位于塔克拉玛干沙漠南缘策勒绿洲与荒漠交错带的达木沟剖面高分辨率地记录了这一区域近４ｋａ来的环境演变历史。虽然，可以反映干湿波动的Ｒｂ／Ｓｒ比值曲线明显地反映了近４ｋａ来本地区持续干旱化的特征，且有后期加剧的趋势。但年代学及剖面沉积特征的研究还表明，在此期间仍有若干次相对湿润与干旱化加剧时期的波动。 The profile of the Da Mogou section of the Cele oasis and desert ecotones on the southern margin of the Taklamakan Desert records the environmental evolution history of this area over the past 4 ka at high resolution. Although the Rb / Sr ratio curve, which can reflect wet and dry fluctuations, clearly reflects the characteristics of continued drought in this region in the past 4 ka, with a tendency of aggravating in the later period. However, the study of chronology and profile sedimentary characteristics also shows that there are still several fluctuations during the period of relative humidification and aridification.