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首页> 外文期刊>Journal of Asian earth sciences >Changes in the Asian monsoon climate during the late last interglacial recorded in oxygen isotopes of a stalagmite from the Yongxing Cave, central China
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Changes in the Asian monsoon climate during the late last interglacial recorded in oxygen isotopes of a stalagmite from the Yongxing Cave, central China

机译：中国中部永兴洞石笋的氧同位素记录的末次间冰期末亚洲季风气候变化

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摘要

The last interglacial contains information about how climate behaves during a warm period comparable to the current interval. However, there is no consensus on the key signatures and force of the last interglacial climate changes at present. Here we present a high-resolution stalagmite oxygen isotope record from central China, which spans from 123.3 to 116.8 ka. The stalagmite delta O-18 time-series bears a resemblance to changes in Northern Hemisphere summer insolation before the demise of the last interglacial, like the condition during the Holocene. Superimposed on the long-term delta O-18 record is a pronounced shift to more positive values at around 121.6 ka, indicating a switch of the Asian monsoon mean state into a weaker condition. This monsoon shift correlates with a decrease in the mean state of the South American Summer Monsoon, and a well-known abrupt mid-Eemian cooling event at high latitudes. These correlations indicate broad-scale features of the climate shift over the warm last interglacial. Another positive delta O-18 shift of up to 3.5 parts per thousand occurred at around 120 ka, representing the demise of the last interglacial Asian monsoon. By comparing the stalagmite delta O-18 records against changes in ice volume and summer insolation during the last interglacial and recent Holocene, respectively, we conclude that the decreasing Northern Hemisphere summer insolation dominated the rapid demise of the last interglacial in the Asian monsoon region.
机译：最后一个冰间期包含有关气候的信息，该气候在可与当前间隔相当的温暖时期表现如何。但是，目前对最后一次冰期间气候变化的关键特征和作用力尚无共识。在这里，我们呈现了来自中国中部的高分辨率石笋氧同位素记录，范围为123.3至116.8 ka。石笋三角洲O-18的时间序列类似于最后一个冰期消亡之前北半球夏季日照的变化，如全新世时期。长期三角洲O-18记录叠加了一个明显的变化，即在121.6 ka附近向更正值转移，表明亚洲季风平均状态已转为较弱状态。季风变化与南美夏季风的平均状态下降以及在高纬度地区发生的著名的中埃米尔突然降温事件有关。这些相关性表明最后一个暖间冰期的气候变化具有广泛的特征。大约在120 ka左右发生了另一个高达18千分之几的O-18正三角洲O-18位移，代表了最后一个冰期间亚洲季风的消亡。通过将石笋三角洲O-18记录分别与最后一次冰间期和最近全新世期间冰量的变化和夏季日照的变化进行比较，我们得出结论，北半球夏季日照量的减少主导了亚洲季风区最后一次冰期的快速消亡。

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  • 来源
    《Journal of Asian earth sciences》 |2019年第1期|211-218|共8页
  • 作者

    Zhang Weihong; Zhang Zhenqiu; Liao Zebo; Wang Yi; Chen Shitao; Shao Qingfeng; Wang Yongjin;

  • 作者单位

    Zhejiang Normal Univ, Coll Geog & Environm Sci, 688 Yingbin Rd, Jinhua 321004, Zhejiang, Peoples R China;

    Nanjing Normal Univ, Sch Life Sci, Nanjing 210023, Jiangsu, Peoples R China|Nanjing Normal Univ, Coll Geog, Nanjing 210023, Jiangsu, Peoples R China;

    Nanjing Normal Univ, Coll Geog, Nanjing 210023, Jiangsu, Peoples R China;

    Univ Sussex, Dept Geog, Brighton BN1 9RH, E Sussex, England|Univ Sussex, Sch Global Studies, Brighton BN1 9RH, E Sussex, England|Tsinghua Univ, Inst Global Change Studies, Dept Earth Syst Sci, Beijing 100084, Peoples R China;

    Nanjing Normal Univ, Coll Geog, Nanjing 210023, Jiangsu, Peoples R China;

    Nanjing Normal Univ, Coll Geog, Nanjing 210023, Jiangsu, Peoples R China;

    Nanjing Normal Univ, Coll Geog, Nanjing 210023, Jiangsu, Peoples R China;

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  • 正文语种 eng
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  • 关键词

    Insolation forcing; Asian monsoon; Stalagmite; Eemian; Paleoclimatology;

    机译：日射强迫;亚洲季风;石笋;艾美期;古气候;

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