中文摘要：

利用2008年10月15日至11月20日珠江三角洲从化、广州、开平三地的加强观测资料,分析了加强观测期间珠江三角洲的污染气象特征.结果表明,观测期间,造成珠江三角洲空气污染的天气形势可分为冷锋前部型、高压底部型、高压脊控制型3类.冷锋前部型易造成珠江三角洲中部和东北部污染;高压底部型易造成珠江三角洲西南部污染;高压脊控制型易造成珠江三角洲局地性污染.珠江三角洲城市群污染与盛行东北风且日平均风速小于2m/s有密切关系,大部分时间珠江三角洲西南部出现污染,是由于污染物沿着主导风向输送并累积造成.

英文摘要：

As part of the 3C-STAR（synthesized prevention techniques for air pollution complex and integrated demonstration in key city-cluster region） intensive observation,meteorological and air pollutant concentration measurements were performed in Conghua,Guangzhou and Kaiping in the Pearl River Delta（PRD） on Oct.15 to Nov.20,2008.The features of air pollution meteorology over PRD during the intensive observation were analyzed.It was found that the typical types of weather condition associated with poor air quality over PRD during the intensive observation could be summarized into three types（pre-cold front,bottom of high pressure control,ridge of high pressure control）.The pre-cold front type will lead the central and northeastern part of PRD polluted.The bottom of high pressure control type will lead the western part of PRD polluted.The ridge of high pressure control type will result in local air pollution of PRD.The air pollution of the city-cluster of PRD were closely related to the northeasterly prevailing wind with ground wind speed smaller than 2m/s,this situation will lead the southwestern part of PRD polluted for the accumulation of air pollutants transported by the prevailing wind.