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

中子活化分析将用于确定来自AEROCE站点的大气样品中选定的微量元素的浓度。每天在百慕大、巴巴多斯、特内里费岛和爱尔兰收集气溶胶粒子样本，并在每个样本中测定多达25种元素的浓度。化学分析提供了三大类微量成分的信息：矿物气溶胶、大气海盐和各种富集元素。本研究的目的是：(1)建立北大西洋上空气溶胶颗粒中微量元素的化学气候学；(2)确定微量元素的来源；(3)评估矿物气溶胶和大气污染物从各大洲向北大西洋地区的输出。4)表征大气中各类微量颗粒物质之间的关系；5)研究大气沉积过程中涉及的机制，改进对大气/海洋微量元素交换速率的估计；6)评价大气/海洋交换在海洋微量元素生物地球化学循环中的作用。7)确定颗粒物微量元素对大气物理性质的影响。

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.