Collaborative Research: Sample Analysis to Test a Novel Method of Determining Atmospheric Deposition of Trace Elements to the Ocean/Ice System of the Arctic

合作研究：样品分析测试确定北极海洋/冰系统中微量元素大气沉积的新方法

• 批准号: 1202992
• 负责人: William Landing
• 金额: $ 3.02万
• 依托单位: Florida State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2012
• 资助国家: 美国
• 起止时间: 2012-09-01 至 2014-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1202992&HistoricalAwards=false
• 关键词: Collaborative; Research; Sample; Analysis; Test

The investigators propose to use the naturally occurring isotope beryllium-7, which is produced in the atmosphere by cosmic rays and has a 53.3-day half-life, as a tracer for estimating the atmospheric fluxes of a variety of trace elements to the surface of the Arctic Ocean. They have collected samples of snow, sea ice, surface waters, and atmospheric aerosols through an international collaboration concurrent with the preparation of this proposal. This project provides funding for the analysis of Be-7 and for trace elements including aluminum, manganese, iron, cupper, zinc, cadmium, and lead. The atmospheric input of numerous chemical species into the global ocean has been shown to equal or exceed that from river sources. In the Arctic, several contaminant elements in particular are dominated by atmospheric sources, with implications for the Arctic ecosystem and human health. The project will investigate several elements of interest to the international GEOTRACES program, which is currently formulating plans for coordinated Arctic work. The project will support a Ph.D. student who will incorporate these results into his dissertation.

研究人员建议使用宇宙射线在大气中产生的自然同位素铍-7，其半衰期为53.3天，作为估计各种微量元素到北冰洋表面的大气通量的示踪剂。在准备这项提案的同时，他们还通过国际合作收集了雪、海冰、地表水和大气气溶胶的样本。该项目为Be-7和微量元素（包括铝、锰、铁、铜、锌、镉和铅）的分析提供资金。许多化学物质在大气中输入到全球海洋的量已被证明等于或超过来自河流的量。在北极，有几种污染物主要来自大气，对北极生态系统和人类健康有影响。该项目将调查国际GEOTRACES项目感兴趣的几个要素，该项目目前正在制定协调北极工作的计划。该项目将支持一名博士生，他将把这些结果纳入他的论文中。