新疆艾比湖全新世以来的环境变迁与古气候

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于1990,1991年夏对新疆艾比湖湖盆地区进行调查,运用孢粉、元素地球化学、碳酸盐含量以及测年分析,对其沉积物进行研究,重建了湖区全新世古气候的演化序列。结果表明,10.2-8.0kaB.P,气候温凉偏干;8.0-3.5kaB.P,气候以温湿为主,其中7.3-6.4kaB.P.为相对稳定暖湿期;3.5kaB.P.至今,以温干为主,气候与现代相似。随着湖面波动,艾比湖保存有全新世3个不同时期高潮面遗迹,并应用水热平衡模型,对各个高潮面期的古降水量进行计算,全新世暖湿期的降水量比现今高出1/4以上,超过300mm/a,这时期湖面扩大了近3倍。 In the summer of 1990 and 1991, the lake area of ​​Aibin Lake in Xinjiang was investigated. Based on the analysis of sporopollen, elemental geochemistry, carbonate content and dating, the sediments were studied and the evolutionary sequence of Holocene paleoclimate in the lake area was reconstructed . The results show that 10.2-8.0kaB. P, cool and dry climate; 8.0-3.5kaB.P, climate is mainly warm and humid, of which 7.3-6.4kaB. P. Relatively stable warm and wet period; 3.5kaB. P. So far, mainly warm and dry, the climate and modern similar. As the lake fluctuates, Lake Aibi has three climatic relics of the Holocene at different periods, and uses the hydrothermal equilibrium model to calculate the paleo-precipitation at each climax period. The precipitation during the Holocene warm-wet period is higher than today More than 1/4, more than 300mm / a, this time the lake expanded nearly 3 times.
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