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洛川地区倒数第二次间冰期磁化率与孢粉资料分析表明:248.1~236.1 ka BP气候温暖湿润,236.1~215.4 ka BP气候变得相对干冷;215.4~188.7 ka BP为该时期最湿热的阶段,其年均温比现今高5℃左右,年均降水量高300 mm左右。洛川地区气候变化与全球性气候变化具有一致性,但也存在地区差异。S2-1包括孢粉Ⅴ、Ⅵ带,对应于MIS7a的湿热期,S2-2包括孢粉带Ⅱ、Ⅲ、Ⅳ,对应于MIS7b~7d气候转为干冷期,S2-3与孢粉带Ⅰ和MIS7e相一致,其中在S2-2阶段,223.2~218.7 ka BP时期的增温事件与孢粉Ⅲ带和MIS7c相对应。黄土高原地区各剖面磁化率特征表现出极高的一致性,而与东部沿海地区存在着一些差异,原因可能是季风三角的不同地区受夏季风的影响强弱不同造成的。
The data from the penultimate interglacial susceptibility and sporopollen analysis in Luochuan area show that the climate in 248.1-236.1 ka BP is warm and humid, and the climate in 236.1-215.4 ka BP becomes relatively dry and cold; 215.4-188.7 ka BP is the most damaging phase in this period , Its annual average temperature is about 5 ℃ higher than today and the average annual precipitation is about 300 mm high. There is consistency between climate change in Luochuan and global climate change, but there are also regional differences. S2-1 includes sporopollen Ⅴ and Ⅵ belts corresponding to MIS7a wet and hot periods, S2-2 includes sporopollen belts Ⅱ, Ⅲ and Ⅳ, corresponding to MIS7b ~ 7d climates turning to dry and cold periods, S2-3 and sporopollen zone Ⅰ And MIS7e. In S2-2, the warming events from 223.2 to 218.7 ka BP correspond to sporopollen Ⅲ and MIS7c. The magnetic susceptibility of each section in the Loess Plateau shows a very high consistency, but there are some differences with the eastern coastal areas. The reason may be that different regions of the monsoon triangle are affected by the influence of the summer monsoon.