Abstract
Based on ice core records in the Tibetan Plateau and Greenland, the features and possible causes of climatic changes on orbital and sub-orbital time scale were discussed. Orbital time scale climatic change recorded in ice core from the Tibetan Plateau is typically ahead of that from polar regions, which indicates that climatic change in the Tibetan Plateau might be earlier than polar regions. The solar radiation change is a major factor that dominates the climatic change on orbital time scale. However, climatic events on sub-orbital time scale occurred later in the Tibetan Plateau than in the Arctic Region, indicating a different mechanism. For example, the Younger Dryas and Heinrich events took place earlier in Greenland ice core record than in Guliya ice core record. It is reasonable to propose the hypothesis that these climatic events were affected possibly by the Laurentide Ice Sheet. Therefore, ice sheet is critically important to climatic change on sub-orbital time scale in some ice ages.
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Yao, T., Xu, B. & Pu, J. Climatic changes on orbital and sub-orbital time scale recorded by the Guliya ice core in Tibetan Plateau. Sci. China Ser. D-Earth Sci. 44 (Suppl 1), 360–368 (2001). https://doi.org/10.1007/BF02912007
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DOI: https://doi.org/10.1007/BF02912007