Correlation of climatic events between East Asia and Norwegian Sea during last deglaciation |
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| Authors: | Weijian Zhou Zhisheng An S C Porter D Donahue A J T Jull |
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| Institution: | (1) State Key Laboratory of Loess and Quaternary Geology, Chinese Academy of Sciences, 710054 Xi’an, China;(2) Department of Geology, Northwest University, 710069 Xi’an, China;(3) Quaternary Research Center, University of Washington, 98195 Seattle, USA;(4) NSF-AMS-Facility, University of Arizona, 85721 Tueson, USA |
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| Abstract: | Using a high resolution14C chronology, β13C values and organic carbon content, from loess/paleosol and peat profiles in China, we can demonstrate century scale warm-cold
East Asian monsoon paleoclimatic fluctuation events and significant precipitation variability within the last deglaciation.
The major climatic events recognized are the Bolling (1 300-12 500 a B.P.), Older Dryas (12 500-11 750 a B. P.), Allerod (11
750-11 200 aB.P.) and Younger Dryas (11 200-10 000 aB.P.). The stratigraphic structure of the last deglaciation sediments
is characterized by frequent changes in sedimentation phases reflecting climatic instability. These high frequency, rapid
climatic events can correlate with fluctuations recorded by sea surface temperatures in the Norwegian Sea. This indicates
a pale-oclimate teleconnection between polar, high latitude areas and East Asian monsoon areas through westerlies and the
related atmospheric pressure system.
Project supported by the National Natural Science Foundation of China, the Foundation of Chinese Academy of Sciences and the
National Science Foundation of U.S.A. |
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| Keywords: | last deglaciation East Asian monsoon paleoclimatic fluctuation loess-paleosol |
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