Trace Elements in the Atmosphere Over the North Atlantic: Concentrations, Sources, and Fluxes

北大西洋大气中的微量元素：浓度、来源和通量

• 批准号: 9013062
• 负责人: Richard Arimoto
• 金额: $ 120.33万
• 依托单位: University of Rhode Island
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1990
• 资助国家: 美国
• 起止时间: 1990-10-15 至 1995-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9013062&HistoricalAwards=false
• 关键词: Trace; Elements; Atmosphere; Over; North

Neutron activation analysis will be used to determine the concentrations of selected trace elements in atmospheric samples from the AEROCE sites. Aerosol particle samples are collected daily at Bermuda, Barbados, Tenerife, and Ireland, and the concentrations of up to twenty-five elements will be determined in each. The chemical analyses provide information on three general classes of trace constituents: mineral aerosol, atmospheric sea salt, and a variety of enriched elements. The objectives of the study are 1) to develop a chemical climatology for trace elements in aerosol particles over the North Atlantic, 2) to identify the sources for the trace elements, 3) to evaluate the export of mineral aerosol and atmospheric pollutants from the continents to the North Atlantic region, 4) to characterize the relationships among various classes of particulate trace substances in the atmosphere, 5) to investigate the mechanisms involved in the atmospheric deposition process and to improve estimates of the air/sea exchange rates for trace elements, 6) to evaluate the role of air/sea exchange in the biogeochemical cycling of trace elements in the ocean, and 7) to ascertain the impacts of particulate trace elements on physical properties of the atmosphere.

中子活化分析将用于确定 大气样品中某些微量元素的浓度 从AEROCE网站。 收集气溶胶粒子样本 每天在百慕大，巴巴多斯，特内里费岛，和爱尔兰，和 将测定多达25种元素的浓度 在每一个 化学分析提供了三种信息 痕量成分的一般类别：矿物气溶胶， 大气海盐和各种富集元素。 的 研究的目标是：1）发展化学气候学 在北大西洋上空的气溶胶微粒中的微量元素， 2)确定微量元素的来源，3）评估 矿物气溶胶和大气污染物的输出 大陆到北大西洋地区，4）表征 各种微粒痕量之间的关系 大气中的物质，5）研究机制 参与大气沉积过程， 微量元素的海气交换率估计数，6）至 评估海气交换在海洋地球化学中的作用 海洋中微量元素的循环，以及7）确定 颗粒微量元素对土壤物理性质的影响 大气层