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首页> 外文期刊>Earth and Planetary Science Letters: A Letter Journal Devoted to the Development in Time of the Earth and Planetary System >The relationship between cadmium and phosphate in the Atlantic Ocean unravelled
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The relationship between cadmium and phosphate in the Atlantic Ocean unravelled

机译：镉与磷酸盐之间的关系解开

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Cadmium (Cd) is not generally considered a nutrient element, but behaves like a nutrient in the oceans and might play an important role in ocean biology after all. The relationship between Cd and the nutrient phosphate (PO4) has been studied for over 40 yrs, but the debate on the driving mechanism and reason behind the 'kink', a change in the steepness of the slope is ongoing. Using new data of high accuracy and spatial resolution covering the West-Atlantic Ocean from north to south, in combination with a robust extended optimum multiparameter (eOMP) water mass model, we show that mixing between different water masses is the dominant factor explaining the observed correlation and its kink. Regeneration of Cd via remineralisation explains the smaller scale variability, notably in the surface ocean. Observations imply the availability of Cd in surface waters determines the Cd-uptake and thus the Cd:PO4 remineralisation ratio. This ratio is variable between different ocean regions, notably between the northern and southern high latitude oceans. Due to their role in deep water formation, both the northern and southern high latitude oceans are a driving factor in the Atlantic and global Cd and PO4 relation. Outside the Atlantic Ocean, the classical kink is not expected, but the relationship is by no means linear. Most likely, this is due to the interaction between low latitude surface waters and subsurface waters from high latitude origin, but more data are required to assess this in detail. (C) 2018 Elsevier B.V. All rights reserved.
机译：镉（Cd），一般不被认为是营养元素，但像在海洋中营养的行为毕竟可能在海洋生物学的重要作用。 Cd和营养磷酸盐（PO 4）之间的关系已经被研究了超过40年，但在驱动机构和原因后面的“扭结”的争论，在斜率的陡度的变化正在进行。使用精度高，从南到北覆盖了西大西洋的空间分辨率，并结合新的数据与强大的扩展最佳的多参数（EOMP）水质量模型，我们表明，不同的水团之间的混合是解释观测到的主导因素相关和扭折。通过再矿化镉再生解释了小规模的变化，特别是在海洋表面。观测暗示Cd在地表水的可用性确定将CD-摄取，因此CD：PO4再矿化比。这个比例是不同的海洋区域之间可变，特别是北部和南部高纬度海洋之间。由于其在深水中形成中的作用，无论是北部和南部高纬度海洋是在大西洋和全球Cd和PO4关系的驱动因素。外大西洋，预计不会古典扭结，但关系绝不是线性的。最有可能的，这是由于低纬度地表水和从高纬度原点地下水域之间的相互作用，但更多的数据需要详细评估这一点。 （c）2018年elestvier b.v.保留所有权利。

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