【摘要】 中国各城市细颗粒物(PM_2.5)环境空气质量差异较大,呈现明显的区域污染特征。合理划分PM_2.5污染防治区域、开展区域性大气环境管理,是改善区域空气质量的重要途径。根据2015年全国108个重点城市大气PM_2.5的日均浓度数据,使用系统聚类方法对各城市的PM_2.5全年污染变化特征进行分析,从而划分出不同防治区域。依据聚类分析的3项原则,综合比较4种不同聚类方法及结果,最后提出可以划分出8个PM_2.5污染防治区域:a赣鄂湘接壤地区（长株潭及周边城市）,b成渝及周边地区,c粤桂地区,d闽浙沿海城市群,e东三省地区,f长三角地区,g山东及周边地区,h京津冀、山西中北部、陕西关中城市群。更多还原

【Abstract】 PM_2.5 pollution level varies greatly among cities and bears variable regional characters in China. It is an important way to improve regional air quality that regionalizing for PM_2.5 control and thereby conducting regional air pollution management.Based on the data of PM_2.5 daily mean concentrations of 108 cities in 2015,this study regionalized the PM_2.5 pollution by using Hierarchical Cluster Analysis. Four hierarchical cluster analysis methods were compared,as well as three principles were taken into account during the analysis process. Finally,eight PM_2.5 control regions were put forward as the results. This study aims at providing methodology and practical reference for regionalization of PM_2.5 management in China.更多还原