Collaborative Research: GEOTRACES N Atlantic Section, shipboard and shorebased determination of key trace elements

该奖项是根据2009年《美国复苏和再投资法案》(公法111-5)资助的。制定国际地质勘查方案是为了建立一个关键微量元素和同位素的全球框架，该框架将描述这些财产在海洋中的当代分布。然后，这些信息可用于限制生物地球化学重要元素的过程和通量的模型，以及框定通量过程和转化的关键示踪剂。来自夏威夷大学和迈阿密大学罗森斯蒂尔海洋和大气科学学院的科学家将参加首次前往北大西洋的GEOTRACES邮轮，并使用流动注射分析技术测定船上溶解的铁、铝、锰和锌的浓度。这些船上分析将使他们能够识别和纠正任何采样设备问题和/或调整采样策略，以适应水柱中的意外特征。在实验室中，将用电感耦合等离子体质谱重新分析样品中的这些元素和Cd，以校准船上的数据集，填补船上分析中的空白，并对测量的准确性/精密度提供质量控制。确定这些元素的浓度应大大提高我们对全球海洋生物地球化学循环如何运作的了解，使我们能够更准确地预测大气在向表层海洋提供具有生物地球化学意义的重要微量元素方面的作用，以及这些元素转移到海洋内部的机制。这项研究还将提供对微量元素分布对环境条件变化的敏感性的理解。作为该项目的一部分，夏威夷大学的一名博士后和罗森斯蒂尔海洋和大气科学学院的一名研究生将得到支持和培训。预计博士后和研究生将参加北大西洋多机构、多学科的GEOTRACES邮轮。

This award is funded under the American Recovery and Reinvestment Act of 2009 (Public Law 111-5).The international GEOTRACES program has been developed to produce a global framework of key trace elements and isotopes that will describe the contemporary distributions of these properties in the ocean. This information can then be used to constrain models of the processes and fluxes of biogeochemically important elements and key tracers that frame flux processes and transformations. Scientists from the University of Hawaii and the University of Miami Rosenstiel School of Marine and Atmospheric Science will participate in the first GEOTRACES cruise to the North Atlantic and determine on board ship dissolved iron, aluminum, manganese, and zinc concentrations using Flow Injection Analysis. These on board analyses would enable them to identify and rectify any sampling equipment problems and/or adapt the sampling strategy for unexpected features in the water column. In the laboratory, the samples would be reanalyzed for these elements as well as Cd by inductively coupled plasma mass spectrometry to calibrate the shipboard data sets, fill in gaps in the shipboard analyses, and provide quality control on the accuracy/precision of the measurements. Determining the concentrations of these elements should significantly improve our knowledge of how global ocean biogeochemical cycles operate, allow for a more accurate prediction of the role of the atmosphere in providing biogeochemically important trace elements to the surface ocean, and the mechanisms by which they are transferred to the interior of the ocean. This research will also provide an understanding of the sensitivity of trace element distributions to changing environmental conditions. One postdoc from the University of Hawaii and one graduate student from Rosenstiel School of Marine and Atmospheric Sciences would be supported and trained as part of this project. It is anticipated the postdoc and the graduate student would participate in the multi-institutional, multi-disciplinary GEOTRACES cruise in the North Atlantic.