Attaining Ecological Understanding at the Regional Level: The Kuparuk River as a Model Arctic System

9318529霍比这项研究是ARCS LAII研究的一部分，将在库帕鲁克河源头的阿拉斯加北极地区进行。它包括四个部分：(1)测量从地下水/陆地到溪流和湖泊的碳、二氧化碳和有机物质的通量，最后是二氧化碳进入大气的通量(将在查平项目的帮助下进行校准)；(2)测量库克帕鲁克河中营养物质(PO4、NO3、NH4)以及溶解和颗粒有机物的浓度，以计算进入海洋的通量；(3)改进了通用生态系统模型(GEM)，将厌氧条件和磷循环包括在内，以了解和预测植被、土壤和碳循环的变化对二氧化碳和甲烷向大气转移的相互作用；以及(4)改进了陆地生态系统模型(TEM)，将永久冻土包括在土壤水分计算中，以便对植被/土壤和大气之间的二氧化碳交换做出空间上明确的区域估计。***

9318529 Hobbie The research, a part of the ARCSS LAII Study, will take place in arctic Alaska in the headwaters of the Kuparuk River. There are four parts: (1) the measurements of flux of carbon as CO2 and organic matter from groundwater/land to streams and lakes and eventually, in the case of CO2, to the atmosphere (calibrations to be carried out with the help of the Chapin project); (2) the measurement of the concentration of nutrients (PO4, NO3, NH4) and dissolved and particulate organic matter in the Kukparuk River in order to calculate flux to the ocean; (3) the enhancement of a General Ecosystem Model (GEM) to include anaerobic conditions and phosphorus cycling in order to understand and predict the interactions of variations in vegetation, soil, and carbon cycling on CO2 and methane transfer to the atmosphere; and (4) the enhancement of a Terrestrial Ecosystem Model (TEM) to include permafrost in the soil moisture calculations in order to make spatially explicit regional estimates of CO2 exchange between vegetation/soil and the atmosphere. ***