BE/CBC: Land-Water Interaction at the Catchment Scale: Linking Biogeochemistry and Hydrology

BE/CBC：流域尺度的土地-水相互作用：生物地球化学与水文学的联系

• 批准号: 0439620
• 负责人: Marc Stieglitz
• 金额: --
• 依托单位: Georgia Tech Research Corporation
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2004
• 资助国家: 美国
• 起止时间: 2004-01-01 至 2008-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0439620&HistoricalAwards=false
• 关键词: CBC; Land; Water; Interaction; Catchment

The project will involve an interdisciplinary study at the Arctic Long-Term Ecological Research site that will use existing, state-of-the-art models of hydrology and biogeochemistry, and improve them with field studies of critical processes of plant production, microbial decomposition, and production rates of dissolved substances in soil water. The models will be eventually linked to determine how soil moisture, spatial connectivity, and the timing of meteorological drivers impact carbon-nitrogen cycling and catchment export. Dr. Stieglitz, and co-PIs, Drs. Griffin (Columbia), Hobbie (Marine Biological Laboratory, Woods Hole), Kling (Michigan), and Schimel (UCSB), will analyze C-N cycling at the catchment scale to answer questions related to element coupling, impact of strength and synchronicity of external forcing, and impacts of spatial heterogeneity of vegetation and hydrological connectivity. The PIs expect this research to advance understanding of land-use changes and eutrophication of coastlines, climate change and altered ecosystem function, and global processes such as sea-ice and deep water formation in the Arctic ocean.This project is supported by the Biocomplexity in the Environment: Coupled Biogeochemical Cycles research program.

该项目将涉及在北极长期生态研究地点进行跨学科研究，该研究将使用现有的最先进的水文学和地球化学模型，并通过对植物生产、微生物分解和土壤水中溶解物质生产率的关键过程进行实地研究来改进这些模型。这些模型最终将被连接起来，以确定土壤湿度、空间连通性和气象驱动因素的时间如何影响碳氮循环和集水区输出。Stieglitz博士和合作PI，Griffin博士（哥伦比亚），Hobbie（海洋生物实验室，伍兹霍尔），Kling（密歇根州）和Schimel（UCSB）将分析流域尺度的C-N循环，以回答与元素耦合，外部强迫的强度和同步性的影响以及植被和水文连通性的空间异质性的影响有关的问题。该研究项目得到了“环境中的生物复杂性：耦合的生物地球化学循环”研究项目的支持。该研究项目的目的是促进对土地利用变化和海岸线富营养化、气候变化和生态系统功能改变以及海冰和北冰洋深水形成等全球过程的理解。