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中国沙漠  2007 

Loess Record of Environment Changes in Upper Reaches of Weihe River since Last Interglacial
末次间冰期以来渭河上游气候演化的黄土记录研究

Keywords: Weihe River,Last Interglacial,loess,grain size,calcium carbonate,climate evolution
渭河
,末次间冰期,黄土,粒度,碳酸钙,气候演化

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Abstract:

Integrated analysis on the median grain size,CaCO3 content in the Fanjiatai loess section in upper reaches of Weihe River suggested that the climate in the Last Interglacial was characterized with warm and wet strongly influenced by summer monsoon,and that in the Last Glacial was cool and dry strongly influenced by winter monsoon.Because the summer monsoon was stronger and the deposition of dust were little during the early of the Last Interglacial(corresponding to the Stage 5e of the marine oxygen isotope records),the paleosol developed into the underlying layer;the lakes in the dust source had more water,and it induced that the grain size was little during the early of the stage MIS2 than the later;so it shows regional climatic character.

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