Establishing historical 90Sr activity in seawater of the China seas from 1963 to 2018
Establishing historical 90Sr activity in seawater of the China seas from 1963 to 2018
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建立1963年至2018年中国海域海水中历史性的90Sr活动
DOI：
10.1016/j.marpolbul.2022.113476
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发表时间：
2022-02-28
影响因子：
5.8
通讯作者：
Feng, Liangliang
中科院分区：
文献类型：
--
作者：
Lin, Wuhui;Mo, Minting;Feng, Liangliang
1963年至2018年，中国海域建立了历史Sr-90活性。根据海水中Sr-90活性呈指数下降，Sr-90的有效半衰期（EHL）量化为11.5+/-1.6a、16.5+/-2.4a、27.2+/-6.2a和26.7+/-6.2a 4.3 a 分别位于渤海、黄海、东海和南海。我们发现边缘海和公海中 Sr-90 和 Cs-137 的 EHL 存在对比模式，这与海洋环境中 Sr-90 和 Cs-137 的细微不同路径密切相关。此外，我们还证明福岛衍生的 Sr-90（< 0.01 Bq/m(3)）在中国海域很难识别。我们的研究不仅为预测后福岛时代中国海域的Sr-90活动提供了海洋模型中EHL的关键参数，而且增强了我们对Sr-90行为及其在海洋环境中的命运的理解。
Historical Sr-90 activity in seawater was established in the China seas from 1963 to 2018. Based on the exponential decrease in Sr-90 activity in seawater, the effective half-life (EHL) of Sr-90 was quantified to be 11.5 +/- 1.6 a, 16.5 +/- 2.4 a, 27.2 +/- 6.2 a, and 26.7 +/- 4.3 a in the Bohai Sea, Yellow Sea, East China Sea, and South China Sea, respectively. We found contrasting patterns in the EHL of Sr-90 and Cs-137 in the marginal seas and open oceans that were closely related to the subtly different pathways of Sr-90 and Cs-137 in marine environment. Additionally, we demonstrated that Fukushima-derived Sr-90 (< 0.01 Bq/m(3)) would be difficult to identify in the China seas. Our study not only provided the key parameter of the EHL in marine models for predicting the Sr-90 activity in the China seas in the post-Fukushima era but also enhanced our understanding of Sr-90 behavior and its fate in marine environments.