Collaborative Research: Penetration of the Bomb 14C Transient in the Dissolved and Particulate Organic Carbon Pools in Two Mid-Ocean Gyres

合作研究：炸弹 14C 瞬变对两个大洋中环流溶解和颗粒有机碳库的穿透

• 批准号: 9815130
• 负责人: Ellen Druffel
• 金额: $ 40.79万
• 依托单位: University of California-Irvine
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1998
• 资助国家: 美国
• 起止时间: 1998-10-01 至 2002-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9815130&HistoricalAwards=false
• 关键词: Collaborative; Research; Penetration; Bomb; 14C

DruffelThe organic carbon generated biologically and distributed in the world ocean is intimately related to the functioning of the entire global carbon cycle as well to the ecology of the seas. The investigators on this project, who are established leaders in the study of the marine carbon cycle, will continue their research into the cycling of organic carbon in both its dissolved and particulate forms. The overall objective is to use the natural and anthropogenic radiocarbon (14C) in dissolved and particulate organic matter to estimate turnover times and reservoir sizes in the ocean. They will examine changes in the carbon reservoirs and turnover since the last measurements were made one decade ago in the North Atlantic and North Pacific basins. They will also attempt to constrain the residence time of upper ocean refractory dissolved organic carbon by surveying the 14C composition of dissolved and particulate organic matter in specific organic classes such as protein, carbohydrate, and lipids. Finally, they propose to measure 14C in bacterial nucleic acids to investigate bacterial utilization of old dissolved organic matter. The investigators anticipate that this work would lead to major new insights into the biogeochemical role played by these non-living forms of carbon in the world ocean.

Druffelthe有机碳在生物学上产生并分布在世界海洋中，与整个全球碳循环的功能以及海洋生态学的功能密切相关。 该项目的研究人员是在海洋碳循环研究中成立的领导者，将继续研究其溶解和颗粒形式中有机碳的循环。 总体目的是在溶解和颗粒有机物中使用天然和人为的放射性（14C）来估算海洋中的周转时间和储层大小。 他们将检查碳储层和营业额的变化，因为上一项测量是十年前在北大西洋和北太平洋盆地进行的。 他们还将尝试通过调查特定有机类别（例如蛋白质，碳水化合物和脂质）中溶解的有机物和颗粒有机物的14C组成来限制上海难治性溶解有机碳的停留时间。 最后，他们建议在细菌核酸中测量14C，以研究旧溶解有机物的细菌利用。 调查人员预计，这项工作将导致对这些非生命形式的碳在世界海洋中发挥的生物地球化学作用的重大新见解。