A PRELIMINARY NUMERICAL STUDY ON THE SURFACE HEAT BALANCE FIELD IN THE HILLY AREA

Starting from the surface energy balance equation based upon the numerical simulations of the topographic parameters (mean orientation,slope and terrain screen angle) and the calculated surface radiation field in the hilly area,a zero-dimensional surface energy balance model is formulated,which is then employed to find the thermal regime through the calculation done on 100m×100 m grids within the 3.0 km×3.5 km domain over the Zhaogongling in the southern part of the Dabieshan Mountains in terms of the measurements obtained during the experiment and from the nearby station,whereupon the distributions of the components of the heat balance are mapped for the region in view.Resuits show that the surface heat balance field is in good coordination with the terrain elements that exhibit decisive effect.