青藏高原是世界上最高的大高原,平均海拔为4500米,素有“世界屋脊”之称.由于青藏高原海拔高,空气稀薄,大气干洁,因而太阳幅射和日照均比同纬度地区大得多。尽管高原上温度状况的分布,也受纬度变动而有南北间的差异,但因海拔高度,下垫面状况等非地性因素影响,以至于温度不呈纬向带状分布。高原的温度和水分条件具有自西北向东南变化的特征,高原的西北部比较严寒干燥,东南部比较温暖湿 The Qinghai-Tibet Plateau is the tallest plateau in the world with an average elevation of 4,500 meters and is known as the “roof of the world.” Because of the high altitude, thin air and clean air in the Tibetan Plateau, the solar radiation and sunshine are both larger than those in the same latitude Much more. Although the distribution of temperature on the plateau is also affected by the variation of latitude, there is a difference between north and south. However, due to non-geologic factors such as altitude and underlying surface conditions, the temperature is not distributed in zonal zonal distribution. Plateau temperature and moisture conditions have changed from northwest to southeast of the characteristics of the plateau in the northwest relatively cold and dry, southeast relatively warm and wet