Atmospheric transport and outflow of polycyclic aromatic hydrocarbons from China
Atmospheric transport and outflow of polycyclic aromatic hydrocarbons from China
复制标题
中国多环芳烃的大气迁移和流出
DOI：
10.1021/es800453n
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发表时间：
2008-07-15
影响因子：
11.4
通讯作者：
Simonich, Staci
中科院分区：
文献类型：
--
作者：
Lang, Chang;Tao, Shu;Simonich, Staci
采用基于大气质量前向轨迹计算的潜在受体影响函数（PRIF）模式，模拟了中国多环芳烃（PAHs）的大气输运和外流。在10天的大气传输时间内，大多数邻近国家和地区以及偏远地区都受到中国PAH排放的影响。在每年114千兆克的多环芳烃总排放量中，92.7%留在中国大陆境内。中国境内PRIF的地理分布与源区的地理分布相似，华北平原、四川盆地、山西和贵州省的PRIF值较高。塔里木盆地和四川盆地为PAH外流的不利气象条件。在从中国流出的多环芳烃中（8092吨或年多环芳烃排放总量的7.1%），约69.9%（5655吨）到达中国大陆和南海的近海环境。大约227吨、71吨、746吨和131吨多环芳烃分别在排放后2-4天到达朝鲜、韩国、俄罗斯-蒙古地区和日本。只有1.4吨多环芳烃在超过9天后到达北美。PAH向东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，来自中国的多环芳烃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。
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 Nino/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.