Fate of Polycyclic Aromatic Hydrocarbons in Seawater from the Western Pacific to the Southern Ocean (17.5°N to 69.2°S) and Their Inventories on the Antarctic Shelf
Fate of Polycyclic Aromatic Hydrocarbons in Seawater from the Western Pacific to the Southern Ocean (17.5°N to 69.2°S) and Their Inventories on the Antarctic Shelf
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西太平洋至南大洋（北纬17.5°至南纬69.2°）海水中多环芳烃的归宿及其在南极大陆架的库存
DOI：
10.1021/acs.est.6b02766
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发表时间：
2016-09-06
影响因子：
11.4
通讯作者：
Ye, Jun
中科院分区：
文献类型：
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作者：
Cai, Minggang;Liu, Mengyang;Ye, Jun
会话挥发性有机化合物，如多环芳烃(PAHs)，有可能通过长距离运输到达原始环境。为了研究多环芳烃在南极海水中的远程迁移及其去向，在2010年中国第27次南极科考期间，对西太平洋至南大洋(北纬17.5度~S 69.2度)表层水中溶解的多环芳烃以及普里兹湾及其邻近南大洋3500m以下的多环芳烃剖面进行了观测。表层海水中Sigma(9)多环芳烃的浓度范围为未检出(ND)~21 ng L-1，平均值为4.3ngL-1，其中以三环多环芳烃含量最高。靠近澳大利亚大陆的样本显示出整个邮轮的最高水平。多环芳烃主要来源于牧草、木材和煤炭燃烧等热源。普里兹湾多环芳烃的垂直分布在50m处最大，随深度变化较小。总体而言，我们推测水团和浮游植物可能是影响多环芳烃表层富集深度-枯竭分布的因素。库存估计强调了中层和深层海水对普里兹湾海水中多环芳烃储存的贡献，并表明气候变化很少显示目前储存在主要水库(中层和深层海水)中的多环芳烃迅速释放。
Sesnivolatile organic compounds such as polycyclic aromatic hydrocarbons (PAHs) have the potential to reach pristine environments through long-range transport. To investigate the long-range transport of the PAHs and their fate in Antarctic seawater, dissolved PAHs in the surface waters from the western Pacific to the Southern Ocean (17.5 degrees N to 69.2 degrees S), as well as down to 3500 m PAH profiles in Prydz Bay and the adjacent Southern Ocean, were observed during the 27th Chinese National Antarctic Research Expedition in 2010. The concentrations of Sigma(9)PAH in the surface seawater ranged from not detected (ND) to 21 ng L-1, with a mean of 4.3 ng L-1; and three-ring PAHs were the most abundant compounds. Samples close to the Australian mainland displayed the highest levels across the cruise. PAHs originated mainly from pyrogenic sources, such as grass, wood, and coal combustion. Vertical profiles of PAHs in Prydz Bay showed a maximum at a depth of 50 m and less variance with depth. In general, we inferred that the water masses as well as the phytoplankton were possible influencing factors on PAH surface-enrichment depth-depletion distribution. Inventory estimation highlighted the contribution of intermediate and deep seawater on storing PAHs in seawater from Prydz Bay, and suggested that climate change rarely shows the rapid release of the PAHs currently stored in the major reservoirs (intermediate and deep seawater).