The North Pacific Ocean is located at the end of the thermohaline circulation of deep water. This study reports on basin-scale full-depth sectional distributions of total dissolvable (td), dissolved (d), and labile particulate (lp) Cd, Ni, Zn, and Cu along three transects: the GEOTRACES transects GP18 (165°E) and GP02 (47°N), and along 160°W. We find that scavenging is an important factor that significantly affects the distributions of dZn, dNi, and dCu, of which the magnitude of influence increases in the order of Cd < Ni, Zn < Cu. The relationships between the four dissolved metals with Si(OH)₄ and PO₄ differed considerably from those in other oceans. The spot concentration ratio of dCd/PO₄ was 0.34 ± 0.02 nmol/μmol (n = 296) in waters >800 m deep, which is in the range of the phytoplankton Cd/P ratio. This is indicative of the dominant effect of water circulation and biological processes on dCd distribution. The dissolved metals (dMs) to PO₄ ratios of other examined metals were either partially or completely outside the range of typical biomass ratios. They generally increased with depth in waters >800 m deep; the magnitude of increase was the highest for Cu and moderate for Ni and Zn. Below 800 m, an increase in the apparent oxygen utilization from 150 to 300 μmol/kg was concurrent with a decrease in the dMs/PO₄ ratios: 4 ± 3% for Cd, 21 ± 4% for Zn, 21 ± 3% for Ni, and 69 ± 7% for Cu.

中文翻译：

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北太平洋 Cd、Ni、Zn 和 Cu 的剖面分布模式：与养分的关系和清除的重要性

北太平洋位于深水温盐环流的末端。本研究报告了沿三个断面的总可溶解 (td)、溶解 (d) 和不稳定颗粒 (lp) Cd、Ni、Zn 和 Cu 的盆地尺度全深度剖面分布：GEOTRACES 横断面 GP18 (165°E ) 和 GP02 (47°N)，沿 160°W。我们发现清除是显着影响 dZn、dNi 和 dCu 分布的重要因素，其影响程度按 Cd < Ni、Zn < Cu 的顺序增加。四种溶解金属与 Si(OH) ₄和 PO ₄之间的关系与其他海洋中的关系大不相同。dCd/PO ₄点浓度比为 0.34 ± 0.02 nmol/μmol ( n = 296) 在 >800 m 深的水域中，在浮游植物 Cd/P 比率范围内。这表明水循环和生物过程对 dCd 分布的主要影响。其他检测金属的溶解金属 (dMs) 与 PO _{4 的}比率部分或完全超出了典型的生物质比率范围。在>800 m 深的水域中，它们通常随着深度的增加而增加；Cu 的增加幅度最大，Ni 和 Zn 的增加幅度适中。在 800 m 以下，表观氧利用率从 150 μmol/kg 增加到 300 μmol/kg，同时 dMs/PO ₄比率降低：Cd 为 4 ± 3%，Zn 为 21 ± 4%，对于Ni，Cu 为 69 ± 7%。