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毛乌素沙漠南缘靖边海则滩湖沼相沉积剖面,真实地记录了晚冰期以来东亚季风气候和沙漠演化历史。在地层沉积相划分和测年基础上,据地球化学元素和孢粉等气候指标分析表明,该区古气候变迁序列为:12kaBP前干燥寒冷;12~10kaBP气候转暖湿;10~8.5kaBP以温湿为主,在10~9.5kaBP出现YoungerDryas冷干事件;8.5~3.0kaBP温暖湿润;3.0kaBP后气候趋于半干旱与现代气候较接近。这种气候演化规律是受地球轨道因素影响,通过东亚冬夏季风的强弱变化来实现的
The marsh-facies sedimentary section of Zebianhu Lake in the southern margin of the Muusin Desert records the history of the East Asian monsoon climate and desert evolution since the late Ice Age. Based on the division and dating of the sedimentary facies, the analysis of the climatic indicators such as geochemical elements and sporopollen showed that the paleoclimatic change sequence in this area was: dry and cold before 12ka BP, warm and wet at 12 ~ 10ka BP, and 10 ~ 8.5kaBP Mainly in warm and humid, YoungerDryas cold-dry event occurs at 10 ~ 9.5kaBP; 8.5 ~ 3.0kaBP warm and humid; After 3.0kaBP, the climate tends to be semi-arid and the modern climate is closer. The evolution of climate is affected by the Earth’s orbital factors, through the East Asian winter monsoon intensity change to achieve