我国近年来多个城市环境空气质量分析

An Analysis of Recent Ambient Air Quality in Several Chinese Cities

介绍了我国空气质量现状,并通过环保部获取的信息与数据,选取多个典型城市对PM2.5的特点及与环境气象因素的相关性进行定量分析.研究结果表明,PM2.5的污染分布、来源成分均具有区域性特点,质量浓度具有季节性变化特点,与风力呈正相关,与温度相关性较弱;相对湿度对PM2.5的影响较复杂,与降水有很大关系.并结合我国下一阶段PM2.5的治理目标提出了相关建议.

In this paper,by analyzing the data from the Ministry of Environmental Protection of some main cities, we quantitatively discuss the distribution characteristics, principal components and the cor- relation of PM2.5 with environmental and climatic factors. The results show that the PM2.5 source and distribution are regional and the concentration change is seasonal, which is positively correlated with wind, also weakly correlated with air temperature. It is shown from data analysis that the influence of relative humidity on PM2.5 is rather complicated, depending on precipitation intensity. Finally, we point out some suggestions to meet the goal in controlling PM2.5 for the next stage.