本研究开展了北太平洋至北冰洋（34.4°N-72.0°N）海水中多环芳烃（PAHs）的空间分布。研究结果表明，表层海水中溶解态PAHs呈现出随纬度增加浓度减小的特征，北冰洋中心海区PAHs的垂直剖面分布呈现表层富集、随深度增加浓度减小的特征。建立了白令海PAHs海-气相互作用的Level III逸度模型，模型结果表明，至少在夏季，白令海PAHs仍表现出净沉降的趋势，因此高纬海区仍然是PAHs的“汇”。而较低分子量PAHs如苊烯和苊，它们的沉降和挥发作用几乎达到平衡，环境中任何微小的扰动都可能导致其海-气界面的不平衡，使得这些化合物从北冰洋的储库中释放出来。

相关文章《Fate of polycyclic aromatic hydrocarbons from the North Pacific to the Arctic: Field measurements and fugacity model simulation》于2017年6月发表于环境科学Top期刊《Chemosphere》。

Figure 1. Map of the sampling sites.

Abstract: Polycyclic aromatic hydrocarbons (PAHs) have accumulated ubiquitously in Arctic environments, where re-volatilization of certain organic pollutants as a result of climate change has been observed. To investigate the fate of semivolatile organic compounds in the Arctic, dissolved PAHs in the surface seawaters from the temperate Pacific Ocean to the Arctic Ocean, as well as a water column in the Arctic Ocean, were collected during the 4th Chinese National Arctic Research Expedition in summer 2010. The total concentrations of seven dissolved PAHs in surface water ranged from 1.0 to 5.1 ng L^-1, decreasing with increasing latitude. The vertical profile of PAHs in the Arctic Ocean was generally characteristic of surface enrichment and depth depletion, which emphasized the role of vertical water stratification and particle settling processes. A level III fugacity model was developed in the Bering Sea under steady state assumption. Model results quantitatively simulated the transfer processes and fate of PAHs in the air and water compartments, and highlighted a summer air-to-sea flux of PAHs in the Bering Sea, which meant that the ocean serveed as a sink for PAHs, at least in summer. Acenaphthylene and acenaphthene reached equilibrium in air-water diffusive exchange, and any perturbation, such as a rise in temperature, might lead to disequilibrium and remobilize these compounds from their Arctic reservoirs.