SGER: The Biogeochemistry of Polonium as a Marine Carbon Tracer

SGER：钋作为海洋碳示踪剂的生物地球化学

• 批准号: 9318318
• 负责人: Thomas Church
• 金额: $ 5万
• 依托单位: University of Delaware
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1993
• 资助国家: 美国
• 起止时间: 1993-08-15 至 1995-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9318318&HistoricalAwards=false
• 关键词: SGER; Biogeochemistry; Polonium; Marine; Carbon

9318318 Church Pilot experiments will be performed that will lead the way toward developing polonium and its species as an important marine tracer. These experiments include: (1) defining the volatile species of polonium in laboratory cultures, such as those that are prolific sulfur gas producers, focusing on potential alkylated species, and (2) describing polonium distribution and speciation in productive coastal (salt marshes), (shelf break), and open (for North Atlantic) surface waters, where it is known to be seasonally in excess, and fractionated in biological systems and resulting sedimentary organic material. These experiments will build on existing evidence gathered under a previous NSF sulfur grant. The significance of the experiments should lead the way to future development of polonium as a powerful tracer of carbon cycles in the upper ocean, air-sea exchange of carbon and sulfur based biogases, and carbon fluxes to underlying sediments.

小行星9318318 试点实验将进行，这将导致发展的方式，作为一个重要的海洋示踪剂的钋和它的物种。 这些实验包括： (1)定义实验室培养物中的挥发性钋物质，例如那些多产硫气体的生产者，重点关注潜在的烷基化物质， (2)描述了生产性沿海（盐沼）、（陆架断裂）和开阔（北大西洋）表层沃茨中的钋分布和形态，已知这些水域中的钋季节性过剩，并在生物系统和由此产生的沉积有机物质中分馏。 这些实验将建立在先前NSF硫拨款收集的现有证据基础上。 这些实验的重要性将为未来发展钋作为海洋上层碳循环、碳和硫基沉积物的海气交换以及碳向底层沉积物的通量的强有力示踪剂指明道路。