Dynamic Vegetation Process Of Numerical Simulation Of Regional Climate Impacts

The vegetation has important influence on climate variation. In this dissertation, by coupling the Atmosphere-Vegetation Interaction Model(AVIM) to Regional Integrate Environment Model System(RIEMS), the two-way coupling between vegetation and atmosphere has been realized in Regional Climate Mode(lRCM). The realization of two-way interaction between vegetation and atmosphere changes the status that there is only the influence of vegetation on climate, not the feedback between climate and vegetation in Regional Climate Model.Through the long-term integration using the vegetation-atmosphere two-way coupling regional climate model, we found that the RIEMS coupled with the AVIM can simulate well the distribution of temperature in China, but the magnitude has some discrepancy. The simulated temperature of RIEMS-AVIM is higher than that of RIEMS-BATS in winter, whereas small discrepancy occurs in summer. The simulated temperature in eastern China approximates much RIEMS-BATS in winter, but the simulated temperature of RIEMS-AVIM in summer is lower than that of RIEMS-BATS. The simulated temperature of RIEMS-AVIM is close to the observation, and RIEMS-AVIM improves the simulation of temperature in China.The distribution of precipitation can be simulated well using RIEMS-AVIM, but the intensity and location of rain belt shows some deviation. The simulated precipitation of RIEMS-AVIM in winter is less than that of RIEMS-BATS and observation. The simulated precipitation of RIEMS-AVIM in summer agrees that of RIEMS-BATS in eastern China, but RIEMS-AVIM weakens the overestimated center of precipitation in Tibetan Plateau and Tianshan region.The simulated Mongolia High of RIEMS-AVIM is stronger than observation in winter, and the low pressure in Tibetan Plateau is also stronger in summer. But the simulation of RIEMS-BATS is stronger than that of RIEMS-AVIM, the discrepancy...