策勒绿洲与荒漠交错带的达木沟剖面地化元素的分布及古气候意义的研究表明，虽然近四千年来气候的干旱状况持续未变，但其间仍有若干次相对湿润与干旱化加剧的波动。以 ２ ０００ａ ＢＰ为界，其前气候以相对湿润为主，而其后则以持续干旱为主要特征，且存在三次干旱化程度加剧时期，即 １５００ａ ＢＰ、１２００ａ ＢＰ和 １０００ａ ＢＰ。近四千年来本地区气候具持续干旱之特征，并有后期加剧的趋势。 The distribution of geochemical elements and the significance of palaeoclimate in the Damuogou section of the Chele oasis and desert ecotone show that although the drought condition in the climate has not changed for nearly four thousand years, there are still several relative humidities and aridification Increased volatility. With 2000a BP as the boundary, the former climate was mainly relative humidification, and then the persistent drought was the main characteristic. There were three stages of aggravation of drought, namely 1500a BP, 1200a BP and 1000a BP. In the past four millennia, the climate in this region has the characteristics of prolonged drought and there is a trend of later aggravating.