Lang Chang, Tao Shu, Liu Wenxin, Zhang Yanxu, Simonich Staci
Laboratory for Earth Surface Processes, College of Environmental Sciences, Peking University, Beijing 100871.
Environ Sci Technol. 2008 Jul 15;42(14):5196-201. doi: 10.1021/es800453n.
A potential receptor influence function (PRIF) model, based on air mass forward trajectory calculations, was applied to simulate the atmospheric transport and outflow of polycyclic aromatic hydrocarbons (PAHs) emitted from China. With a 10 day atmospheric transport time, most neighboring countries and regions, as well as remote regions, were influenced by PAH emissions from China. Of the total annual PAH emission of 114 Gg, 92.7% remained within the boundary of mainland China. The geographic distribution of PRIFs within China was similar to the geographic distribution of the source regions, with high values in the North China Plain, Sichuan Basin, Shanxi, and Guizhou province. The Tarim basin and Sichuan basin had unfavorable meteorological conditions for PAH outflow. Of the PAH outflow from China (8092 tons or 7.1% of the total annual PAH emission), approximately 69.9% (5655 tons) reached no further than the offshore environment of mainland China and the South China Sea. Approximate 227, 71, 746, and 131 tons PAHs reached North Korea, South Korea, Russia-Mongolia region, and Japan, respectively, 2-4 days after the emission. Only 1.4 tons PAHs reached North America after more than 9 days. Interannual variation in the eastward PAH outflow was positively correlated to cold episodes of El Niño/Southern Oscillation. However, trans-Pacific atmospheric transport of PAHs from China was correlated to Pacific North America index (PNA) which is associated with the strength and position of westerly winds.
基于气团向前轨迹计算的潜在受体影响函数（PRIF）模型，被用于模拟中国排放的多环芳烃（PAHs）的大气传输和流出情况。在10天的大气传输时间内，大多数周边国家和地区以及偏远地区都受到了来自中国的PAH排放的影响。在每年114千兆克的PAH排放总量中，92.7%仍在中国内地边界范围内。中国境内PRIFs的地理分布与源区的地理分布相似，在华北平原、四川盆地、山西和贵州省数值较高。塔里木盆地和四川盆地的气象条件不利于PAH流出。在中国流出的PAH中（8092吨，占年PAH排放总量的7.1%），约69.9%（5655吨）最远仅到达中国内地近海环境和南海。分别在排放后2 - 4天，约227吨、71吨、746吨和131吨PAHs到达朝鲜、韩国、俄罗斯 - 蒙古地区和日本。超过9天后，只有1.4吨PAHs到达北美。向东的PAH流出的年际变化与厄尔尼诺/南方涛动的冷事件呈正相关。然而，来自中国的PAHs的跨太平洋大气传输与太平洋北美指数（PNA）相关，该指数与西风的强度和位置有关。
