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Based on the simulations of the topographic parameters(mean orientation,slope,and terrain screenangle)in a hilly land,discussion is made term by term of the technique for modelling of all components isdone in the surface radiation balance over a rugged terrain,thus presenting a computer model for each com-ponent.In terms of experimental data,the components is calculated for the mesh grids of 100m×100 meach over 3.0×3.5 km~2 in the Zhaogongling,southern Dabie Mountains and a map is prepared showingthe distribution of these components for January and July.Results show that the hilly-land surface radiationfield matches the terrain element field quite well,which reveals the determining function of the latter,withorientational effect dominant in winter and terrain screen effect most significant in summer.The simulationtechnique presented is in principle applicable to the calculation for a radiation field in any kind of topogra-phy,thus providing a means for further exploration of hilly-land climate resource.
Based on the simulations of the topographic parameters (mean orientation, slope, and terrain screenangle) in a hilly land, discussion is made term by term of the technique for modeling of all components isdone in the surface radiation balance over a rugged terrain, thus presenting a computer model for each com- ponent. In terms of experimental data, the components are calculated for the mesh grids of 100m × 100 meach over 3.0 × 3.5km ~ 2 in the Zhaogongling, southern Dabie Mountains and a map is prepared for the distribution of these components for January and July.Results show that the hilly-land surface radiationfield matches the terrain element field quite well, which reveals the determining function of the latter, withorientational effect dominant in winter and terrain screen effect most significant in summer. the simulationtechnique presented is in principle applicable to the calculation for a radiation field in any kind of topogra-phy, thus providing a means for further exploration of hilly-la nd climate resource.