GEOTRACES Pacific section: Dissolved and particulate concentrations of selected anthropogenic radionuclides along the U.S. GEOTRACES Peru-Tahiti zonal section
GEOTRACES 太平洋部分:美国 GEOTRACES 秘鲁-塔希提岛地带部分的选定人为放射性核素的溶解浓度和颗粒物浓度
基本信息
- 批准号:1235233
- 负责人:
- 金额:$ 38.87万
- 依托单位:
- 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 2018-09-30
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
The International GEOTACES Program is a global study of the marine biogeochemical cycles of trace elements and their isotopes (TEIs). In 2006, the GEOTRACES Science Plan defined the mission of GEOTRACES to be "To identify processes and quantify fluxes that control the distribution of key trace elements and isotopes in the ocean and to establish the sensitivity of these distributions to changing environmental conditions". To achieve this mission, the Science Plan further sets one of the primary goals to be the determination of the global ocean concentration and speciation of TEIs as well as the biological, chemical, and physical processes governing their distribution. Anthropogenic radionuclides (i.e., those associated with nuclear energy production and defence activities) are included in the Science Plan as "parameters of interest".In this project, a research team at the Lamont-Dougherty Earth Observatory of Columbia University will measure water column concentrations of 239Pu, 240Pu, 237Np, and 137Cs in dissolved and particulate phases along the 2013 US GEOTRACES Pacific zonal section from Peru to Tahiti. For much of the study region, these will be baseline vertical profiles of these radionuclides; that is, very few (if any) data on their distribution are currently available. These same anthropogenic radionuclides will also be measured in surface sediments at a few selected sites. Where possible, the team will compare the 2013 data to measurements made in 1972-1973, thus obtaining a four-decade perspective on processes controlling the distribution and fate of these substances.Broader Impacts: This project will feature international collaboration with other marine radiochemists. It will also include agressive educational outreach to undergraduate and high school students to advance public understanding of environmental radioactivity.
国际GEOTACES计划是对微量元素及其同位素(TEIs)的海洋生物地球化学循环的全球性研究。2006年,GEOTRACES科学计划将GEOTRACES的任务定义为“确定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,并确定这些分布对不断变化的环境条件的敏感性”。为了完成这一任务,科学计划进一步确定了其中一个主要目标,即确定全球海洋中tei的浓度和物种,以及控制其分布的生物、化学和物理过程。人为放射性核素(即与核能生产和国防活动有关的放射性核素)已作为“有关参数”列入科学计划。在这个项目中,哥伦比亚大学lammont - dougherty地球观测站的一个研究小组将沿着2013年美国GEOTRACES太平洋区域从秘鲁到塔希提岛测量溶解态和颗粒态的239Pu、240Pu、237Np和137Cs的水柱浓度。在研究区域的大部分地区,这些将是这些放射性核素的基线垂直剖面;也就是说,目前关于它们分布的数据非常少(如果有的话)。还将在几个选定地点的地表沉积物中测量这些相同的人为放射性核素。在可能的情况下,该团队将把2013年的数据与1972-1973年的测量数据进行比较,从而获得40年来控制这些物质分布和命运的过程的观点。更广泛的影响:该项目将与其他海洋放射化学家开展国际合作。它还将包括对大学生和高中生进行积极的教育推广,以提高公众对环境放射性的认识。
项目成果
期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
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Timothy Kenna其他文献
Timothy Kenna的其他文献
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{{ truncateString('Timothy Kenna', 18)}}的其他基金
GEOTRACES Arctic Section: Improving understanding of controls on the distributions of selected anthropogenic radionuclides in the Amerasian Basin
GEOTRACES 北极部分:增进对美亚盆地选定人为放射性核素分布控制的了解
- 批准号:
1439319 - 财政年份:2015
- 资助金额:
$ 38.87万 - 项目类别:
Standard Grant
RAPID: Anthropogenic radionuclides in the Atlantic Ocean 4 decades after GEOSECS
RAPID:GEOSECS 4 年后大西洋中的人为放射性核素
- 批准号:
1012154 - 财政年份:2010
- 资助金额:
$ 38.87万 - 项目类别:
Standard Grant
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