多尺度大气边界层与陆面物理过程模式的研究进展

Multi-scale atmospheric boundary-layer and land surface physics process models

本文以大气边界层物理、大气动力学、土壤物理、水文学和生物物理等理论为基础,研发了一系列适用于不同时空尺度的大气边界层与陆面物理过程模式:(1)基于地表能量和水分平衡方程,构建了新一代北京大学陆面物理过程模式(Land Surface Physics Process Model of Peking University,LSMPKU);(2)基于城市街谷冠层结构以及相应物理过程,构建了北京大学单层城市冠层模式(Modified Single Layer Urban Canopy Model of Peking University,UCMPKU);(3)基于计算流体力学理论,构建了北京大学街区尺度模式(Block Scale Model of Peking University,BSMPKU).通过模拟研究表明:上述模式在各自的时空适用尺度上均能很好地模拟出相应尺度上的主要大气物理过程,在与其他同类模式的对比实验中表现出明显的改进和提高.

On the bases of the theories of atmospheric-boundary-layer physics, atmospheric dynamics, soil physics, fluid dynamics and biophysics, a series of atmospheric boundary layer and land surface physics process models are developed, which are applied to multiple spatial-temporal scales of earth atmospheric processes. （1） Based on land surface energy and water balance equations, the LSMPKU （Land Surface Physics Process Model of Peking University） is developed; （2） the UCMPKU （Modified Single Layer Urban Canopy Physics Process Modelof Peking University） is developed based onthe physics processesof the urban canyon canopy structures, e.g. energy balances, hydrological balances and anthropogenic heat processes; （3） the BSMPKU （Block Scale Model of Peking University） is developed with the method of （Computational Fluid Dynamics, CFD） theory. The numerical experiments showed that all the models are able to simulate the atmospheric physical process well on the certain spatial-temporal scales and had significant improvements in comparison with other similar models.