Ocean circulation and biological processes drive seasonal variations of dissolved Al, Cd, Ni, Cu, and Zn on the Northeast Atlantic continental margin
Ocean circulation and biological processes drive seasonal variations of dissolved Al, Cd, Ni, Cu, and Zn on the Northeast Atlantic continental margin
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海洋环流和生物过程驱动东北大西洋大陆边缘溶解的铝、镉、镍、铜和锌的季节变化
DOI：
10.1016/j.marchem.2023.104246
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发表时间：
2023
期刊：
影响因子：
3
通讯作者：
Achterberg, Eric P.
中科院分区：
文献类型：
--
作者：
Chen, Xue-Gang;Rusiecka, Dagmara;Gledhill, Martha;Milne, Angela;Annett, Amber L.;Birchill, Antony J.;Lohan, Maeve C.;Ussher, Simon;Woodward, E. Malcolm;Achterberg, Eric P.
营养盐和类营养盐溶解态微量金属（dTM）是海洋生物的基本功能，是海洋生态地球化学循环的重要组成部分。在这里，我们报告的季节分布溶解锌（dZn），镍（dNi），铜（dCu），镉（dCd），铝（dAl），和营养盐的东北大西洋大陆边缘（凯尔特海），这是全球温带陆架海的代表。地表水dTM和营养盐浓度的变化主要受生物过程的季节变化的调节。dTM（特别是dCu和dZn）和大陆架上的营养物质的化学计量另外受到河流输入。营养盐和dTM在大陆坡的深度确定的海洋环流驱动的水团混合，没有一个重要的作用，为当地的矿化过程。地中海外流沃茨对于将地中海来源的dTM输送到东北大西洋和驱动dTM特别重要：在~1000 m深度处的营养扭结。这些结果突出了河流输入的重要性，初级生产的季节性和海洋环流的营养盐和营养盐样dTM在温带大陆边缘海的分布。未来气候相关的强迫因子的变化可能会影响高生产力大陆架区域海洋生物的营养物质和dTM的可用性，从而影响区域碳循环。
Nutrients and nutrient-like dissolved trace metals (dTMs) are essential for the functioning of marine organisms and therefore form an important part of ocean biogeochemical cycles. Here, we report on the seasonal distributions of dissolved zinc (dZn), nickel (dNi), copper (dCu), cadmium (dCd), aluminum (dAl), and nutrients on the Northeast Atlantic continental margin (Celtic Sea), which is representative for temperate shelf seas globally. Variations in surface water dTM and nutrient concentrations were mainly regulated by seasonal changes in biological processes. The stoichiometry of dTMs (especially for dCu and dZn) and nutrients on the continental shelf was additionally affected by fluvial inputs. Nutrients and dTMs at depth on the continental slope were determined by water mass mixing driven by ocean circulation, without an important role for local remineralization processes. The Mediterranean Outflow Waters are especially important for delivering Mediterranean-sourced dTMs to the Northeast Atlantic Ocean and drive dTM:nutrient kinks at a depth of ~1000 m. These results highlight the importance of riverine inputs, seasonality of primary production and ocean circulation on the distributions of nutrients and nutrient-like dTMs in temperate continental margin seas. Future climate related changes in the forcing factors may impact the availability of nutrients and dTMs to marine organisms in highly productive continental shelf regions and consequently the regional carbon cycle.