The model of climate change and desert evolution was somewhat due to the interaction of atmosphere from Northern Hemisphere and Southern Hemisphere, especially the anomalous air pressure in tropical Pacific region. 但又与南北半球大气相互作用,特别是赤道太平洋地区气压异常引起亚洲季风气候的不稳定有关,表现出降水变化特点,沙漠出现逆过程变化,存在短暂成壤固定时期。