A 3000-yr annually laminated stalagmite record of the Last Glacial Maximum from Hulu Cave, China

Fucai Duan, Jiangying Wu, Yongjin Wang, R. Lawrence Edwards, Hai Cheng, Xinggong Kong, Weihong Zhang

Research output: Contribution to journalArticlepeer-review

15 Scopus citations

Abstract

A high-resolution, annual layer-counted and 230Th-dated multi-proxy record is constructed from a stalagmite in Hulu Cave, China. These proxies, including δ18O, annual layer thickness (ALT), gray level (GL) and Sr/Ca, cover a time span of ~3000yr from 21 to 24ka. The physical proxies (ALT and GL) and the geochemical index (Sr/Ca), all primarily reflecting karst hydrological processes, vary in concert and their coherence is supported by wavelet analyses. Variations in the δ18O data agree with fluctuations in the ALT and Sr/Ca records on multi-decadal to centennial scales, suggesting that the Hulu δ18O signal is strongly associated with varying local rainfall amounts on short timescales. A monsoon failure event at ~22.2ka correlates with a decrease in tropical rainfall, a reduction in global CH4 and an ice-rafted event in the North Atlantic. This correlation highlights roles of the Asian monsoon and tropical hydrological cycle in modulating global CH4, because the high-latitude emission was inhibited during the Last Glacial Maximum (LGM). Spectral analysis of the δ18O record displays peaks at periodicities of 139, 59, 53, 43, 30, 23 and 19-15yr. The absence of typical centennial solar cycles may be related to muted changes in ocean circulation during the LGM.

Original languageEnglish (US)
Pages (from-to)360-369
Number of pages10
JournalQuaternary Research (United States)
Volume83
Issue number2
DOIs
StatePublished - Mar 1 2015

Keywords

  • East Asian summer monsoon
  • Hulu Cave
  • Last Glacial Maximum
  • Monsoon rainfall
  • Stalagmite

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