Mineral Dust and Radionuclides Over the North Atlantic

北大西洋上空的矿物尘埃和放射性核素

• 批准号: 9728983
• 负责人: Richard Arimoto
• 金额: $ 27.04万
• 依托单位: New Mexico State University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1997
• 资助国家: 美国
• 起止时间: 1997-09-01 至 2001-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9728983&HistoricalAwards=false
• 关键词: Mineral; Dust; Radionuclides; Over; North

9728983 Arimoto This project involves the study of mineral dust, a suite of trace elements, and two radionuclides (210Pb and 7Be) as part of the AEROCE Phase III Program. The studies will focus on Theme 2 (Marine Aerosols and Climate). Daily bulk aerosol samples will be collected from four sites (Bermuda, Barbados, Izana and Lanzarote), and they will be analyzed using instrumental neutron activation. The analyses will generate data for mineral dust and several chemical tracers (Se, Sb, and Zn). We also propose a continuation of studies of two radionuclides (210Pb and 7Be) at Barbados. In addition, cascade impactor samples will be collected on an intensive basis to characterize the mass particle-size distributions of mineral dust and several tracer elements; these data will also be used to characterize chloride deficits in size separated particles, The relationships among these materials and various other substances studied for AEROCE will be used to infer sources and to investigate the atmosphere transport pathways responsible for their transport. Special efforts will be made to relate the chemical data to news data on physical properties of the atmosphere that will be collected for AEROCE Theme 2.

小行星9728983 该项目涉及对矿物粉尘、一系列微量元素和两种放射性核素（210 Pb和7 Be）的研究，作为AEROCE第三阶段计划的一部分。 研究将侧重于主题2（海洋气溶胶和气候）。 每天将从四个地点（百慕大、巴巴多斯、伊扎纳和兰萨罗特）收集大量气溶胶样品，并将使用仪器中子活化法进行分析。 这些分析将产生矿尘和几种化学示踪剂（硒、锑和锌）的数据。 我们还建议在巴巴多斯继续研究两种放射性核素（210 Pb和7 Be）。 此外，还将密集收集级联撞击采样器样本，以确定矿物粉尘和若干示踪元素的质量粒度分布;这些数据还将用于确定按粒度分离的颗粒中氯化物不足的情况， AEROCE研究的这些物质和各种其他物质之间的关系将用于推断来源，并调查负责其运输的大气运输途径。 将作出特别努力，将化学数据与为AEROCE主题2收集的关于大气物理特性的新闻数据联系起来。