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East Asian summer monsoon climates and cave hydrological cycles over Dansgaard-Oeschger events 14 to 11 revealed by a new stalagmite record from Hulu Cave

Published online by Cambridge University Press:  05 August 2019

Yijia Liang Open the ORCID record for Yijia Liang [Opens in a new window] ,
Yongjin Wang ,
Quan Wang ,
Jiangying Wu ,
Qingfeng Shao ,
Zhenqiu Zhang ,
Shaohua Yang ,
Xinggong Kong  and
R. Lawrence Edwards
Yijia Liang
Affiliation:
School of Geography, Nanjing Normal University, Nanjing 210023, China Key Laboratory of Virtual Geographic Environment, Nanjing Normal University, Ministry of Education, Nanjing 210023, China
Yongjin Wang*
Affiliation:
School of Geography, Nanjing Normal University, Nanjing 210023, China Key Laboratory of Virtual Geographic Environment, Nanjing Normal University, Ministry of Education, Nanjing 210023, China
Quan Wang
Affiliation:
School of Geography, Nanjing Normal University, Nanjing 210023, China Key Laboratory of Virtual Geographic Environment, Nanjing Normal University, Ministry of Education, Nanjing 210023, China School of Geography and Tourism, Chongqing Normal University, Chongqing 401331, China
Jiangying Wu
Affiliation:
School of Geography, Nanjing Normal University, Nanjing 210023, China Key Laboratory of Virtual Geographic Environment, Nanjing Normal University, Ministry of Education, Nanjing 210023, China
Qingfeng Shao
Affiliation:
School of Geography, Nanjing Normal University, Nanjing 210023, China Key Laboratory of Virtual Geographic Environment, Nanjing Normal University, Ministry of Education, Nanjing 210023, China
Zhenqiu Zhang
Affiliation:
School of Geography, Nanjing Normal University, Nanjing 210023, China Key Laboratory of Virtual Geographic Environment, Nanjing Normal University, Ministry of Education, Nanjing 210023, China School of Life Sciences, Nanjing Normal University, Nanjing 210023, China
Shaohua Yang
Affiliation:
School of Geography, Nanjing Normal University, Nanjing 210023, China Key Laboratory of Virtual Geographic Environment, Nanjing Normal University, Ministry of Education, Nanjing 210023, China
Xinggong Kong
Affiliation:
School of Geography, Nanjing Normal University, Nanjing 210023, China Key Laboratory of Virtual Geographic Environment, Nanjing Normal University, Ministry of Education, Nanjing 210023, China
R. Lawrence Edwards
Affiliation:
School of Geography, Nanjing Normal University, Nanjing 210023, China Department of Earth Sciences, University of Minnesota, Minnesota 55455, USA
*
*Corresponding author. e-mail address: [email protected] (Y. Wang).
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Abstract

A 230Th/U-dated stalagmite from Hulu Cave was analyzed for δ18O, δ13C, and trace elements. A ~10-yr-resolution δ18O record, spanning 51.7–42.6 ka, revealed Dansgaard-Oeschger (DO) events 14 to 11. A similar rapid transition and synchronous timing of the onset of DO 12 is evident between the Greenland and Hulu Cave records, which suggests a common forcing mechanism of DO cycles in the North Atlantic and monsoonal region of Asia. Centennial-scale monsoonal oscillations in the cave δ18O record are indicative of hydroclimatic instability during interstadials. After removing the signals of remote moisture sources, the proportion of moisture from nearby sources is found to be higher during stadials than during interstadials. To explain this, we propose that the movement of the westerly jet is an important control on the balance of nearby and distant moisture sources in East Asia. In addition, the records of δ13C and trace element ratios, which are proxies of local environmental changes, resemble the δ18O record on the scale of DO cycles, as well as on even shorter timescales. This suggests that hydrological processes and biological activity at the cave site respond sensitively to the monsoonal changes.

Keywords

Hulu CaveStalagmiteEast Asian summer monsoonDansgaard-Oeschger eventsCave hydrological cycles
Type
Research Article
Information
Quaternary Research , Volume 92 , Issue 3 , November 2019 , pp. 725 - 737
Copyright
Copyright © University of Washington. Published by Cambridge University Press, 2019 

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References

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