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首页> 外文期刊>Journal of oceanography >Oceanic dispersion simulation of perfluoroalkyl substances in the Western North Pacific associated with the Great East Japan Earthquake of 2011
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Oceanic dispersion simulation of perfluoroalkyl substances in the Western North Pacific associated with the Great East Japan Earthquake of 2011

机译：与2011年东日本大地震相关的北太平洋西部全氟烷基物质的海洋扩散模拟

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摘要

The Great East Japan Earthquake on 11 March 2011, followed by the tsunami and fire, resulted in serious environmental problems in and around Japan. A huge amount of material was discharged into the ocean after the tremendous flood damage of the tsunami. A monitoring survey of the perfluoroalkyl substances (PFAs) found evidence showing an abrupt increase in the PFA concentration in the ocean east of Japan in 2011 after the earthquake. To confirm the anomalous input of two typical PFAs, perfluorooctanoate (PFOA) and perfluorooctanesulfonate (PFOS), from the Japanese coast into the ocean, associated with the earthquake, we conducted a series of chemical tracer simulations using an eddy-resolving ocean reanalysis product: JCOPE2. The simulation model involves processes representing the emission of PFAs from the land triggered by the tsunami flood, advection of the polluted waters, and decay of the concentration by the background oceanic turbulence. Comparison of the PFOA simulation results with the observation confirms a spike-like input of PFOA into the Western North Pacific after the earthquake. Advection and diffusion by the Kuroshio Extension and the mesoscale eddies play a key role in the dilution of the concentration. Optimization of unknown simulation parameters leads to an estimation of the total amount of the anomalous PFOA emission. In contrast, the PFOS simulations are not able to explain the observed distribution, suggesting possible differences in the oceanic transport processes between PFOS and PFOA.
机译：2011年3月11日的东日本大地震以及随后的海啸和大火导致日本及其周围地区出现严重的环境问题。海啸造成巨大的洪水破坏后，大量物质被排入海洋。一项对全氟烷基物质（PFA）的监测调查发现，证据表明地震后2011年日本东部海洋中PFA浓度突然增加。为了确认与地震相关的从日本海岸到海洋的两种典型PFA的全氟辛酸（PFOA）和全氟辛烷磺酸（PFOS）的异常输入，我们使用了解析涡旋的海洋再分析产品，进行了一系列化学示踪剂模拟： JCOPE2。该模拟模型涉及以下过程：代表海啸洪水引发的陆地中PFA的排放，污染水的平流以及背景海洋湍流引起的浓度衰减。将PFOA模拟结果与观测结果进行比较，证实了地震后PFOA向北太平洋西部的穗状输入。黑潮引伸和中尺度涡流的平流和扩散在浓度的稀释中起关键作用。未知模拟参数的优化导致对异常PFOA排放总量的估计。相反，全氟辛烷磺酸模拟不能解释观测到的分布，表明全氟辛烷磺酸和全氟辛烷磺酸在海洋运输过程中可能存在差异。

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