College of Marine Ecology and Environment, Shanghai Ocean University, Shanghai 201306, China; National Marine Environmental Monitoring Center, Dalian 116023, China; Hainan Tropical Ocean University, Sanya 572022, China.
College of Marine Ecology and Environment, Shanghai Ocean University, Shanghai 201306, China; National Marine Environmental Monitoring Center, Dalian 116023, China.
Mar Pollut Bull. 2021 May;166:112195. doi: 10.1016/j.marpolbul.2021.112195. Epub 2021 Mar 18.
The sink-source controversy for global polycyclic aromatic hydrocarbons (PAHs) in high-latitude seas is extremely concerning. A level III fugacity model was developed for the southern Chukchi Sea to estimate the fate of 16 priority PAHs. The model results indicate large losses were due to seawater advection outflow, followed by degradation in seawater. The Chukchi Sea serves as a source of 4 PAHs (i.e., Nap, Ace, Acp and Fl) in the atmosphere and sediment but acts as a final sink for the other 12 PAHs. The water-air diffusion flux and wet deposition flux play dominant roles in the total transfer flux of the 4 PAHs and the other 12 PAHs, respectively. The source/sink role that high-latitude seas play in PAH distribution has changed under the influence of global climate change. The model proposed in this study provides an approach to support further study of the fate of PAHs in high-latitude seas.
高纬度海洋中全球多环芳烃（PAHs）的源汇争议备受关注。本研究针对楚科奇海南部地区开发了一个 III 级逸度模型，用于估算 16 种优先 PAHs 的归宿。模型结果表明，多环芳烃的大量损失归因于经向海流的输出，其次是在海水中的降解。楚科奇海作为大气和沉积物中 4 种 PAHs（即萘、苊烯、苊和芴）的源区，但却是其他 12 种 PAHs 的最终汇区。水-气扩散通量和湿沉降通量分别在 4 种 PAHs 和其他 12 种 PAHs 的总迁移通量中起主导作用。在全球气候变化的影响下，高纬度海洋在 PAH 分布中扮演的源汇角色发生了变化。本研究提出的模型为进一步研究高纬度海洋中 PAHs 的归宿提供了一种方法。
