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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(xué)通報(bào)(英文版) SCI 英文刊名: CHINESE SCIENCE BULLETIN 年,卷(期): 2005 50(10) 分類號: P5 關(guān)鍵詞: cave stalagmite oxygen isotope southwest monsoon solar activity Guizhou【High resolution stalagmiteδ18O recor】相關(guān)文章:
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