Large Area Estimates of Carbon Fluxes in Arctic Landscapes

该项目是对北极系统科学（ARCSS）陆地/大气/冰相互作用（LAII）研究的重大贡献。拟议的研究将确定CO2和水，动量和能量通量在三个空间尺度（情节，景观和中尺度）使用室，塔为基础的涡动相关技术，和飞机为基础的涡动相关技术。 从这些技术中获得的信息将进行分析和比较，特别是在定义最有效的方法来估计大空间尺度的二氧化碳通量在北极。 遥感光谱指数，地理信息系统，过程模型和现象学模型将被用来开发一种方法，有效地估计生态系统CO2通量在中尺度和全球尺度。1993-1996年期间将对这些方法的适用性进行初步测试。 这项研究将得出所研究地区（阿拉斯加中东部北坡）目前的CO2通量、景观中各种要素对CO2通量的贡献、净生态系统CO2通量对改变的环境条件的敏感性、预测北极CO2通量的模型和方法以及估计中尺度和全球尺度CO2和其他痕量气体通量的有效技术。

This project is a significant contribution to the Arctic System Science (ARCSS) Land/Atmosphere/Ice Interactions (LAII) study. The research proposed will determine CO2 and water, momentum, and energy fluxes at three spatial scales (plot, landscape, and mesoscale) using chamber, tower-based eddy correlation techniques, and aircraft-based eddy correlation techniques. The information obtained from each of these techniques will be analyzed and compared, especially in light of defining the most efficient approaches for estimating large spatial scale CO2 flux in the arctic. Remotely sensed spectral indices, GIS, process model, and phenomenological models will be used to develop a methodology for efficiently estimating ecosystem CO2 flux over meso- and global scales. Initial testing of the applicability of these methods will be undertaken during the 1993-1996. The research will yield the current CO2 flux for the area studied (east central north slope of Alaska), the contribution to CO2 flux of various elements of the landscape, the sensitivity of net ecosystem CO2 flux to altered environmental conditions, models and methodology to predict CO2 flux in the Arctic and efficient techniques for estimating meso- and global scale CO2 and other trace gas fluxes.