High resolution stalagmite δ18O records over the past 1000 years from Dongge Cave in Guizhou

Yaoqi He, Yongjin Wang, Xinggong Kong, Hai Cheng

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22 Scopus citations

Abstract

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 established 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 the δ18O 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, suggesting 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.

Original languageEnglish (US)
Pages (from-to)1003-1008
Number of pages6
JournalChinese Science Bulletin
Volume50
Issue number10
DOIs
StatePublished - 2005

Bibliographical note

Funding Information:
Acknowledgements This work was supported by the National Outstanding Youth Foundation of China (Grant No. 40225007) and the 973 Project (Grant No. 2004CB20204).

Keywords

  • Cave stalagmite
  • Guizhou
  • Oxygen isotope
  • Solar activity
  • Southwest monsoon

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