High-resolution reconstruction of variation in aeolian dust (Kosa) deposition at ODP site 797, the Japan Sea, during the last 200 ka
High-resolution reconstruction of variation in aeolian dust (Kosa) deposition at ODP site 797, the Japan Sea, during the last 200 ka
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DOI：
10.1016/s0921-8181(02)00135-2
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发表时间：
2003
期刊：
影响因子：
--
通讯作者：
T. Irino;R. Tada
中科院分区：
文献类型：
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作者：
T. Irino;R. Tada
为了重建东亚季风过去的变化，并建立陆地和海洋气候记录之间的直接联系，我们评估了风成尘（Kosa或黄沙）通量的时间变化，在日本海晚第四纪半远洋沉积物在海上。Irino和Tada确定的四个碎屑子组分的贡献[Geochem. J. 34（1）（2000）59]由于Kosa源自“典型”黄土，因此Kosa源自“风化”黄土以及细粒和粗粒弧源碎屑，在过去200 ka中，Kosa在千年尺度以及冰川-间冰期尺度上都有所不同。“典型”黄土中Kosa的千年尺度变化表明，近200 ka来中东亚地区夏季风降水的高频变化控制了沙尘有效性的变化，而“风化”黄土中Kosa的变化表明，沙尘输送路径的变化可能受到冬季风变化的影响。
In order to reconstruct past variations in the east Asian monsoon and to establish a direct link between terrestrial and marine climatic records, we evaluated the temporal variation in aeolian dust (Kosa or yellow sand) flux to the Japan Sea using the late Quaternary hemipelagic sediments in the sea. Contributions of four detrital subcomponents, identified by Irino and Tada [Geochem. J. 34(1) (2000) 59] as Kosa derived from “typical” loess, Kosa from “weathered” loess and fine and coarse arc-derived detritus, have varied in millennial scale, as well as in glacial–interglacial scale, during the last 200 ka. Millennial scale variability of Kosa from “typical” loess suggests the change in dust availability controlled by high-frequency variation in summer monsoon precipitation in the central to east Asia during the last 200 ka, whereas variation in Kosa from “weathered” loess suggests the change in transport pathway of dust which was probably affected by the winter monsoon variation.