Predicting equations of main factors affecting regional climate in the"Three-North" Protective Forest Area

The relationship between the change of forest resources and climatic factor in the "Three-North" region of China were studied in this paper. The predicting equations of climatic factor (dependent variable) with regional independent variable (longitude, latitude and altitude) and stand independent variable (forest coverage rate),were developed by extensively using the linear and nonlinear regression methods. With these models, we can calculate the ecological benefit of Shelter-belt forest.