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首页> 外文期刊>Quaternary Research: An Interdisciplinary Journal >East Asian winter monsoon evolution since the late Pliocene based on a pollen record from Lake Xingkai, northeast Asia
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East Asian winter monsoon evolution since the late Pliocene based on a pollen record from Lake Xingkai, northeast Asia

机译：东亚冬季季风演变以来，基于邢凯湖，东北亚湖的花粉纪录

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摘要

A 328.58 m drill core (XK12) was recovered from lacustrinealluvial sediments in the Xingkai Basin, northeast China, with the aim of obtaining a high-resolution pollen record of East Asian winter monsoon (EAWM) evolution since 3.6 Ma. An index based on the pollen record of thermophilous trees and terrestrial herbs is used as an indicator of winter temperature conditions controlled by the EAWM, at the glacialinterglacial scale. Primary age control was established based on lithostratigraphy and magnetostratigraphy, and then the pollen index was correlated to the LR04 global benthic δ18O record and finally tuned to Earth orbital obliquity to produce a high-resolution astronomical time scale. The pollen record indicates that the EAWM underwent two stepwise enhancements at 2.8 and 1.6 Ma. These events are consistent with paleoclimatic records of mean quartz grain size from the Chinese Loess Plateau, and they are also in accord with the initiation and intensification of Northern Hemisphere glaciation. Our findings suggest that the variability of the EAWM since 3.6 Ma was primarily controlled by changes in global ice volume and climatic cooling.
机译：328.58米钻核（XK12）从东北兴凯盆地的Lapustlinuvial沉积物中恢复，目的是自3.6 mA以来获得东亚冬季季风（EAWM）演变的高分辨率花粉记录。基于嗜热树木和陆地草药花粉记录的指数用作玻璃闭合尺度由EAWM控制的冬季温度条件的指标。基于Lithostrataphy和磁性对象建立了主要年龄控制，然后花粉指数与LR04全球底栖δ18O记录相关，最终调整到地球轨道倾斜以产生高分辨率的天文时间尺度。花粉记录表明，EAWM在2.8和1.6 mA下进行了两种逐步增强。这些事件与中国黄土高原的平均石英晶粒大小的古跨越记录一致，它们也符合北半球冰川的启动和强化。我们的研究结果表明，自3.6 mA以来，EAWM的可变性主要受全球冰量量和气候冷却的变化控制。

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  • 作者

    Shouzhen Xin; Ji Shen; Wenfang Zhang; Weiwei Sun; Xiayun Xiao;

  • 作者单位

    State Key Laboratory of Lake Science and Environment Nanjing Institute of Geography and Limnology Chinese Academy of Sciences Nanjing 210008 China;

    State Key Laboratory of Lake Science and Environment Nanjing Institute of Geography and Limnology Chinese Academy of Sciences Nanjing 210008 China;

    State Key Laboratory of Lake Science and Environment Nanjing Institute of Geography and Limnology Chinese Academy of Sciences Nanjing 210008 China;

    State Key Laboratory of Lake Science and Environment Nanjing Institute of Geography and Limnology Chinese Academy of Sciences Nanjing 210008 China;

    State Key Laboratory of Lake Science and Environment Nanjing Institute of Geography and Limnology Chinese Academy of Sciences Nanjing 210008 China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 第四纪（系）;
  • 关键词

    East Asian winter monsoon; Lake Xingkai; Pollen record; Pliocene; Pleistocene; Astronomical time scale;

    机译：东亚冬季季风;邢凯湖;花粉记录;全烯;全文;天文时间尺度;

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