【摘要】 对柴达木盆地晚更新世沙漠演化过程的研究，发现青藏高原沙漠沉积中清楚地记录了新仙女木事件，并呈于冷降温的气候效应。进一步分析得出：新仙女木事件在我国不同自然气候带呈单一的干冷降温效应，并作为多模式效应。更多还原

【Abstract】 The Qaidam Basin is one of the main areas where the desert of Qinghai -Xizang Plateau distributes. According to the environment records and the age of stratigraphy in Xiaxitai section in southeast part of Qaidam Basin, this paper has concluded that the desert development, formation of the cold-dry climate, evolution of natural environment and their reverse changes occurred frequently since the late glacial. In eolian sand de posits, the Younger Dryas event clearly appears, which manifests that was a dry-cold cli matic period. Now there are two different opinions about the climatic effect of Younger Dryas. According to the predecessors’ research and the field work of the authers, it is con sidered that the Younger Dryas event not only exists in different climatic zones in China,but also manifests the unitary dry-cold climatic effect.更多还原