陆面过程和大气边界层相互作用敏感性实验

SENSITIVITY TESTS OF INTERACTION BETWEEN LAND SURFACE PHYSICAL PROCESS AND ATMOSPHERIC BOUNDARY LAYER

文中建立了一个研究陆面物理过程与大气边界层相互作用的模式。模拟了草原下垫面的土壤 环境物理、地面热量通量、蒸发、蒸散及大气边界层结构特征。并对主要的环境物理参数进 行了敏感性实验。结果表明，本模式能合理地模拟地表热量平衡、土壤体积含水量、植被蒸 发阻抗、地表水汽通量日变化和湍流交换系数、湍流动能、位温和比湿廓线等。该模式还可 进一步应用于研究城市陆面物理过程与大气边界层相互作用机制，及与中尺度大气模式耦合用于区域气候的研究。

An interactive model between land surface physical process and at mospheric boundary layer is established, and is used to simulate the featur es of so il environmental physics, surface heat fluxes, evaporation from soil and evapotranspiration from vegetation and structures of atmosphere boundary layer concerning the grassland underlying suface. The sensitivity experiments are enga ged in primary physic s parameters. The results show that this model can obtain a reasonable simula ting for the diurnal variations of heat balance, soil volumetric water content, re sistance of vegetation evaporation, flux of surface moisture, and profiles of tu rbulent exchange coefficient, turbulent momentum, potential temperature, and hum idity mixing ratio. The model developed can be used to study the interaction bet ween land surface processes and atmospheric boundary layer in city regions, and it can also be used in the simulation of regional climate incorporating a mesoscale model.