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首页> 外文期刊>Journal of oceanography >Relationship between Cd and PO4 in the Subtropical Sea near the Ryukyu Islands
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Relationship between Cd and PO4 in the Subtropical Sea near the Ryukyu Islands

机译：琉球群岛附近的亚热带海中Cd和PO4的关系

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The relationship between dissolved cadmium (Cd) and phosphate (PO4) was examined at three stations in the subtropical area near the Ryukyu Islands in May 1999. Preformed PO4 was obtained using the Redfield ratio in order to separate the surface water and the other layers in this study area. Almost 0 μM (?0.043 μM to 0.094 μM) was estimated in the layers above 300 m and 250 m at Sts. 1 and 3 and at St. 2, respectively. Up to these depths, water was considered to be uniform, and these layers were defined as the surface water in this study area. In the surface water, the slopes of the regression lines of the Cd-PO4 plot were 0.162, 0.156, and 0.226 (nM/μM) at Sts. 1, 2, and 3, respectively, and these values were much closer to the estimated regenerated ratio of Cd to PO4 from the Apparent Oxygen Utilization (AOU)-Cd/PO4 plots, which was 0.197 (nM/μM) in this study area. Below surface layers, the slopes of the Cd-PO4 plot changed to 0.371, 0.352, and 0.362 (nM//μM) at Sts. 1, 2, and 3, respectively. In the relationships between Cd and PO4, clear deviations or kinks were observed at three stations at a PO4 concentration of approximately 0.2 μM in the plot, which was attributable to the discontinuity of surface water and the other layers across the North Pacific subtropical mode water. In studies of the interaction between surface water and biogenic particles concerning the Cd/PO4 ratio, separate analyses of seawater (surface water and the other layers) should be carried out to obtain the individual surface water ratio because the Cd/PO4 ratio in the surface water is expected to differ from that of the underlying water. Furthermore, the biological fractionation of these constituents is based on the surface water ratio.
机译：1999年5月在琉球群岛附近的亚热带地区的三个站点对溶解的镉（Cd）和磷酸盐（PO4）之间的关系进行了研究。使用Redfield比率获得预制的PO4，以分离地表水和其他层。这个研究领域。在Sts的300 m和250 m以上的层中估计接近0μM（约0.043μM至0.094μM）。 1和3，以及分别位于圣2。直到这些深度，水被认为是均匀的，这些层被定义为该研究区域的地表水。在地表水中，Cd-PO4图的回归线在Sts处的斜率分别为0.162、0.156和0.226（nM /μM）。 1、2和3，这些值更接近表观氧气利用率（AOU）-Cd / PO4图上Cd与PO4的估计再生比，在该研究区域为0.197（nM /μM） 。在表层以下，Cd-PO4曲线的斜率在Sts变为0.371、0.352和0.362（nM //μM）。 1、2和3。在Cd和PO4之间的关系中，在图中PO4浓度约为0.2μM的三个站点上观察到明显的偏差或扭结，这归因于地表水和北太平洋亚热带模式水的其他层的不连续性。在研究与Cd / PO4比有关的地表水与生物颗粒之间的相互作用时，应进行单独的海水分析（地表水和其他层）以获得单独的地表水比，因为地表中Cd / PO4的比率预期水与底层水有所不同。此外，这些成分的生物分离是基于地表水比率。

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