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

海洋中铁的地球化学的最新研究已经引起了人们对大气来源的生物活性元素（包括铁、锌、钴和铜）在表层海水中的形态、有机络合和生物有效性的相互作用的兴趣。结合计划中的实地考察到中西部太平洋（NSF OCE-0117917-措施，登陆和切割），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，这些技术对表层海水中发现的元素Fe，Co，Zn和Cu的亚纳摩尔浓度非常敏感。竞争配体平衡实验沿着与电化学研究中使用的灵敏伏安溶出分析一起使用，将提供有机配体结合强度的相对指示，所述有机配体是在表面浮游植物大量繁殖期间产生的，还是在大气降水或干沉降中发现的

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