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通过三门峡地区小刘寺剖面黄土- 古土壤序列磁化率曲线和粗颗粒组分含量曲线的研究,发现它们分别指示的夏季风和冬季风变迁在末次冰消期向全新世转变时的新仙女木事件中显示不同的变化特征。夏季风的加强过程对应于冬季风的大幅度波动,气候为凉湿背景上的冷湿与暖湿振荡。冰后期的早期为全新世第一暧期。夏季风强盛对应于冬季风衰弱的湿暖气候,它由夏季风锋面降水的穿时性所决定,在华北地区为全新世适宜期。8 kaBP 前后为夏季风偏弱对应于冬季风偏强的干冷气候,是具有普遍意义的全新世第一冷期。这3 次古季风事件可与格陵兰冰芯记录进行较好的对比。
Through the study of the magnetic susceptibility curves of loess-paleosol sequences and the contents of coarse-grained components in the Xiaoliu-Si Section of the Sanmenxia area, it is found that the changes of summer monsoon and winter monsoon, respectively, during the transition from the last ice age to the Holocene, Events show different changing characteristics. The strengthening process of the summer monsoon corresponds to the drastic fluctuation of the winter monsoon. The climate is the cold, wet and warm and wet oscillation on the cool and wet background. The early ice period is the first warm period of the Holocene. The strong summer monsoon corresponds to the weak warm-humid climate of the winter monsoon, which is determined by the time-passing of the summer monsoon frontal rainfall and suitable for the Holocene in North China. The weaker summer monsoon around 8 kaBP corresponds to the stronger dry-cold climate of the winter monsoon, which is the first Holocene cold period of universal importance. These three ancient monsoon events can be compared well with Greenland ice core records.