Reactive Radionuclides in the Eastern North Atlantic, Joint Global Ocean Flux Study

北大西洋东部的活性放射性核素，全球海洋通量联合研究

• 批准号: 9016494
• 负责人: Michael Bacon
• 金额: $ 28.69万
• 依托单位: Woods Hole Oceanographic Institution
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1991
• 资助国家: 美国
• 起止时间: 1991-04-01 至 1992-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9016494&HistoricalAwards=false
• 关键词: Reactive; Radionuclides; Eastern; North; Atlantic

This proposal requests renewed funding for a study of spatial variations in the distributions and particulate fluxes of a suite of naturally occurring radioactive nuclides, which was initiated as part of the North Atlantic Bloom Experiment of the Joint Global Ocean Flux Study (JGOFS). The radionuclides that are being measured serve as ocean tracers that can yield fundamental information about the rates of biogeochemical processes that govern the scavenging of reactive chemical species and the fate of biogenic particles in the oceanic water column. The study is designed to test the hypothesis that the uptake and release of soluble chemical species by particulate matter and the formation and destruction of particle aggregates in the oceanic water column occur at rates that vary both spatially and temporally in response to variations in the rate of plankton production at the sea surface and the flux of organic matter leaving the surface layer. The data will be interpreted within the context of biological rate measurements and other data that are being collected within the international JGOFS program and will be used to test biogeochemical models. This study is expected to contribute to a better understanding of particle fluxes and dynamics in the ocean, issues that are of broad concern to marine chemistry, biology and geology.

这项提议要求为一项关于一套自然产生的放射性核素的分布和颗粒通量的空间变化的研究提供新的资金，该研究是作为全球海洋通量联合研究的北大西洋水华实验的一部分启动的。正在测量的放射性核素作为海洋示踪剂，可以提供有关生物地球化学过程的速率的基本信息，这些过程支配着对海洋水柱中活性化学物种的清除和生物起源粒子的去向。这项研究旨在检验这样一种假设，即颗粒物对可溶化学物种的吸收和释放以及海洋水柱中颗粒聚集体的形成和破坏的速度在空间和时间上都随着海面浮游生物生产速度和离开表层的有机物质通量的变化而变化。这些数据将在生物速率测量和国际JGOFS计划内收集的其他数据的背景下进行解释，并将用于测试生物地球化学模型。这项研究预计将有助于更好地了解海洋中的颗粒通量和动力学，这些问题是海洋化学、生物学和地质学广泛关注的问题。