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从内蒙古伊盟盐海YaO2孔氧碳同位素资料中可以看到:东亚季风气候在22 000aBP时由第四纪末次冰期气候开始转入末次间冰期气候。东亚季风带第四纪末次冰期时的气候环境是湿冷的淡化期。而末次间冰期的气候环境是热干的成盐期。其次,末次冰期以来,气候由湿冷转变为热干,5400aBP时气候达到热干的大暖期的最热点。之后又逐级降至现代暖趋冷的气候特征。东亚季风气候带的末次间冰期开始界线在22 000aBP左右。δ18O资料告诉我们内蒙古高原第四纪末次冰期曾有过冰川或冰盖地貌景现,在22000aBP以后才消融进入第四纪末次间冰期。
According to the Oxygen and Carbon Oxygen Isotope data of YaO2 in Yanhai, Inner Mongolia, we can see that the East Asian monsoon climate started to migrate to the last inter-glacial climate at the age of 22 000 bBP from the end of the first glacial period of Quaternary. The climate of the East Asian monsoon zone during the last glacial period of the Quaternary period is a damp and cold desalination period. The climatic climate in the last interglacial period is a hot dry salinization period. Second, since the last ice age, the climate changed from wet to dry and 5400 aBP when the climate reached the hottest hot season. Then gradually reduced to modern warm cold climatic characteristics. The beginning of the last inter-glacial period in the East Asian monsoon climate zone is around 22 000 bps. The δ18O data tells us that glaciers or ice sheet landscapes were observed in the last glacial stage of the Quaternary in the Inner Mongolia Plateau and only melt into the last interglacial period of the Quaternary after 22000aBP.