OPERATION OF A NATIONAL OCEAN SCIENCES ACCELERATOR MASS SPECTROMETRY FACILITY AT THE WOODS HOLE OCEANOGRAPHIC INSTITUTION

伍兹霍尔海洋研究所国家海洋科学加速器质谱设施的运行

• 批准号: 1239667
• 负责人: Mark Kurz
• 金额: $ 601.36万
• 依托单位: Woods Hole Oceanographic Institution
• 依托单位国家: 美国
• 项目类别: Cooperative Agreement
• 财政年份: 2013
• 资助国家: 美国
• 起止时间: 2013-04-01 至 2019-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1239667&HistoricalAwards=false
• 关键词: OPERATION; NATIONAL; OCEAN; SCIENCES; ACCELERATOR

The Division of Ocean Sciences at NSF provides base support for the operation and maintenance of the National Ocean Sciences Accelerator Mass Spectrometer (NOSAMS) facility. The facility will provide natural level radiocarbon dating services to the oceanographic community. Radiocarbon is an important tool in climate, carbon cycle, and biogeochemical science. It is useful as a chronometer covering the past ~50,000 years, it is a diagnostic of past changes in the carbon cycle, it serves as a tracer of ocean circulation, and it is a probe for carbon flow in the environment. Thus radiocarbon measurements are used in many sectors of ocean science research ranging from paleoceanography, physical oceanography, biogeochemistry, and climate change science. Current environmental level radiocarbon measurements require careful sample processing that minimizes contamination risk and other experimental artifacts, and the use of Accelerator Mass Spectrometry (AMS) systems. Consequently, it is advantageous to have and maintain a central facility that serves the broader ocean sciences community by making such measurements and acting as a center of expertise, as well as sustaining and advancing the state-of-the-art in such measurements.Over the past decade and more, there has been a steady growth in sample submissions to NOSAMS. Presently the facility analyzes about 7,900 samples per year, 1,000 for the Climate Variability and Predictability (CLIVAR) program and 6,900 for other clients (550-600 batch submissions annually from ~270 different investigators). Sample submission information is entered through a web portal, samples are tracked through all stages of processing and analysis using a robust, scalable, and secure database management system, and clients have secure and convenient access to sample processing status and analytical results through the web. The PI?s propose to continue operations for another five years, while gradually increasing the numbers of samples analyzed each year, improving the accuracy and precision of measurements, and expanding the methodology in new directions.The PI?s propose to continue to improve and develop new radiocarbon measurement capabilities and propose to expand the portfolio of services offered to the community. Recent advances include high precision radiocarbon measurements on carbonates, and the development of a unique gas-accepting ion source for continuous flow AMS (GIS-CFAMS) which can be coupled to a variety of different interfaces, leading to new measurement capabilities. Proposed research includes new inroads into compound specific and compound class radiocarbon analysis, as well as extending analyses to smaller samples.Broader Impacts: The research enabled by the NOSAMS measurements addresses questions that are important to society: among them issues of past and future global climate change, local and regional environmental impacts, and the development of natural resources. In addition to supporting socially relevant research, NOSAMS will play an important role in training and mentorship of graduate students and postdoctoral researchers. NOSAMS promotes general public understanding of radiocarbon and related scientific issues through web sites and in hosting tours for the visiting public.

NSF的海洋科学师为国家海洋科学加速器质谱仪（NOSAMS）设施的运营和维护提供了基本支持。该设施将为海洋学社区提供自然水平的放射性碳年代约会服务。放射性碳是气候，碳循环和生物地球化学科学中的重要工具。它是涵盖过去约50，000年的计时仪表有用的，它是碳循环过去变化的诊断，它是海洋循环的示踪剂，并且是环境中碳流量的探测。因此，放射性碳测量值在海洋科学研究的许多领域都使用，包括古海洋学，物理海洋学，生物地球化学和气候变化科学。当前的环境水平放射性碳测量需要仔细的样品处理，以最大程度地减少污染风险和其他实验伪像，并使用加速器质谱（AMS）系统。因此，拥有和维护一个中央设施是有利的，可以通过进行这种测量并充当专业知识中心，并维持和推进此类测量中的最先进的方法，从而为更广泛的海洋科学社区提供服务。目前，该设施每年分析约7,900个样本，气候可变性和可预测性（CLIVAR）计划为1,000个，其他客户为6,900个客户（每年550-600个批量提交，来自约270名不同的研究人员）。通过Web门户输入示例提交信息，使用可靠，可扩展和安全的数据库管理系统在处理和分析的所有阶段都会跟踪样品，并且客户可以通过Web安全且方便地访问样本处理状态和分析结果。 PI建议将继续运营五年，同时逐渐增加每年分析的样本数量，提高测量的准确性和精度，并在新方向上扩展方法。PI建议继续提高和开发新的放射性碳测量能力，并开发新的放射性碳测量能力，并建议扩展服务的服务Forpfolio提供服务的服务。为服务提供了服务。最近的进步包括对碳酸盐的高精度放射性碳测量值，以及连续流动AMS（GIS-CFAM）的独特气体离子源的开发，可以将其耦合到各种不同的界面，从而导致新的测量能力。拟议的研究包括对复合特定和复合类的放射性碳分析的新侵害，以及将分析扩展到较小的样本。Boader的影响：NOSAMS测量启用的研究解决了对社会很重要的问题：其中包括过去和未来的全球气候变化，地方和地区的环境环境的影响，自然资源的发展以及自然资源的发展。除了支持与社会相关的研究外，NOSAMS还将在研究生和博士后研究人员的培训和指导中发挥重要作用。 NOSAMS通过网站以及为访问公众托管游览，促进了公众对放射性碳和相关科学问题的一般理解。