Operation of a National Ocean Sciences Accelerator Mass Spectrometry Facility at the Woods Hole Oceanographic Institution

该合同为国家海洋科学加速器质谱仪（NOSAMS）的持续运行和维护提供资金。NOSAMS通过加速器质谱法分析碳同位素（主要是放射性碳，14C）。它还进行新的AMS放射性碳样品制备技术和加速器操作的研究和开发。自1993年起，WHOI与NSF签订合作协议（0228996,9807266,9301015），并于1989年开始在NSF的支持（8802509）下进行收购、测试和投入运行。目前的合作协议于2003年实施，每年4月1日为周年纪念日。当它开始运行时，为世界海洋环流实验（WOCE）收集的水样构成了NOSAMS分析的大部分样品，WOCE是一个主要的国际野外项目，得到了NSF的大量支持。大部分原始的WOCE放射性碳分析都是在1998-2003年合作协议的运作期间完成的。大约从2003年开始，作为气候变率（CLIVAR）和碳循环项目的一部分收集的样本，由海洋科学部的项目支持，构成了提交给NOSAMS的样本的很大一部分。对于目前的合同，计划在第一年进行大约1000次clivar相关的分析，预计NOSAMS将在未来五年内每年进行大约1000次这样的分析，这取决于NSF的持续审查和批准。该合同为NOSAMS的5年运行和维护以及持续改进测量和样品制备系统所需的各种仪器升级提供资金。

This award provides funding for continued operation and maintenance of the National Ocean Sciences Accelerator Mass Spectrometer (NOSAMS). NOSAMS carries out analysis of carbon isotopes (primarily radiocarbon, 14C) via accelerator mass spectrometry. It also carries out research and development in new AMS radiocarbon sample preparation techniques and accelerator operations. It has operated since 1993 under cooperative agreements (0228996, 9807266, 9301015) between WHOI and NSF, and was acquired, tested and put into operation with NSF support (8802509) beginning in 1989. The present cooperative agreement was implemented in 2003, and has an anniversary date of 4/1 annually. When it began operations, water samples collected for the World Ocean Circulation Experiment (WOCE), a major international field program involving very substantial NSF support, comprised the majority of samples analyzed by NOSAMS. Most of the original WOCE radiocarbon analyses were completed within the operations of the 1998-2003 cooperative agreement. Beginning in about 2003, samples collected as part of Climate Variability (CLIVAR) and Carbon Cycle programs supported by programs in the Division of Ocean Sciences have made up a significant portion of the sample submissions to NOSAMS. For the current award, approximately 1,000 CLIVAR-related analyses are planned for Year 1, and it is anticipated that NOSAMS will carry out approximately 1,000 such analyses annually for the next five years, subject to continued review and approval by NSF. This award provides funding for five years of operation and maintenance the NOSAMS and for a variety of instrumentation upgrades necessary for continued improvement of the measurements and sample preparation systems.