In this study, we have investigated the evolution of concentrations and isotope ratios of dissolved nickel (Ni), copper (Cu), and zinc (Zn) from the North Equatorial Current in the western North Pacific to the Kuroshio in the East China Sea, where the inputs of anthropogenic and lithogenic materials through riverine and aeolian pathways are relatively high. The concentrations and isotope ratios for Ni, Cu, and Zn in the deep water of the East China Sea are similar to those of the western North Pacific. The concentrations of Ni, Cu, and Zn in the Changjiang diluted water (<34.0 of salinity) are 3.0–4.1 nmol/kg, 2.0–2.7 nmol/kg, and 0.5–1.1 nmol/kg, respectively, which are significantly higher than those in the surface water of the western North Pacific, thereby indicating the impact of the riverine input. In the Changjiang diluted water, isotope ratios of Ni range from +0.8 to +1.4‰, which is lower than +1.7‰ observed in the surface water (<150 m) of the western North Pacific. The distribution of concentrations and isotope ratios for dissolved Ni fit with simple mixing among the three endmembers, Changjiang diluted water, Kuroshio surface water, and deep water in the western North Pacific. A mixing model using isotope ratios and concentrations for Ni quantitatively evaluates the sources of dissolved Ni in the East China Sea. The ranges of the isotope ratios are +0.4 to +0.5‰ for Cu and −0.1 to +0.2‰ for Zn in the Changjiang diluted water, which are similar to those in the surface water of the Okinawa Trough but lower than those in the distal ocean, such as the central Pacific. Compared with published data from the global ocean, dissolved Ni, Cu, and Zn are isotopically lighter in the surface water of some coastal regions than in the pelagic regions, indicating that isotopically light Ni, Cu, and Zn are supplied from the continents.

在这项研究中，我们研究了从北太平洋西部的北赤道洋流到东海黑潮的溶解镍 (Ni)、铜 (Cu) 和锌 (Zn) 的浓度和同位素比的演变，其中通过河流和风成通道的人为和成岩物质的输入相对较高。东海深水Ni、Cu、Zn的浓度和同位素比与北太平洋西部相似。长江稀释水（盐度<34.0）中Ni、Cu和Zn的浓度分别为3.0~4.1 nmol/kg、2.0~2.7 nmol/kg和0.5~1.1 nmol/kg，显着高于北太平洋西部地表水中的那些，从而表明河流输入的影响。在长江稀释的水中，Ni的同位素比范围为+0.8至+1.4‰，低于在北太平洋西部地表水（<150 m）中观测到的+1.7‰。溶解镍的浓度和同位素比分布符合长江稀释水、黑潮地表水和北太平洋西部深水三个端元的简单混合。使用 Ni 同位素比和浓度的混合模型定量评估了东海溶解 Ni 的来源。长江稀释水中Cu的同位素比值范围为+0.4～+0.5‰，Zn的同位素比值范围为-0.1～+0.2‰，与冲绳海槽表层水相近，但低于远端海洋，例如太平洋中部。与来自全球海洋的已发表数据相比，溶解的 Ni、Cu、