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    最后4个冰期旋回中国黄土记录的东亚冬季风变化

    孙有斌 安芷生

    孙有斌, 安芷生, 2002. 最后4个冰期旋回中国黄土记录的东亚冬季风变化. 地球科学, 27(1): 19-24.
    引用本文: 孙有斌, 安芷生, 2002. 最后4个冰期旋回中国黄土记录的东亚冬季风变化. 地球科学, 27(1): 19-24.
    SUN You-bin, AN Zhi-sheng, 2002. Variation of the East Asian Winter Monsoon Recorded by Chinese Loess during the Last Four Glacial-Interglacial Cycles. Earth Science, 27(1): 19-24.
    Citation: SUN You-bin, AN Zhi-sheng, 2002. Variation of the East Asian Winter Monsoon Recorded by Chinese Loess during the Last Four Glacial-Interglacial Cycles. Earth Science, 27(1): 19-24.

    最后4个冰期旋回中国黄土记录的东亚冬季风变化

    基金项目: 

    国家重点基础研究发展规划项目 G1999043401

    国家自然科学基金项目 49823001

    国家自然科学基金项目 49972056

    详细信息
      作者简介:

      孙有斌(1973-), 男, 博士后, 2000年于中国科学院地球环境研究所获博士学位, 现在中国科学院海洋研究所从事海洋沉积与古环境研究.E-mail: sunyb@ms.qdio.ac.cn

    • 中图分类号: P53

    Variation of the East Asian Winter Monsoon Recorded by Chinese Loess during the Last Four Glacial-Interglacial Cycles

    • 摘要: 开展高分辨率的黄土记录研究, 是揭示过去气候变迁和变率的主要途径.选择黄土高原中部的灵台和赵家川剖面, 对L5以上的黄土-古土壤序列进行了石英颗粒的提取和粒度分析.结果表明, 石英粗颗粒(> 43μm) 体积分数变化揭示了最后4个冰期旋回东亚冬季风存有的快速变化特征, 并同深海氧同位素记录具有良好的对应关系; 然而, 在每一个冰期时段, 石英粗颗粒体积分数的变化幅度和频率存有较大差异, 可能意味着对应的冰期下垫面状况和气候系统内部的非线性响应机制并不相同.值得注意的是由石英粗颗粒体积分数反映的东亚冬季风变化, 在某些时段不仅同磁化率记录的夏季风变化不协调, 而且同深海氧同位素记录存有明显差异.深入研究这种由不同代用指标反映的古气候变化间的差异, 对理解黄土记录的全球性意义显得尤为重要.

       

    • 图  1  中国黄土的分布和剖面位置

      Fig.  1.  Map showing distribution of Chinese loess and locations of three loess-palaeosol profiles

      图  2  灵台和赵家川剖面的磁化率、石英粗颗粒体积分数随深度变化曲线及其与ODP677氧同位素记录对比

      粒度曲线为3点滑动平均结果; L1—L5.黄土层命名; S0—S4.古土壤层命名; 1, 5, 7, 9, 11.深海氧同位素层数

      Fig.  2.  Variations of magnetic susceptibility and coarse quartz volume fraction against depth and their correlation to oxygen isotope record of ODP site 677

      图  3  石英粗颗粒体积分数变化的时间序列与深海氧同位素曲线对比(粒度曲线为3点滑动平均结果)

      Fig.  3.  Time series of coarse quartz volume fraction and its comparison with marine δ (18O) curve

      图  4  末次冰期石英粗颗粒体积分数记录的冬季风不稳定性及其与北大西洋和格陵兰冰心的古气候记录对比

      φB.N.Pachyderma (s.) 的体积分数.a.灵台剖面; b.赵家川剖面; c.洛川剖面; d.GISPⅡ冰心; e.北大西洋V23-81孔

      Fig.  4.  Winter monsoon instability recorded by coarse quartz volume fraction and their correlation with palaeoclimate records from the North Atlantic and Greenland ice core during the last glaciation

      图  5  0.13~0.45 Ma时段石英粗颗粒体积分数记录的东亚冬季风的变率Fig. 5 Variability of the East Asian winter monsoon recorded by coarse quartz volume fraction in the interval of 0.13-0.45 Ma

      Fig.  5.  Variability of the East Asian winter monsoon recorded by coarse quartz volume fraction in the interval of 0.13-0.45 Ma

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    • 收稿日期:  2001-03-20
    • 刊出日期:  2002-01-25

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