High resolution stalagmiteδ18O records over the past 1000 years from Dongge Cave in Guizhou

Based on MC-ICP-MS U-series dating and stable O-isotope analysis results, a 4-5 years resolution monsoon record over the past 1000 years has been estab- lished for two stalagmites from Dongge Cave, Guizhou. The high resolution oxygen isotope record serves as a proxy for variations in rainfall of Asian southwest monsoon over the Yunnan-Guizhou Plateau. A close relation of theδ18O record with the Δ14C record from tree rings largely reflects impact of centennial-scale solar activity on the monsoon climate changes. The conspicuous decrease in the δ18O value at AD 1720 indicates an abrupt increase in monsoon rainfall, sug- gesting that an atmospheric-oceanic couple over the tropical Indian Ocean plays an important role in rapid increase of the Northern Hemisphere temperature over the last century.

作 者： HE Yaoqi Wang Yongjin Kong Xinggong CHENG Hai   作者單位： HE Yaoqi,Wang Yongjin,Kong Xinggong(College of Geography Science, Nanjing Normal University, Nanjing 210097, China)

CHENG Hai(Department of Geology and Geophysics, Minnesota University, Mineapolis MN 55455, USA) 

刊 名： 科學通報（英文版）  SCI 英文刊名： CHINESE SCIENCE BULLETIN  年，卷(期)： 2005 50(10)  分類號： P5  關鍵詞： cave stalagmite   oxygen isotope   southwest monsoon   solar activity   Guizhou  

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