Indian summer monsoon variations during the Younger Dryas as revealed by a laminated stalagmite record from the Tibetan Plateau

Youwei Li, Carlos Pérez-Mejías, Jingyao Zhao, Hanying Li, Haiwei Zhang, Jiayu Lu, Jian Wang, Pengzhen Duan, Xiyu Dong, Haibo Wang, Youfeng Ning, Zhi Qian, R. Lawrence Edwards, Hai Cheng

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5 Scopus citations

Abstract

High-resolution and precisely dated hydroclimate records in the southeastern Tibetan Plateau (TP) remain sparse beyond the Holocene, which hampers our ability to understand the hydroclimate variability in this important Indian summer monsoon (ISM) fringe area and its global teleconnection. Here we present 3-y resolution δ18O and δ13C records from a laminated stalagmite (RG-3) from Rige Cave in the southeastern TP, spanning the Younger Dryas (YD). The records allow us to precisely characterize the timing, structure, and particularly centennial-scale events within the YD, and probe the control factors of precipitation δ18O (δ18Op) in the ISM fringe area. On centennial–millennial timescales, the Rige δ18O record shows coherent pattern with the East Asian summer monsoon (EASM) counterpart, combined with modeled δ18Op results and spatial analysis, suggesting that δ18Op in this part of the TP is largely controlled by the large-scale atmosphere circulation (or the ISM strength), and the altitude increase in the TP may not potentially result in an opposite δ18Op pattern at least in the monsoonal TP regime. We also found significant δ13C-δ18O covariation on the centennial timescale, suggesting a coincided ISM rainfall and biomass change during the YD. In the Rige records, one weak centennial-scale ISM event (namely the intra-Allerød cold period, IACP) and three strong centennial-scale ISM events within the YD (namely A1′-A2′-A3′) were prominent and occurred between ∼12,470 and 12,310 ± 14, ∼12,210–12,090 ± 12 and ∼12,010–11,920 ± 12 y BP (before present, where present = 1950 CE), respectively. Spectral analyses of Rige records also revealed a significant ∼200-y periodicity, which is nearly in-phase with observed centennial-scale variations of the North Atlantic temperature and mid-latitude westerly-jet during that time. These observations support the hypothesis that the solar de Vries cycle (207-y) triggered the centennial-scale climate variations in high northern latitude, leading to the ISM variations via fast atmospheric processes.

Original languageEnglish (US)
Article number107375
JournalQuaternary Science Reviews
Volume278
DOIs
StatePublished - Feb 15 2022

Bibliographical note

Funding Information:
We thank Florian Adolphi of Alfred Wegener Institute for Polar and Marine Research for his constructive comments. This work was supported by National Nature Science Foundation of China (NSFC) grants ( 41888101 , 41731174 and 42150710534 ) to HC; Guizhou Provincial Science and Technology Projects (No. [2020]1Y162 ) to YL; NSFC grant ( 42050410317 ) and Postdoctoral Science Foundation of China ( 2020M683452 ) to CP; NSFC grant ( 42002199 ) to JZ; NSFC grant ( 41972186 ) to HZ.

Funding Information:
We thank Florian Adolphi of Alfred Wegener Institute for Polar and Marine Research for his constructive comments. This work was supported by National Nature Science Foundation of China (NSFC) grants (41888101, 41731174 and 42150710534) to HC; Guizhou Provincial Science and Technology Projects (No. [2020]1Y162) to YL; NSFC grant (42050410317) and Postdoctoral Science Foundation of China (2020M683452) to CP; NSFC grant (42002199) to JZ; NSFC grant (41972186) to HZ.

Publisher Copyright:
© 2022 Elsevier Ltd

Keywords

  • Centennial-scale event
  • Precipitation δO
  • Speleothem
  • Tibet plateau
  • Younger dryas

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