There were distinct seasonal variations and regional disparities,with significant bidirectional interactive coupling among different pollutants.The coupling strength was higher between PM₁₀,PM_2.5,and CO,while it was weakest for O₃.The control of CO and NO₂is crucial for managing PM_2.5and O₃,highlighting the significance of coordinated control measures.更多还原