Simulation of global distribution of rare earth elements in the ocean using an ocean general circulation model
Simulation of global distribution of rare earth elements in the ocean using an ocean general circulation model
复制标题
利用海洋环流模型模拟海洋中稀土元素的全球分布
DOI：
10.1007/s10872-021-00600-x
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发表时间：
2021
影响因子：
2.3
通讯作者：
H. Obata
中科院分区：
文献类型：
--
作者：
A. Oka;H. Tazoe;H. Obata
在这项研究中，我们报告我们的海洋环流模式模拟全球分布的稀土元素（REEs）在海洋中。如先前所报告（Oka等人，载于《全球生物地球化学循环》23：1-16，2009年），北太平洋稀土元素的垂直分布受到可逆清除过程的强烈控制，通过选择控制对颗粒亲和力的适当模型参数，可以在模型中再现稀土元素之间的系统差异。在这里，我们证明，从沿海地区的外部稀土输入也发挥了作用，在控制溶解稀土元素的垂直剖面和它们的跨流域差异。外部输入的作用对于轻稀土元素（如钕）尤其重要。在北太平洋的Nd浓度的线性增加不能充分再现的可逆清除单独的，相反，可逆清除和外部输入的组合是必要的。另一方面，重稀土元素，如镥（Lu）的分布，可以广泛地复制没有外部输入，这表明Lu具有保守的营养类示踪剂的相似性。当与最近获得的GEOTRACES数据集和GEOTRACES前报告的数据汇编的REE观测结果相比时，我们的模拟成功地再现了这些观测结果的整体特征。观测数据表明，稀土元素的垂直剖面是不一样的盆地之间，我们的模型模拟表明，这一功能可以清楚地再现考虑可逆清除和外部稀土输入从沿海地区。
In this study, we report our ocean general circulation model simulations of the global distribution of rare earth elements (REEs) in the ocean. As previously reported (Oka et al. in Glob Biogeochem Cycles 23:1–16, 2009), the vertical profiles of REEs in the North Pacific Ocean are strongly controlled by the reversible scavenging process, and the systematic differences between REEs can be reproduced in the model by selecting an appropriate model parameter which controls affinity to particles. We here demonstrate that the external REE input from the coastal regions also plays a role in controlling the vertical profiles of dissolved REE and their inter-basin differences. The role of the external inputs is especially important for light REEs, such as neodymium (Nd). The linear increase in Nd concentration in the North Pacific Ocean cannot be sufficiently reproduced by the reversible scavenging alone; rather, a combination of the reversible scavenging and the external inputs is necessary. On the other hand, the distribution of heavy REEs, such as lutetium (Lu), can be broadly reproduced without the external inputs, suggesting that Lu has similarity with conservative nutrient-like tracer. When compared with REE observations compiled from both the recently obtained GEOTRACES dataset and pre-GEOTRACES reported data, our simulations successfully reproduced the overall features of these observations. Observational data suggested that the vertical profiles of REEs are not the same among the basins; our model simulations demonstrate that this feature can be clearly reproduced by considering both the reversible scavenging and the external REE inputs from the coastal regions.
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