Nuclear Pollution in the East China Sea from the Fukushima Disaster

X. Liang, Yineng Rong
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Abstract

Nuclear pollution has become a new form and perhaps more harmful type of pollution that obsesses coastal regions; it has been of increasing concern after the disastrous Fukushima nuclear leak on March 11, 2011. In order to assess the impact of the Fukushima accident on the East China Sea (ECS), a highly resolved model is set up to simulate the evolution of the Cs concentration. Different from previous studies in this regard, here we take into account the radionuclides originally existing in the ocean. It is found that the radionuclides from the Fukushima leak do have reached ECS, though with a concentration far below the harmful level. The major waterways that inlet the radionuclides are Taiwan Strait and the waterway east of Taiwan. The radioactive material tends to accumulate in the ECS until reaching its peak in 2019; afterward, the outflux through Tokara Strait and Tsushima exceeds the influx through the two southern waterways, and the material resumes in 2021 to its original state. The concentration is neither homogeneously nor stationarily distributed; for example, usually in summer, there is a high center over the Subei Bank in the Yellow Sea. This study is expected, should a similar accident happen again, to help decide where to monitor the ocean, and, hopefully, how to get the pollution under control.
福岛核事故对东海的核污染
核污染已成为困扰沿海地区的一种新形式、或许危害更大的污染;在2011年3月11日灾难性的福岛核泄漏事件之后,这一问题日益引起人们的关注。为了评估福岛核事故对东海的影响,建立了一个高分辨率模型来模拟Cs浓度的演变。与以往在这方面的研究不同,这里我们考虑了原来存在于海洋中的放射性核素。发现福岛泄漏的放射性核素确实达到了ECS,尽管浓度远低于有害水平。放射性核素流入的主要水道是台湾海峡和台湾以东的水道。放射性物质倾向于在ECS中积累,直到2019年达到峰值;之后,通过托卡拉海峡和对马岛的流出量超过了通过南部两条水道的流入量,材料在2021年恢复到原来的状态。浓度分布既不均匀也不平稳;例如,通常在夏天,在黄海苏北岸上有一个高中心。如果类似的事故再次发生,这项研究有望帮助决定在哪里监测海洋,以及如何控制污染。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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