Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, School of Environmental Science and Engineering, Nanjing University of Information Science and Technology, Nanjing 210044, China; Jiangsu Environmental Monitoring Center, Nanjing 210036, China.
State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210093, China.
Sci Total Environ. 2016 Jan 15;541:161-166. doi: 10.1016/j.scitotenv.2015.05.058. Epub 2015 Sep 26.
To quantify regional sources contributing to submicron particulate matter (PM1) pollution in haze episodes, on-line measurements combining two modeling methods, namely, positive matrix factorization (PMF) and backward Lagrangian particle dispersion modeling (LPDM), were conducted for the period of one month in urban Nanjing, a city located in the western part of Yangtze River Delta (YRD) region of China. Several multi-day haze episodes were observed in December 2013. Long-range transport of biomass burning from the southwestern YRD region largely contributed to PM1 pollution with more than 25% of total organics mass in a lasting heavy haze. The LPDM analysis indicates that regional transport is a main source contributing to secondary low-volatility production. The high-potential source regions of secondary low-volatility production are mainly located in areas to the northeast of the city. High aerosol pollution was mainly contributed by regional transport associated with northeastern air masses. Such regional transport on average accounts for 46% of total NR-PM1 with sulfate and aged low-volatility organics being the largest fractions (>65%).
为了量化导致雾霾事件中超细颗粒物 (PM1) 污染的区域来源，我们在城市南京进行了为期一个月的在线测量，结合了两种建模方法，即正定矩阵因子分解 (PMF) 和后向拉格朗日粒子扩散模型 (LPDM)。2013 年 12 月观察到了几次持续时间较长的雾霾事件。来自长江三角洲 (YRD) 西南部的生物质燃烧的远距离传输对 PM1 污染贡献很大，在持续的严重雾霾中，总有机物质量的 25%以上来自于 PM1。LPDM 分析表明，区域传输是二次低挥发性产物的主要来源。二次低挥发性产物的高潜在源区主要位于城市东北部地区。高气溶胶污染主要由与东北气流相关的区域传输造成。这种区域传输平均占总 NR-PM1 的 46%，其中硫酸盐和老化的低挥发性有机物是最大的部分 (>65%)。
