Understanding Carbon Flows Between the Euphotic Zone and 1000 m depth

了解亮光带和 1000 米深度之间的碳流

• 批准号: 9986765
• 负责人: George Jackson
• 金额: $ 39.99万
• 依托单位: Texas A&M Research Foundation
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2000
• 资助国家: 美国
• 起止时间: 2000-06-01 至 2004-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9986765&HistoricalAwards=false
• 关键词: Understanding; Carbon; Flows; Between; Euphotic

The JGOFS program is designed to understand the biological and chemical processes that move carbon from the ocean's surface to it's interior and bottom. It's focus has been the euphotic zone, the region where carbon dioxide is reduced to organic carbon as part of the photosynthetic process. Data have been collected in the sub-euphotic zone, but there has been no concerted effort to relate the processes affecting carbon distributions there, either remineralization or fluxes to the benthos. For this project, the PIs will develop a more detailed understanding of carbon flows below the euphotic zone, incorporating the role of organisms into biological models. The model results will describe carbon flows between different groups of animals and bacteria. Preliminary models suggest that the timing and magnitude of seasonal productivity can dramatically affect the amount of material that passes through on its way to the ocean bottom. The study areas include the sites of the JGOFS field programs, starting with that of the North Atlantic Bloom Experiment. The focus on the 100 - 1000 m depth region is important because large amounts of organic matter enter as particles settling out of the euphotic zone, but only small amounts exit by falling through the bottom. The project results should stimulate further studies of the sub-euphotic zone by highlighting the important processes determining the fate of oceanic primary production as well as by exposing crucial areas of ignorance. The results also will help the development of better global models of the carbon cycle. This approach should be applicable to future JGOFS studies, particularly those concerned with the fate of organic matter.

JGOFS计划旨在了解将碳从海洋表面转移到海洋内部和底部的生物和化学过程。 它的重点一直是真光层，在光合作用过程中，二氧化碳被还原为有机碳的区域。 已在真光层以下收集了数据，但尚未作出协调一致的努力，将影响那里的碳分布的各种过程联系起来，无论是矿化还是流向底栖生物的通量。 在这个项目中，研究人员将对透光层以下的碳流动有更详细的了解，将生物体的作用纳入生物模型。 模型结果将描述不同动物和细菌群体之间的碳流动。 初步模型表明，季节性生产力的时间和大小可以极大地影响到通过海底的物质的数量。 研究区域包括JGOFS现场项目的地点，从北大西洋水华实验开始。 把重点放在100 - 1000米深度区域是重要的，因为大量的有机物质作为颗粒从透光层沉降出来，但只有少量通过底部落下而离开。 该项目的结果应能通过突出决定海洋初级生产命运的重要过程以及通过揭露关键的无知领域，促进对真光层以下的进一步研究。 研究结果还将有助于开发更好的全球碳循环模型。 这种方法应适用于未来的JGOFS研究，特别是那些与有机物的命运。