College of Marine Sciences, Shanghai Ocean University, Shanghai 201306, China.
Lancaster Environment Centre, Lancaster University, Lancaster, LA1 4YQ, UK.
Environ Pollut. 2017 Aug;227:498-504. doi: 10.1016/j.envpol.2017.04.087. Epub 2017 May 8.
Eighteen polycyclic aromatic hydrocarbons (PAHs) were measured in surficial sediments along a marine transect from the North Pacific into the Arctic Ocean. The highest average ΣPAHs concentrations were observed along the continental slope of the Canada Basin in the Arctic (68.3 ± 8.5 ng g dw), followed by sediments in the Chukchi Sea shelf (49.7 ± 21.2 ng g dw) and Bering Sea (39.5 ± 11.3 ng g dw), while the Bering Strait (16.8 ± 7.1 ng g dw) and Central Arctic Ocean sediments (13.1 ± 9.6 ng g dw) had relatively lower average concentrations. The use of principal components analysis with multiple linear regression (PCA/MLR) indicated that on average oil related or petrogenic sources contributed ∼42% of the measured PAHs in the sediments and marked by higher concentrations of two methylnaphthalenes over the non-alkylated parent PAH, naphthalene. Wood and coal combustion contributed ∼32%, and high temperature pyrogenic sources contributing ∼26%. Petrogenic sources, such as oil seeps, allochthonous coal and coastally eroded material such as terrigenous sediments particularly affected the Chukchi Sea shelf and slope of the Canada Basin, while biomass and coal combustion sources appeared to have greater influence in the central Arctic Ocean, possibly due to the effects of episodic summertime forest fires.
十八种多环芳烃 (PAHs) 在北太平洋到北极洋的海洋横断面上的表层沉积物中进行了测量。在北极的加拿大海盆大陆斜坡上观察到的ΣPAHs 浓度最高（68.3 ± 8.5 ng g dw），其次是楚科奇海架沉积物（49.7 ± 21.2 ng g dw）和白令海沉积物（39.5 ± 11.3 ng g dw），而白令海峡沉积物（16.8 ± 7.1 ng g dw）和北极中部海洋沉积物（13.1 ± 9.6 ng g dw）的平均浓度相对较低。主成分分析与多元线性回归（PCA/MLR）的使用表明，平均而言，与石油相关或源自岩石的来源对沉积物中测量的 PAHs 贡献了约 42%，其特征是甲基萘的浓度高于未烷基化母体 PAH 萘。木材和煤炭燃烧贡献了约 32%，高温热成因来源贡献了约 26%。源自岩石的来源，如油苗、异地煤和沿海侵蚀物质（如陆源沉积物），特别是影响了楚科奇海架和加拿大海盆的大陆斜坡，而生物质和煤炭燃烧的来源在北极中部海洋似乎有更大的影响，这可能是由于季节性夏季森林火灾的影响。
