| 摘要: |
| 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，10.2－8.0ka B．P，气候温凉偏干；8.0－3.5ka B.P，气候以温湿为主，其中7.3－6.4ka B．P．为相对稳定暖湿期；3.5ka B．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300 mm/a，这时期湖面扩大了近3倍。 |
| 关键词: 全新世 环境变迁 水热平衡 |
| DOI： |
| 分类号: |
| 基金项目:国家自然科学基金资助项目，4880245号 |
附件 |
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| CHARACTERS OF THE EVOLUTION OF CLHVIATE AND ENVIRONMENT OF HOLOCENE IN AIBI LAKE BASIN IN XINJIANG |
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Wu Jinglu, Wang Sumin, Wang Hongdao
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Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences Nanjing 210008
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| Abstract: |
| On the basis of the basin geomorphology and lacustrine sedimentary profile of Aibi Lake investigated in summers of 1990, 1991, the sequences of climatic evolution of Holocene in the Aibi Lake basin were reconstructed by analysing the sedimentary stratigraphy, bio-stratigraphy and geochemistry, and the chronological records. The results show that, during Holocene, the general change trends of the paleoclimate in Aibi Lake area can be divided into three stages: (1) 10.2 - 8.0 ka B. P., a temperate-cool and dry climate stage. (2) 8.0 - 3.5 ka B. P., a warmer moist climate stage (especially 7.3 - 6.4 ka B. P., a relatively stable humid temperate stage). (3) 3.5 ka B. P. - present, a warm and dry stage, similar to the present climate. And lake water level fluctuation left the trails of three high-lake-level stages preserved in the lacustrine deposits of Holocene. By applying a hydrological and energy-balance model, the paleoprecipitations of these three high-lake-level stages were estimated. In the most moderate period of the climate of the Holocene in Aibi Lake region, the average precipitation was more than 300 mm/a, an increase above 1/4 of the present. At this time, the lake area was three times that of the present. |
| Key words: Holocene, Enviromnental evolution, Hydrological and energybalance |
