Field Micrometeorological Measurements, Process-Level Studies and Modeling of Methane and Carbon Dioxide Fluxes in a Boreal Wetland Ecosystem

来自内布拉斯加大学和科罗拉多州立大学的科学家们 大学将开展一项综合研究计划， 实地微气象测量、过程研究和 北方湿地甲烷和二氧化碳通量的模拟 作为加拿大BOREAS项目的一部分。 程序 有四个组成部分： 1. 甲烷和甲烷的表面交换率的量化 北极湿地的二氧化碳 利用微气象学的涡流 相关技术 2. 甲烷和碳的变异性评价 二氧化碳通量在景观中的作用。 3. 工艺研究（现场实验操作）， 量化基质或养分限制的程度 甲烷的产生和氧化。 叶的反应 光合作用、植物呼吸和气孔导度 优势维管植物物种的数量 控制变量将通过实验量化。 4. 整合前三个组件进行测试， 改进了分解和甲烷排放模型。 现场测量将允许通量的时间变化 甲烷和二氧化碳的排放量 生物和生物物理过程。 这些测量 需要支持北方甲烷排放建模 湿地生态系统

Scientists from the University of Nebraska and Colorado State University will carry out an integrated program of research on field micrometeorological measurements, process studies and modeling of methane and carbon dioxide fluxes in a boreal wetland ecosystem, as part of the BOREAS Project in Canada. The program has four components: 1. Quantification of surface exchange rates of methane and carbon dioxide at a boreal wetland site over the course of a growing season using the micrometeorological eddy correlation technique. 2. Evaluation of the variability of methane and carbon dioxide fluxes across the landscape using chambers. 3. Process studies (field experimental manipulations) to quantify the degree of substrate or nutrient limitations of methane production and oxidation. Responses of leaf photosynthesis, plant respiration and stomatal conductance of dominant vascular plant species to relevant controlling variables will be quantified experimentally. 4. Integration of the first three components to test and improve a model of decomposition and methane emission. The field measurements will allow temporal variation in fluxes of methane and carbon dioxide to be related to underlying biological and biophysical processes. These measurements are needed to support modeling of methane emission from northern wetland ecosystems.