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

合作研究：C-14 炸弹瞬态对两个大洋中环流溶解和颗粒有机碳库的穿透

• 批准号: 9810669
• 负责人: James Bauer
• 金额: $ 39.43万
• 依托单位: College of William & Mary Virginia Institute of Marine Science
• 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=9810669&HistoricalAwards=false
• 关键词: Collaborative; Research; Penetration; Bomb; 14

ABSTRACTThe 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.

摘要世界海洋生物产生的有机碳及其分布与整个全球碳循环的功能密切相关，也与海洋生态密切相关。该项目的研究人员是海洋碳循环研究领域的领军人物，他们将继续研究溶解形式和颗粒形式的有机碳循环。总体目标是利用溶解有机物和颗粒有机物中的自然和人为放射性碳（14C）来估计海洋中的周转时间和储层大小。他们将研究自10年前在北大西洋和北太平洋盆地进行最后一次测量以来碳储层和周转量的变化。他们还将尝试通过测量特定有机类别（如蛋白质、碳水化合物和脂类）中溶解和颗粒有机物质的14C组成来限制上层海洋难溶有机碳的停留时间。最后，他们建议测量细菌核酸中的14C，以研究细菌对旧溶解有机物的利用。研究人员预计，这项工作将对这些非生物形式的碳在世界海洋中所起的生物地球化学作用产生重大的新见解。