Collaborative Research: Seawater Inorganic and Organic Carbon Measurements for the US GEOTRACES Eastern Pacific Zonal Transect

合作研究：美国 GEOTRACES 东太平洋地带样带的海水无机和有机碳测量

基本信息

批准号：
1235024
负责人：
Craig Carlson
金额：
$ 16.46万
依托单位：
University of California-Santa Barbara
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2013
资助国家：
美国
起止时间：
2013-02-01 至 2016-01-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1235024&HistoricalAwards=false
关键词：
Collaborative Research Seawater Inorganic Organic

项目摘要

Scientists from Bermuda Institute of Ocean Sciences and the University of California, Santa Barbara, plan to collect samples during the 2013 GEOTRACES Eastern Pacific Zonal Transect cruise and analyze them for dissolved inorganic carbon, dissolved organic carbon (DOC), and total alkalinity. The resultant data will be highly precise and accurate to allow calculation of pH and seawater carbonate chemistry (e.g., hydroxide, carbonate ion, saturation sate for calcium carbonate minerals). Given the influence of pH on redox chemistry, speciation, and ligand-particle-trace metal/isotope interactions, the transect from Peru to Tahiti with its range of marine seawater carbonate chemistry will provide an opportunity to test the hypotheses that (1) pH is a critical constraint for controlling distributions of trace elements and their isotopes (TEIs) and their dynamics within the water column, and; (2) DOC interacts with TEIs providing a spectrum of binding ligands that influence trace element solubility, complexation, and speciation. Also, because the cruise track will pass over the East Pacific Rise, the scientists plan to evaluate DOC variability within the hydrothermal plume and determine the partitioning of organic matter between DOC and particulate organic carbon. In collaboration with other GEOTRACES researchers, the data will be used to assess the speciation of iron, copper, cobalt and mercury, as well as determine the removal rate of DOC from the surface ocean with the help of chlorofluorocarbon data obtained by a collaborator from the University of Miami, Rosenstiel School of Marine and Atmospheric Science. As regards broader impacts, this project would result in a high quality data set that would benefit not only the GEOTRACES community to help them interpret their trace metal and isotope measurements but other scientists involved in organic/inorganic carbon cycle research as well. One graduate student from the University of California, Santa Barbara would be supported and trained as part of this project.

百慕大海洋科学研究所和加利福尼亚大学圣塔芭芭拉分校的科学家计划在2013年地理位置上收集样品，东太平洋区域区域横断面巡航，并分析溶解的无机碳，溶解的有机碳（Doc）和总碱度。所得数据将高度精确且准确，以允许计算pH和海水碳酸盐化学（例如氢氧化物，碳酸盐离子，碳酸钙矿物质饱和剂）。鉴于pH对氧化还原化学，物种形成和配体粒子跟踪金属/同位素相互作用的影响，从秘鲁到塔希提河的样带及其海洋海水碳酸盐化学范围将提供一个机会，可以测试（1）pH是对痕量元素和其同位素（TEIS）（TEIS）（TEIS）（TEIS和TEIS）的关键约束（1）pH值的假设（（2）DOC与TEI相互作用，提供了影响痕量元素溶解度，络合和物种形成的一系列结合配体。此外，由于巡航轨道将越过东太平洋的上升，因此科学家计划评估水热羽流中的DOC变异性，并确定DOC和颗粒有机碳之间有机物的分配。该数据将与其他Geotraces研究人员合作评估铁，铜，钴和汞的形态，并在迈阿密大学（Rosenstiel of Miami of Marine and Mastioneric Science of Miami of Miami of Miami of Miami School of Miami and Matizateric Science of Miami School of Miami School of Miami and Matizationic Science获得的合作者获得的氯氟化合物数据的帮助下，都确定了DOC从Surface Ocean中的去除率。关于更广泛的影响，该项目将导致高质量的数据集，这不仅将使Geotraces社区有助于解释其痕量金属和同位素测量值，还可以使参与有机/无机碳循环研究的其他科学家受益。一名来自加利福尼亚大学圣塔芭芭拉分校的研究生将作为该项目的一部分得到支持和培训。