Collaborative Research: US GEOTRACES North Atlantic Section - Nd isotope distribution: sources, sinks and internal cycling

合作研究：US GEOTRACES 北大西洋部分 - Nd 同位素分布：源、汇和内循环

• 批准号: 0926981
• 负责人: Howard Scher
• 金额: $ 16.36万
• 依托单位: University South Carolina Research Foundation
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2010
• 资助国家: 美国
• 起止时间: 2010-03-01 至 2013-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0926981&HistoricalAwards=false
• 关键词: Collaborative; Research; US; GEOTRACES; North

The objective of the US GEOTRACES program, a newly initiated international oceanographic program, is to identify processes and quantify fluxes that control the distributions of key trace elements and isotopes in the oceans and to establish an understanding of the sensitivity of these distributions to changing environmental conditions. Neodymium (Nd), a rare earth element, is supplied to the ocean via continental weathering, and its isotopes have been identified as an important ocean tracer that could potentially improve our understanding of water mass pathways, as well as identify sources and sinks of trace elements in modern and past oceans. Scientists from Columbia University, the University of South Carolina, and the University of Hawaii will be conducting a rigorous survey of the distribution of dissolved seawater Nd isotopes and concentrations along the 2010 GEOTRACES North Atlantic zonal section. Results from this study will determine how well Nd isotopes track advected water masses in marginal and open ocean settings, estimate the Nd contribution from submarine groundwater discharge, and determine atmospheric Nd input and fluxes into and out of marine sediments. This research will aid scientists in determining the oceanic distribution of Nd isotopes on a global scale. The educational impacts of this research include support for a graduate and postdoctoral student, as well as training opportunities for an undergraduate student.

美国 GEOTRACES 计划是一项新发起的国际海洋学计划，其目标是识别控制海洋中关键微量元素和同位素分布的过程和量化通量，并了解这些分布对不断变化的环境条件的敏感性。 钕 (Nd) 是一种稀土元素，通过大陆风化作用进入海洋，其同位素已被确定为重要的海洋示踪剂，可以潜在地提高我们对水团路径的理解，并确定痕量的源和汇。现代和过去海洋中的元素。 来自哥伦比亚大学、南卡罗来纳大学和夏威夷大学的科学家将对 2010 年 GEOTRACES 北大西洋地带部分溶解海水 Nd 同位素的分布和浓度进行严格的调查。 这项研究的结果将确定 Nd 同位素在边缘和开放海洋环境中跟踪平流水团的效果，估计海底地下水排放的 Nd 贡献，并确定大气 Nd 输入和进出海洋沉积物的通量。这项研究将帮助科学家确定全球范围内 Nd 同位素的海洋分布。这项研究的教育影响包括对研究生和博士后学生的支持，以及为本科生提供的培训机会。