Collaborative Research: GEOTRACES Pacific Section - Nd isotopes and REEs in the South Pacific

合作研究：GEOTRACES 太平洋部分 - 南太平洋的 Nd 同位素和稀土元素

• 批准号: 1234191
• 负责人: Brian Haley
• 金额: $ 27.42万
• 依托单位: Oregon State University
• 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: 2013-01-01 至 2017-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1234191&HistoricalAwards=false
• 关键词: Collaborative; Research; GEOTRACES; Pacific; Section

Neodymium isotopes (Nd) and rare earth elements (REE) are recognized by the GEOTRACES program as key trace elements and isotopes (TEIs) because they trace the sources and mixing of water masses. Therefore, transport data generated by Nd measurements will potentially advance our understanding on the dominant processes that drive TEI distribution in the ocean. There is a particular need for Nd measurements in the South Pacific because current observations do not agree with GCM models. Researchers from Columbia University and Oregon State University will analyze seawater, aerosols, water column particulates, and sea-floor sediments for Nd, strontrium, and REE during the upcoming 2013 GEOTRACES cruise. Because of the geographical transect of the GEOTRACES Pacific section cruise, investigators will assess impacts made by a suite of biological, chemical, and physical processes including: boundary exchange, high productivity, surface addition from aerosols, addition to bottom waters from detached nephloid layers, particles from hydrothermal vents, reversible scavenging, and groundwater fluxes. Furthermore, within the Peru-Chili Oxygen Minimum Zone (OMZ), investigators will utilize the TEI cerium to better understand relative effects of lateral and vertical processes. By improving understanding of the distribution of TEIs, results will also enhance biogeochemical models and advance knowledge of climate systems. Broader Impacts: Research will advance careers of two young scientists, support education and training of Ph.D. and undergraduate students, and provide materials for outreach activities. Additionally, results will be published in scientific journals and all data will be submitted to the Biological and Chemical Oceanography Data Management Office.

neododmium同位素（ND）和稀土元素（REE）被Geotraces程序确认为关键的微量元素和同位素（TEIS），因为它们追踪了水质量的来源和混合。因此，通过ND测量产生的传输数据将有可能提高我们对驱动海洋中TEI分布的主要过程的理解。南太平洋特别需要ND测量值，因为目前的观察结果与GCM模型不一致。哥伦比亚大学和俄勒冈州立大学的研究人员将分析ND，Strontrium和REE的海水，气溶胶，水柱颗粒和海底沉积物，并在即将到来的2013年Geotraces Cruise期间。由于Geotraces Pacific区域巡航的地理横切，研究人员将评估由一套生物学，化学和物理过程所产生的影响，包括：边界交换，高生产率，气溶胶的表面添加，从底层层中增加了底部的底部，从底层层中增加了底部的水域，来自水热的颗粒，可逆的，可逆的，可逆的，接地水和地面效量。此外，在秘鲁 - 智利氧最小区（OMZ）内，研究人员将利用TEI掌fer层更好地理解横向和垂直过程的相对效果。通过提高对TEI分布的理解，结果还将增强生物地球化学模型并提高对气候系统的了解。 更广泛的影响：研究将提高两名年轻科学家的职业，支持博士学位的教育和培训。和本科生，并为外展活动提供材料。此外，结果将在科学期刊上发布，所有数据将提交给生物学和化学海洋学数据管理办公室。