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首页> 外文期刊>Journal of Asian earth sciences >Late Holocene monsoon climate as evidenced by proxy records from a lacustrine sediment sequence in western Guangdong, South China
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Late Holocene monsoon climate as evidenced by proxy records from a lacustrine sediment sequence in western Guangdong, South China

机译：粤西地区湖相沉积序列的代用记录证明了晚全新世季风气候

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摘要

The study of a 300-cm-thick exposed lacustrine sediment section in the Hedong village in Zhaoqing area which is located in sub-tropical west Guangdong Province in South China, demonstrates that the lacustrine sedimentary sequence possibly contains evidence for exploring variation of Asian monsoon climate. Multi-proxy records, including the humification intensity, total organic carbon, and grain size fractions, reveal a general trend towards dry and cold conditions in the late Holocene that this is because of a decrease in solar insolation on an orbital scale. Three intensified Asian summer monsoon (ASM) intervals (～3300-3000 cal yr BP, ～2600-1600 cal yr BP, and ～900-600 cal yr BP), and three weakened ASM intervals (～4000-3300 cal yr BP, ～3000-2600 cal yr BP, and ～1600-900 cal yr BP) are identified. Our humification record (HD_(cal)) shows a good correlation on multi-centennial scale with the tree ring Δ~(14)C record, a proxy of solar activity. A spectral analysis of HD_(cal) reveals four significant cycles, i.e., ～1250 yr, 300 yr, 110 yr, and 70 yr, and most of these cycles are related to the solar activity. Our findings indicate that solar output and oceanic-atmospheric circulation probably have influenced the late Holocene climate variability in the study region.
机译：对华南亚热带西部肇庆地区河东村一个300厘米厚的裸露湖泊沉积物剖面的研究表明，湖相沉积序列可能包含探索亚洲季风气候变化的证据。 。多代理记录，包括腐殖化强度，总有机碳和粒度分数，揭示了全新世晚期朝着干燥和寒冷条件发展的总体趋势，这是由于太阳日射量在轨道尺度上的减少。三个强化的亚洲夏季风（ASM）间隔（〜3300-3000 cal BP，〜2600-1600 cal BP和〜900-600 cal BP），三个减弱的ASM间隔（〜4000-3300 cal BP，确定了〜3000-2600 cal yr BP和〜1600-900 cal yr BP）。我们的谦卑记录（HD_（cal））在多世纪尺度上与太阳活动的代表树环Δ〜（14）C记录显示出良好的相关性。 HD_（cal）的光谱分析揭示了四个重要的周期，即〜1250年，300年，110年和70年，这些周期中的大多数与太阳活动有关。我们的发现表明，太阳输出和海洋大气环流可能已经影响了该研究区晚全新世的气候变异性。

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  • 来源
    《Journal of Asian earth sciences》 |2014年第5期|56-62|共7页
  • 作者

    Zhong Wei; Cao jiayuan; Xue Jibin; Ouyang Jun; Tang Xiaohong; Yin Huanling; Liao Congyun; Long Kun;

  • 作者单位

    School of Geography Science, South China Normal University, Guangzhou 510631, China;

    School of Geography Science, South China Normal University, Guangzhou 510631, China;

    School of Geography Science, South China Normal University, Guangzhou 510631, China;

    School of Geography Science, South China Normal University, Guangzhou 510631, China;

    School of Geography Science, South China Normal University, Guangzhou 510631, China;

    School of Geography Science, South China Normal University, Guangzhou 510631, China;

    School of Geography Science, South China Normal University, Guangzhou 510631, China;

    School of Geography Science, South China Normal University, Guangzhou 510631, China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Late Holocene; Asian monsoon; Climatic forcing mechanisms; South China;

    机译：全新世晚期亚洲季风气候强迫机制;华南;

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