珠江三角洲一次大范围灰霾天气下的空气污染特征分析

利用粤港珠江三角洲区域空气监控网络的监测结果，对2006年10月珠江三角洲一次大范围灰霾过程进行分析，研究灰霾天气下珠江三角洲的空气污染特征。研究表明：灰霾引起空气质量恶化，细颗粒物在可吸入颗粒物中比重上升，多项污染物发生超标，臭氧是首要污染物。时间分布上，PM2.5和O3日均值浓度出现峰值相比SO2、NO2、PM10滞后数日，各站污染物的逐时变化曲线随着各自的主要影响因素不同而表现出不同的特征。空间分布上，珠三角空气污染的区域性特征比较明显，其中佛山-广州-东莞一带是珠三角的污染核心区。

Analysis on Spatial-temporal Characteristics of Air Pollution during a Regional Haze Episode over Pearl River Delta

By using the data of Pearl River Delta regional air monitoring network, we analyze the situation and spatial -temporal characteristics of air pollution during a regional haze episode occurred in October 2006 over Pearl River Delta. The results show that haze causes the deterioration of air quality, such as increasing the concentration of each pollutant even over china＇s national standard, raising the ratio of PM2.5 to PM10 and so on. The highest daily concentration of PM2.5 and O3 appear two or three days later than that of SO2 and NO2 and PM10 with the difference between primary pollutants and secondary pollutants. Different diurnal variations of SO2 and NO2 and O3 and PMl0 and PM2.5 indicate generally the major factors including local emissions and transportation at sites. There are significant regional pollution characteristics in Pearl River Delta, of which Foshan, Guangzhou and Dongguan are the most serious areas.