Behavior of Colloidal 234Th, 210Pb and 210Po in the Coastal Ocean

沿海海洋中胶体 234Th、210Pb 和 210Po 的行为

• 批准号: 9633571
• 负责人: James Murray
• 金额: $ 47.05万
• 依托单位: University of Washington
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1996
• 资助国家: 美国
• 起止时间: 1996-11-15 至 2001-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9633571&HistoricalAwards=false
• 关键词: Behavior; Colloidal; 234Th; 210Pb; 210Po

The naturally-occurring radionuclids Th234, Pb210, and Po210 have in the past proven to be useful as tracers of particles dynamics in the marine water column, especially so for the estimation of the vertical flux of particulate organic matter. In this project, investigators at the estimation of the vertical flux of particulate organic matter. In this project, investigators at the University of Washington will study how these radiotracers interact with colloidal organic matter (i.e., organic material traditionally, if somewhat artificially, defined as being smaller than particulate but larger than dissolved material) in the coastal waters of Santa Barbara Basin. After isolating and chemically characterizing the colloidal organic matter, the investigators will determine how these two isotopes are partitioned been particulate, colloidal, and dissolved phases. The results are expected to lead to a better kinetic understanding of the role colloidal material plays in the generation of particulates and in the marine geochemistry of tracer isotopes.

天然存在的放射性核素Th 234、Pb 210和Po 210在过去已被证明可用作海洋水柱中颗粒动力学的示踪剂，特别是用于估计颗粒有机物的垂直通量。 在本项目中，研究者们致力于颗粒有机物垂直通量的估算. 在这个项目中，华盛顿大学的研究人员将研究这些放射性示踪剂如何与胶体有机物相互作用（即，有机物质，传统上，如果有些人为，定义为小于颗粒但大于溶解物质）在圣巴巴拉盆地的沿海沃茨。 在对胶体有机物进行分离和化学表征后，研究人员将确定这两种同位素如何被分配到颗粒、胶体和溶解相。 预计结果将导致更好的动力学了解胶体物质的作用，在生成微粒和示踪同位素的海洋地球化学。