Collaborative Research: Interactive Influences of Atmospheric Deposition and Phytoplankton Blooms on Trace Metal Speciation

近年来，海洋铁的生物地球化学研究引起了人们对大气源生物活性元素（铁、锌、钴和铜）对这些微量金属在表层海水中的形态、有机络合和生物利用度的相互作用的兴趣。与计划中的西太平洋中部实地考察（NSF OCE-0117917-测量、着陆和切割）相结合，这项合作研究工作将采用一系列基于电化学和质谱的分析技术，对表层海水中发现的铁、钴、锌和铜元素的亚纳摩尔浓度非常敏感。竞争配体平衡实验的使用以及电化学研究中使用的灵敏伏安溶出分析将提供有机配体结合强度的相对指示，这些有机配体是在浮游植物表面繁殖期间产生的，还是在大气降水或干沉积中发现的

ABSTRACTOCE-0136977OCE-0136298Recent investigations of the biogeochemistry of iron in the ocean has spurred interest in the interaction of atmospherically sourced bioactive elements including iron, zinc, cobalt and copper on the speciation, organic complexation and bioavailability of these trace metals in surface seawater. In conjunction with a planned field expedition to the central western Pacific (NSF OCE-0117917- Measures, Landing and Cutter) this collaborative research effort will employ a range of electrochemical and mass spectrometric based analytical techniques uniquely sensitive to the sub-nanomolar concentrations of the elements Fe, Co, Zn and Cu found in surface seawater. The use of competitive ligand equilibration experiments along with the sensitive voltammetric stripping analyses used in the electrochemical studies will provide relative indication of the binding strength of organic ligands either produced during surface phytoplankton blooms or found in atmospheric precipitation or dry deposition