| Scientific and reasonable simulation of the regional vegetation is always a focus of scientific research. In the global change and the land ecosystem research, the climatic factors is the most primary ones that decide the covered type and the distribution of vegetation, and the vegetation is the crucial reflection and symbol of the Earth climate. Therefore, the determination of the climate - vegetation relations has the vital practical significance. In order to verify the simulation accuracy of the life zone model and the spatial distribution of the Chinese latent vegetation, we have simulated the distribution of the Chinese potential vegetation and explored the spatial distribution and the rule of region differentiation based on the life zone model, which is under the support of the spatial analysis of GIS and the AML language.Five aspects of work are involved in this thesis. First, the spatial distribution of potential vegetation of China is simulated with the life-zone model. There are 28 life-zone types we receive and the simulation accuracy is 46% under the calculation of the Kappa. In all the types, the cool temperate steppe is about 1,088,000 km~2, mainly located in the line of the Yinshan- Ordos Plateau -Liupan Mountain; The warm temperate moist forest is about 1,089,000 km , which is accounting for 11.5% of the total area of China, mainly in the north of Nanling Mountain and the south of the Yangtze River region. The sub-tropical moist forest is followed by, the distribution area of 687126km~2, mainly located in the south and Yunnan-Guizhou Plateau and the south of Nanling Mountain. The smallest one is the warm temperate moist forest, covering an area of only about 1km~2, located in the Hill of the Zhejiang and Fujian. Second, based on natural geographic environment and the geographical differences of heat and water conditions, three regions are divided. They are the eastern part of the monsoon region, the arid area of northwest China region and the Qinghai-Tibet alpine region. The distribution of potential vegetation is analyzed according as the scope of latitude, elevation distribution, the scope of canton, the type of practical vegetation and the vegetation in area of China. Third, due to solar radiation, land and sea elevation differences and other factors, the rule of territorial differentiation is manifested. The strong performance of eastern areas of China is Latitudinal zonality. From south to north, the vegetation types are the coniferous forest belt-grassland- forest-steppe-forest. The distribution of vegetations is along the latitude, but sometimes it performances the intermittent or patchy distribution; In the north of China, Longitudinal zonality is mainly expressed in zonal areas, and from west to east sequence of vegetation types for the forest- grassland- grassland desertification -desertification; The Qinghai-Tibet Plateau and western tall mountains are mainly vertical zonality. With the increasing of elevation, the vegetation performance from the forests- grasslands and the desert transition to snow. Forth, the Physical Geography of China and the Chinese Academy of Sciences divide China into three regions and seven natural zones. Further 41 natural provinces are divided on the base of the life zone and the types of actual vegetation. Fifth, the accuracy of the data is in the premise of vegetation simulation precision. The use of DEM data for amendment of the spatial interpolation is used in monthly average temperature. It is not only raising the accuracy of interpolation of temperature, but also improving the simulation of the vertical zonal vegetation.
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