大气模式中边界层和低云相互作用的动力学和计算方法之研究

On the united framework of the observation ,theoretical analysis and model verification of the atmospheric boundary layer and low clouds, the dynamical model of atmospheric boundary layer and low clouds is put forward. This model consists of the coupling the prediction scheme of the non-convective cloud, designed by the applicant, with the stable and nocturnal boundary, the coupling the super-parameteration scheme of cloud system, designed by the applicant ,with the convective boundary layer. The top of the boundary layer is determined be the coupling the partial differential equations about the boundary layer and free atmosphere with the boundary conditions on the methods of shock wave from fluid mechanics. On the basis of computation methods of shock waves ,and the differential geometry and computational geometry ,the scheme of the dynamics and computational methods is designed ,which is appropriate for the interaction between the atmospheric boundary layer and low clouds. Then, the above scheme will be coupled with the atmospheric circulation model, and the scheme will be modified gradually. The typical example, which is not modeled by the previous model, will be chosen and tested, so that the modeling ability of the new scheme will be verified.

本研究在统一的框架下以大气边界层与低云的观测,理论分析和模式验证为基础，以申请者设计的非对流云方案与稳定和中性边界层相耦合，以申请者设计的云系超级参数化方案与对流边界层相耦合，借鉴流体力学中激波处理方法来描写边界层顶，提出了大气环流模式中边界层与低云相互作用的动力学模型，在自由大气和边界层中各有不同的一套方程组，而边界条件为交换条件。以计算数学中的激波计算方法，以及微分几何和计算几何处理曲面为基础，系统得到适合大气环流中低云与边界层相互作用的动力学与计算方法。将上述方案耦合到大气环流模式中去，不断完善云与边界层相互作用的方案。选择典型个例即以前难以模拟的现象，进行试验模拟，以考察新方案对典型个例的模拟能力。

本研究在统一的框架下以大气边界层与低云的观测,理论分析和模式验证为基础，以申请者设计的非对流云方案与稳定和中性边界层相耦合，以申请者设计的云系超级参数化方案与对流边界层相耦合，借鉴流体力学中激波处理方法来描写边界层顶，提出了大气环流模式中边界层与低云相互作用的动力学模型，在自由大气和边界层中各有不同的一套方程组，而边界条件为交换条件。以计算数学中的激波计算方法，以及微分几何和计算几何处理曲面为基础，系统得到适合大气环流中低云与边界层相互作用的动力学与计算方法。将上述方案耦合到大气环流模式中去，不断完善云与边界层相互作用的方案。选择典型个例即以前难以模拟的现象，进行试验模拟，以考察新方案对典型个例的模拟能力。