科学通报（英文版）021818

	科学通报（英文版） CHINESE SCIENCE BULLETIN 2002 Vol.47 No.18 P.1578-1584

Temperature variations in the past 6000 years inferred from δ18O of peat cellulose from Hongyuan, China

XU Hai（Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China;Graduate School of Chinese Academy of Sciences, Beijing 100039, China）　
HONG Yetang（Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China;）　
LIN Qinghua（Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China;）　
HONG Bing（Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China;）　
JIANG Hongbo（Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China;）　
ZHU Yongxuan（Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China;）　

Abstract：Trends of the temperature variations recorded in δ18O in Hongyuan peat cellulose are similar to those recorded in δ 18O of Jinchuan peat cellulose and inδ18O of Dunde ice core. Climate events have been identified to be globallyhomogeneous. Two notable climate transition periods have been detected in the past 6000 years, namely 4000 aBP with climate shifting from cold to warm and 1500aBP with climate shifting from warm to relatively cold. Power spectrum analysiswas performed to investigate the periodical signals in the δ18O time series. Typical periodicities of 1200-1087 a, 752 a, 444 a, 325 a, 213 a, 127-123 a, 88a, 79 a were discovered, indicating an integrated influence on Hongyuan climatefrom solar, monsoon and ocean activities. Solar forcing has been addressed to be the main driving forcing of Hongyuan climate.
Keywords：Hongyuan, oxygen isotopic composition, peat, temperature.

CLC Number：P5　Document ID：A

Author Resume：Correspondence should be addressed to Xu Hai (e-mail: xuhai@public.gz.cn)

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Manuscript Received：2002年5月15日

Published：2002年9月30日

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