Exchange processes in mountainous regions; Turbulence and stand-scale modelling

在这个子项目中，将通过实验和建模活动研究林分尺度上的物理过程，也包括部分化学过程。将利用涡旋协方差和剖面技术以及几种统计工具在森林现场和森林边缘调查下列过程：湍流通量、相干结构、足迹、大气和冠层的耦合、平流、交换系数、与化学通量的标量相似性以及所有数据和不确定性的质量控制。在该项目中，还将应用高阶闭合模型ACASA，以及土壤的气体通量模型和几种足迹模型和方法。该项目通过气象输入数据和森林内外及森林边缘复杂的湍流交换或平流过程的解释工具，支持bundle应用的所有其他项目。此外，将提供所有模式研究的强迫参数（测量和模拟数据）。与在另一个子项目中进行的LES模拟一起，将提供对林场到集水区尺度上的湍流交换过程和二次循环的完整描述。主要目的是研究受干扰的森林生态系统中通量的变化。

Within this sub-project the physical, and also in part chemical, processes on the stand scale will be studied by experimental and modelling activities. The following processes will be investigated at the forest site and at the forest edge with eddy-covariance and profile techniques and several statistical tools: turbulent fluxes, coherent structures, footprints, coupling of the atmosphere and the canopy, advection, exchange coefficients, scalar similarity to chemical fluxes, and quality control of all data and uncertainties. Within the project the higher order closure model ACASA will also be applied as well a gas flux model for the soil and several footprint models and approaches. The project supports all of the other projects of the bundle application with meteorological input data and interpretation tools for the complicated turbulent exchange or advection processes in and above the forest and at the forest edge. Furthermore, forcing parameters for all model studies (measured and modelled data) will be made available. Together with the LES simulation carried out in another subproject, a complete description of the turbulent exchange processes and of secondary circulation on the stand to catchment scale will be made available. The main aim is to investigate how the fluxes change in a disturbed forest ecosystem.