Collaborative Research: US GEOTRACES Pacific Section - Measurement of the organic complexation of dissolved iron, copper and cobalt, and total dissolved cobalt

合作研究：美国 GEOTRACES 太平洋部分 - 溶解铁、铜和钴的有机络合以及总溶解钴的测量

• 批准号: 1233733
• 负责人: Katherine Barbeau
• 金额: $ 21.7万
• 依托单位: University of California-San Diego Scripps Inst of Oceanography
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2013
• 资助国家: 美国
• 起止时间: 2013-03-01 至 2018-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1233733&HistoricalAwards=false
• 关键词: Collaborative; Research; US; GEOTRACES; Pacific

Dissolved iron (Fe), copper (Cu), and cobalt (Co) are essential elements for phytoplankton growth which in turn influences the marine carbon cycle; however, despite this important role, the cycling, distribution, and bioavailability of these bioactive elements remains poorly understood. For example, strong organic ligands influence bioavailability and solubility, but it is unclear how interactions change throughout the water column under variable conditions. Recognizing a need for this data, researchers from the Bermuda Institute of Ocean Sciences, Woods Hole Oceanographic Institution, and Scripps Institute of Oceanography will measure the organic complexation of dissolved Fe, Cu, and Co as well as total dissolved Co concentrations during the 2013 GEOTRACES cruise which will transect the coastal upwelling zone off Peru, an intense oxygen minimum zone, the East Pacific Rise hydrothermal plume, and the oligotrophic waters near Tahiti. This study will result in a significant dataset on the speciation of these bioactive elements throughout the water column which will help assess the relationships between dissolved Fe, Cu, and Co distributions and ligand concentration gradients and will likely reveal large chemical gradients over this dynamic oceanographic region. As regards dissolved Co concentrations, these measurements should provide new insights on the marine biogeochemistry of the element, especially in relation to oxygen minimum zones and hydrothermal plumes. In terms of the broader impacts, for the outreach efforts, the researchers plan to disseminate results from their work to the public via the web, during tours at the Bermuda Institute of Ocean Sciences (BIOS), and at the annual BIOS Marine Science Service Day open house, as well as through a five-part webinar series produced in collaboration with the Center for Ocean Sciences Education Excellence-Ocean Systems at the University of Maine and classroom curricula. One graduate student from Woods Hole Oceanographic Institution and one graduate student from Scripps Institute of Oceanography would be trained and supported as part of this project.

溶解的铁（Fe），铜（Cu）和钴（CO）是浮游植物生长的重要因素，进而影响海洋碳循环。然而，尽管有这一重要作用，这些生物活性元素的循环，分布和生物利用度仍然很少。 例如，强的有机配体会影响生物利用度和溶解度，但尚不清楚在可变条件下整个水柱中的相互作用如何变化。认识到对这些数据的需求，来自百慕大海洋科学研究所，伍兹孔海洋学机构和Scripps海洋学研究所的研究人员将衡量溶解的Fe，Cu和CO的有机络合物以及在2013年期间的全面溶解CO浓度大溪地附近的贫营养水。 这项研究将导致有关整个水柱中这些生物活性元素形成的重要数据集，这将有助于评估溶解的Fe，Cu，CO分布与配体浓度梯度之间的关系，并可能在这个动态海洋学区域揭示大型化学梯度。 关于溶解的CO浓度，这些测量值应提供有关该元素的海洋生物地球化学的新见解，尤其是与氧最小区域和水热羽相关。 In terms of the broader impacts, for the outreach efforts, the researchers plan to disseminate results from their work to the public via the web, during tours at the Bermuda Institute of Ocean Sciences (BIOS), and at the annual BIOS Marine Science Service Day open house, as well as through a five-part webinar series produced in collaboration with the Center for Ocean Sciences Education Excellence-Ocean Systems at the University of Maine and classroom curricula. 该项目的一部分将对伍兹孔海洋学机构的一名研究生和斯克里普斯海洋学研究所的一名研究生进行培训和支持。