NUMERICAL SIMULATION OF LAND SURFACE PROCESS AND ATMOSPHERE BOUNDARY LAYER STRUCTURE OVER SMALL HILL UNDERLYING SURFACE

A modified parameterized method of land surface physical process and a 3-dimensional transfer model are used for simulating features of surface heat flux, surface temperature, temperature profile, humidity profile, turbulence energy and so on over a small hill underlying surface.The result show s that the wind field is affected by the topography, also the turbulence transfer is affected, and the influence make the atmospheric temperature near g round surface behind the hill higher than that in front of the hill.The result is reasonable and the simulation is satisfactory.In addition, the model can also be used for other homogeneous and inhomogeneous terrain and mesoscale model.