Stalagmite-inferred centennial variability of the Asian summer monsoon in southwest China between 58 and 79 ka BP

Tao Tao Zhang, Ting Yong Li, Hai Cheng, R. Lawrence Edwards, Chuan Chou Shen, Christoph Spötl, Hong Chun Li, Li Yin Han, Jun Yun Li, Chun Xia Huang, Xin Zhao

Research output: Contribution to journalArticle

14 Scopus citations

Abstract

We use a new spliced stalagmite oxygen isotope record from Yangkou Cave and, Chongqing, southwest China, to reconstruct the centennial-millennial-scale changes in Asian Summer Monsoon (ASM) intensity between 58.0 and 79.3 thousand years before present (ka BP, before AD 1950). This multidecadally resolved record shows four strong ASM periods, corresponding to Greenland Interstadials (GIS) 17–20, and three weak ASM episodes, starting at 61.5 ± 0.2 ka BP and ending at 59.4 ± 0.2 ka BP that may correlate with Heinrich Event 6. The close agreement of climate events between China and Greenland supports the notion that the ASM is dominantly governed by high-latitude forcings in the Northern Hemisphere. The short-lived interstadial GIS 18, however, lasted for over 3 kyr in the records derived from ASM region, reflecting a gradual decline of ASM intensity, which coincides with a millennial-scale warming trend in Antarctica. This suggests an additional forcing of the ASM by the Southern Hemisphere, which also affected GIS 8–12, H4 and H5, as shown by previous speleothem studies from the ASM region.

Original languageEnglish (US)
Pages (from-to)1-12
Number of pages12
JournalQuaternary Science Reviews
Volume160
DOIs
StatePublished - Mar 15 2017

Keywords

  • Asian summer monsoon
  • Greenland interstadials
  • Heinrich event 6
  • Southern Hemisphere
  • Stalagmite δO

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