Est#alishment of an Ocean Sciences Accelerator Facility at Woods Hole Oceanographic Institution

美东时间

• 批准号: 8802509
• 负责人: Glenn Jones
• 金额: $ 646.6万
• 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: 1989
• 资助国家: 美国
• 起止时间: 1989-01-01 至 1993-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8802509&HistoricalAwards=false
• 关键词: Est#alishment; Ocean; Sciences; Accelerator; Facility

The Woods Hole Oceanographic Institution will establish a service-oriented facility to analyze radiocarbon samples on behalf of the ocean sciences community. The Accelerator Mass Spectrometry (AMS) Facility will use newly developed techno- logy, modern instrumentation and automated sample preparation procedures. The Facility is required to analyze radiocarbon and other tracer samples collected during upcoming field programs of major Global Geosciences projects and individual research grants. Chemical tracers are powerful tools for describing oceano- graphic processes. The analysis of several natural and anthropogenic chemical constituents of seawater, such as Carbon-14, provides information on long-term mixing and circulation in the deep ocean, on upwelling, and on air-sea carbon dioxide exchange processes. These processes have major implications for understanding the forces that affect climate variability and the chemical interaction of the carbon cycle and biological productivity. The description of processes such as these is central to major oceanographic investigations planned for the next decade. AMS technology reduces required sample size by a factor of 1,000, to 250 milliliters of seawater, for achieving the requisite level of precision to define the geophysical processes under investigation. Given the large number of samples needed for the World Ocean Circulation Experiment (WOCE), the Global Ocean Flux Study (GOFS), and other geo- sciences programs, the AMS Facility will be operated on a 24- hour a day basis to meet scientific requirements. Present plans call for the analysis of up to 4,000 C-14 samples annually with precision of +/- 0.3 percent to 0.4 percent. The Institution will provide cost-sharing in terms of engineering and architectural drawings and will construct the required laboratory addition to house the AMS Facility.

伍兹霍尔海洋研究所将建立一个面向服务的设施，代表海洋科学界分析放射性碳样。加速器质谱学(AMS)设施将使用新开发的技术、现代仪器和自动样品制备程序。该设施被要求分析在即将到来的全球重大地球科学项目和个人研究拨款的实地计划期间收集的放射性碳和其他示踪剂样本。化学示踪剂是描述海洋图解过程的有力工具。对海水的几种天然和人为化学成分的分析，如碳14，提供了关于深海长期混合和循环、上升流以及海-气二氧化碳交换过程的信息。这些过程对于理解影响气候变异性以及碳循环和生物生产力的化学相互作用的力量具有重大影响。对这类过程的描述是未来十年计划进行的重大海洋调查的核心内容。AMS技术将所需的样本量减少了1000倍，至250毫升海水，以达到确定正在调查的地球物理过程所需的精度水平。鉴于世界海洋环流实验(WOCE)、全球海洋通量研究(GOFS)和其他地球科学项目需要大量样本，AMS设施将全天24小时运行，以满足科学要求。目前的计划要求每年分析多达4,000个C-14样品，精确度为+/-0.3%至0.4%。该机构将提供工程和建筑图纸方面的费用分摊，并将建造所需的实验室扩建，以容纳AMS设施。