Collaborative Research: Determining the Present and Future Ocean Carbon Dynamics in the Chukchi Sea and pan-Arctic Ocean: A Contribution to Shelf-Basin Interactions (SBI) Phase III

合作研究：确定楚科奇海和泛北冰洋当前和未来的海洋碳动态：对陆架盆地相互作用（SBI）第三阶段的贡献

• 批准号: 0732082
• 负责人: Dennis Hansell
• 金额: $ 10.58万
• 依托单位: University of Miami
• 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: 2007-09-01 至 2011-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0732082&HistoricalAwards=false
• 关键词: Collaborative; Research; Determining; Present; Future

As a contribution to SBI phase III efforts, it is critical to improve both our understanding of the Arctic Ocean carbon cycle and predictive capabilities for future responses to environ-mental changes. This requires data integration, synthesis, and modeling activities that lead to new system-level understanding of present and future carbon cycling in the Arctic Ocean. A central hypothesis to be tested in this research is that:H. The physical forcing (e.g., sea-ice, nutrient supply) and biological responses exert fundamentally different controls on the carbon cycle and the rates air-sea CO2 exchange, NCP and export production in the Chukchi Sea compared to other shelves.This project will compile organic and inorganic carbon data, and rate measurements (e.g., 234Th/238U export) collected during SBI phase II with other hydrographic, biogeochemical and carbon datasets from across the Arctic. Incorporation of these datasets provides a pan-Arctic context for understanding carbon dynamics in the present and under climate change scenarios (e.g., changes in sea-ice melt, river input, stratification, and biological responses). Specific objectives that will test the central hypothesis, include:Objective 1: Determine stocks of inorganic and organic carbon in the Chukchi Sea and pan-Arctic (including anthropogenic CO2);Objective 2: Determine rates, including air-sea CO2 gas exchange, net community production, and export production on the Chukchi and other shelves, and in the adjacent Arctic Ocean basin;Objective 3: Synthesize rates and stocks using carbon mass balance approaches. This effort includes comparative analyses of the Chukchi shelf with other shelves (carbon cycling on inflow versus interior shelves) and anticipated changes in the Arctic carbon cycle. These analyses will advance understanding through collaborative synthesis and modeling efforts, and, national and international coordination through workshop meetings in 2008 and 2010.

作为对履行机构第三阶段工作的贡献，提高我们对北冰洋碳循环的理解和对未来气候变化反应的预测能力至关重要。这需要数据集成，合成和建模活动，从而导致对北冰洋当前和未来碳循环的新的系统级理解。在本研究中要检验的一个中心假设是：H。物理强迫（例如，与其他大陆架相比，北极海冰、营养物供应）和生物反应对楚科奇海的碳循环和海气CO2交换速率、NCP和出口生产产生根本不同的控制。234 Th/238 U输出）与来自整个北极的其他水文、地球化学和碳数据集一起收集。这些数据集的整合为理解当前和气候变化情景下的碳动态提供了一个泛北极背景（例如，海冰融化、河流输入、分层和生物反应的变化）。目标1：确定楚科奇海和泛北极地区的无机碳和有机碳储量目标2：确定楚科奇和其他大陆架以及邻近北冰洋海盆的速率，包括海气CO2气体交换、净群落生产量和出口生产量;目标3：使用碳质量平衡方法综合排放率和储存量。这项工作包括对楚科奇大陆架与其他大陆架进行比较分析（流入大陆架与内部大陆架的碳循环），以及北极碳循环的预期变化。这些分析将通过协作综合和建模工作以及通过2008年和2010年的讲习班会议进行的国家和国际协调来增进了解。