Turbulent Fluxes and thermal convection in a valley

该项目将研究COPS实验期间大气和下垫面之间的能量交换，这对于理解非共光学对流的发展是必不可少的。一项主要任务是对所有通量站点的表面通量测量及其对足迹和可能的内部边界层的依赖进行质量控制。第二项任务是确定从山谷开始的自由对流情况及其对土地利用和山谷宽度的依赖。用大涡模拟的方法研究了河谷和整个边界层对流的形成。这使得人们可以将山谷中的对流与中尺度模式的网格尺度联系起来。

The proposed project will investigate the energy exchange between the atmosphere and the underlying surface during the COPS experiment, which is essential to understand the development of the non-synoptical convection. A main task is the quality control of surface flux measurements for all flux sites and its dependence on the footprint and possible internal boundary layers. The second task is the identification of situations with free convection starting in the valley and its dependency on land use and width of the valley. The formation of the convection in the valley and the whole boundary layer will be studied with large eddy simulation. This allows one to relate the convection in the valley with the grid scale of meso-scale models.