【摘要】 基于轨迹聚类法,对2014年12月至2015年1月重庆主城区后向轨迹气团进行聚类,分析重庆主城区气团来源。结合主城区PM2.5的在线浓度资料和浓度权重分析法(CWT)定量分析了重庆主城区PM2.5的潜在源区。结果表明,重庆本地气团占61%,不利于本地污染物的扩散;60%以上的污染事件是由本地PM2.5聚集所造成的;重庆主城区PM2.5潜在污染源区主要集中在重庆本地、西藏与四川交界处、四川东部和贵州北部。更多还原

【Abstract】 During December 2014 to January 2015,this article uses the method of trajectory clustering the backward trajectories which reaching Chongqing urban area to analysis main source of air mass. Combined with the concentration of PM2. 5hourly of the urban area,under the condition of heavy pollution,this article analysis the characteristics of the backward trajectories of Chongqing urban area. Finally combining with CWT,this article quantitatively analysis the potential source areas of fine particulate matters. The results show that the Chongqing local air masses is 61%,which means it do not be conducive to the diffusion of the pollutants from the local; more than 60% of heavy pollution events are caused by local particle aggregation. The potential pollution source area of Chongqing urban particulate matters are mainly in Chongqing local,the junction of Sichuan an Tibet,the eastern Sichuan and northern Guizhou.更多还原