The measurement and use of bismuth-210 as a tracer of particle flux in aquatic systems

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项目编号	1639865
	The measurement and use of bismuth-210 as a tracer of particle flux in aquatic systems
	James Waples
主持机构	University of Wisconsin-Milwaukee
项目开始年	2016
	2016-07-01
项目结束日期	2017-06-30
资助机构	US-NSF
项目类别	Standard Grant
项目经费	83685(USD)
国家	美国
语种	英语
英文摘要	Naturally occurring radioactive nuclides provide invaluable "clocks" with which to investigate a wide range of processes in earth and environmental sciences. Nuclides with shorter half-lives are well suited to studying rapid processes, but are often present at very low concentrations and are particularly difficult to measure. The goal of this Early Concept Grant for Exploratory Research (EAGER) is to develop and demonstrate a new analytical method for measuring bismuth-210 (half life, 5 days) in lake water, seawater, and associated particles. Because bismuth tends to become associated with particles more than its parent isotope lead-210 (half life, 22 years), the bismuth-210/lead-210 daughter/parent pair can potentially be used to investigate very short time-scale processes associated with particle (sediment) formation and cycling in lakes and the coastal ocean. Knowledge about such processes is important to understanding carbon and nutrient cycling in these productive and dynamic areas. The specific goals of this exploratory project are to 1) demonstrate an improved method for measuring the lead-210/bismuth-210/polonium-210 trio in aquatic system samples; 2) measure lead-210/bismuth-210/polonium-210 in Lake Michigan; and 3) explore the feasibility of using bismuth-210/lead-210 disequilibrium as a proxy for particle flux. The project would support an undergraduate student researcher for the summer.
来源学科分类	Geosciences - Ocean Sciences
文献类型	项目
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/69709
专题	环境与发展全球科技态势
推荐引用方式 GB/T 7714	James Waples.The measurement and use of bismuth-210 as a tracer of particle flux in aquatic systems.2016.