Collaborative Research: Net Carbon Transport and Reaction in the bottom Boundary Layer of an Upwelling Margin

合作研究：上升流边缘底部边界层的净碳传输和反应

• 批准号: 0628629
• 负责人: David Archer
• 金额: $ 16万
• 依托单位: University of Chicago
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2007
• 资助国家: 美国
• 起止时间: 2007-01-01 至 2010-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0628629&HistoricalAwards=false
• 关键词: Collaborative; Research; Net; Carbon; Transport

ABSTRACTOCE - 0628629Upwelling coastal margins are regions of intense carbon cycling, air-sea gas exchange, and redox chemistry where the sea floor, ocean interior, and air-sea interface are closely coupled. In this research, a multidisciplinary team from Oregon State University, University of Washington, University of Chicago, Princeton University, and Columbia University will conduct a coordinated study of transport and biogeochemical reaction rates within the bottom boundary layer, and of exchanges across the boundaries between coastal and open ocean; the sea surface and atmosphere; and the water column and seafloor. They hypothesize that net carbon fluxes in these settings are governed by the juxtaposition of physical transport and chemical reaction in the bottom boundary layer. They will address questions such as how much of the net community carbon production is ultimately sequestered in the ocean interior and how does this happen, how do large, fast-growing coastal diatoms responsible for the high net community production meet their iron demands, and how much mobilized iron and methane reaches illuminated depths and/or the sea-surface and outgases to the atmosphere. These goals will be accomplished with a field program off the Oregon coast that will include the following: (1) high-resolution surveys of the distributions of temperature, salinity, velocity, carbon (inorganic pCO2 and TCO2, and particulate and dissolved organic carbon), methane, and iron in the water column; (2) deliberate multiple-tracer releases in the bottom boundary layer to examine physical transport processes, illumination history, and air-sea gas exchange; (3) direct measurement using benthic flux chambers of transport between the sediments and the boundary layer; (4) measurement of reactivity of organic matter, iron and methane in the boundary layer using incubations and compound specific markers. Data-synthesis, carbon-budgeting, and modeling efforts will integrate all the field data, incorporate reaction and transport rates, and generate predictive capabilities that can extend our results to other upwelling systems. Among the broader impacts, the research will produce several technological developments that will have multi-disciplinary applications in earth science. Eight graduate students from five institutions will participate in this project, producing either master's degrees or the foundations for doctoral dissertations. Undergraduate students will participate in the laboratory and fieldwork. Outreach activities include participation of reporters and adult educators on the expeditions, as well as working with the State of Oregon's Ocean Sciences and Math Collaborative program that provides learning activities linking ocean sciences with real life issues and reaches an underserved population of adult learners.

Abstractoce-0628629 Upwelling沿海边缘是强烈的碳循环，空气气体交换和氧化还原化学的区域，海底，海洋内部和空气界面紧密耦合。 在这项研究中，来自俄勒冈州立大学，华盛顿大学，芝加哥大学，普林斯顿大学和哥伦比亚大学的一个多学科团队将对底部边界层内的运输和生物地球化学反应率进行协调研究，以及在沿海和开放海洋之间进行界限的交流；海面和大气；以及水柱和海底。 他们假设这些设置中的净碳通量受底部边界层中物理转运和化学反应并置的控制。 他们将解决诸如最终在海洋内部隔离的净社区碳生产，以及如何发生这种情况，如何使高净社区生产的大型，快速增长的沿海硅藻满足其铁的需求，以及动员的铁和甲烷的数量照亮了深度和/或海上和/或海面和/或河口和/或大气层。 这些目标将通过俄勒冈海岸的现场计划来实现，其中包括以下内容：（1）对温度，盐度，速度，碳，碳（无机PCO2和TCO2）的分布进行高分辨率调查，以及颗粒和溶解有机碳），水柱中的甲烷和铁； （2）在底部边界层中故意多重跟踪器释放，以检查物理运输过程，照明历史和气海气交换； （3）使用沉积物和边界层之间的底栖通量室进行直接测量； （4）使用孵育和化合物特定标记的有机物，铁和甲烷在边界层中的反应性测量。 数据合成，碳预算和建模工作将整合所有现场数据，结合了反应和运输速率，并产生预测能力，可以将我们的结果扩展到其他上升流域。在更广泛的影响中，该研究将产生几种技术发展，这些技术将在地球科学中具有多学科应用。 来自五个机构的八名研究生将参加该项目，培养硕士学位或博士学位论文的基础。本科生将参加实验室和野外工作。外展活动包括参与记者和成人教育者就这些探险的参与，以及与俄勒冈州的海洋科学和数学合作计划的合作，该计划提供了将海洋科学与现实生活中的问题联系起来的学习活动，并到达了成人学习者的贫困人群。