Key Laboratory of Aerosol Chemistry and Physics, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, China; South China Institute of Environmental Sciences, Ministry of Environmental Protection, Guangzhou, China.
Air Quality Research Division, Science and Technology Branch, Environment and Climate Change Canada, Toronto, Canada.
Sci Total Environ. 2017 Jan 1;574:1559-1570. doi: 10.1016/j.scitotenv.2016.08.175. Epub 2016 Sep 7.
Daily PM samples were collected at an urban site in Guangzhou in 2014 and at a suburban site in Zhuhai in 2014-2015. Samples were subject to chemical analysis for various chemical components including organic carbon (OC), element carbon (EC), major water-soluble inorganic ions, and trace elements. The annual average PM mass concentration was 48±22μgmand 45±25μgm in Guangzhou and Zhuhai, respectively, with the highest seasonal average concentration in winter and the lowest in summer at both sites. Regional transport of pollutants accompanied with different air mass origins arriving at the two sites and pollution sources in between the two cities caused larger seasonal variations in Zhuhai (>a factor of 3.5) than in Guangzhou (<a factor of 2.0). Positive matrix factorization (PMF) analysis identified six and five major source factors for PM in Guangzhou and Zhuhai, respectively. Ship emissions, a source factor previously ignored in making emission control policies in the Pearl River Delta region of south China, were among the top contributors to PM at both sites, accounting for >17% of PM mass concentrations.
2014 年在广州市城区和 2014-2015 年在珠海市郊区采集了每日 PM2.5 样本。对这些样本进行了各种化学成分的化学分析，包括有机碳（OC）、元素碳（EC）、主要水溶性无机离子和微量元素。广州和珠海的年平均 PM2.5 质量浓度分别为 48±22μg/m3 和 45±25μg/m3，两地冬季的季节性平均浓度最高，夏季最低。污染物的区域传输伴随着不同的气团到达这两个站点，以及两个城市之间的污染源，导致珠海的季节性变化较大（>3.5 倍），而广州的变化较小（<2.0 倍）。正定矩阵因子分析（PMF）确定了广州和珠海 PM 的六个和五个主要来源因素。船舶排放是中国南方珠江三角洲地区制定排放控制政策时以前忽略的一个来源因素，在这两个站点的 PM 中都属于主要贡献者，占 PM 质量浓度的>17%。
