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

该项目将涉及北极长期生态研究场地的一项跨学科研究，该研究将使用现有的最先进的水文学和生物地球化学模型，并通过对植物生产、微生物分解和土壤水中溶解物质的产生率等关键过程的实地研究来改进这些模型。这些模型最终将被联系起来，以确定土壤湿度、空间连通性和气象驱动因素的时机如何影响碳-氮循环和集水区出口。Stieglitz博士和合作者Griffin博士(哥伦比亚大学)、Hobbie博士(海洋生物实验室，伍兹霍尔)、Kling(密歇根大学)和Schimel博士(UCSB)将分析流域尺度上的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。PIS希望这项研究能够促进对土地利用变化和海岸线富营养化、气候变化和改变的生态系统功能，以及北冰洋海冰和深水形成等全球过程的了解。该项目得到了环境中的生物复杂性：耦合生物地球化学循环研究计划的支持。

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.