Asian monsoon intensity coupled to Antarctic climate during Dansgaard–Oeschger 8 and Heinrich 4 glacial intervals

Yi Jia Liang, Shi Tao Chen, Yong Jin Wang, Kan Zhao, Shao Hua Yang, Zhen Jun Wang, Yu Zheng Huang, Hai Cheng, R. Lawrence Edwards

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1 Scopus citations

Abstract

The transition from glacial to interglacial periods has been hypothesized to be linked to millennial-scale changes in oceanic/atmospheric circulation, but the relationships between these phenomena remain poorly constrained. Here we present a speleothem oxygen isotope record from Yongxing Cave, China, spanning 40.9 to 33.1 ka and compare this to existing Antarctic proxy records. We find that decadal-to-centennial rapid shifts in the Asian summer monsoon, Antarctic temperature, atmospheric methane and carbon dioxide are all coupled together during Dansgaard–Oeschger cycles, which may suggest an important role of the Intertropical Convergence Zone and Southern Ocean in driving the global greenhouse gas changes. Analogous to millennial-scale variations in trend, amplitude and internal sub-centennial-scale structures during Dansgaard–Oeschger 8 and Heinrich Stadial 4, the Younger Dryas and Heinrich Stadial 1 during the last ice termination provided critical positive feedbacks to changes in terrestrial vegetation and northern ice volume, and may have contributed to glacial to interglacial transition.

Original languageEnglish (US)
Article number298
JournalCommunications Earth and Environment
Volume3
Issue number1
DOIs
StatePublished - Dec 2022
Externally publishedYes

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© 2022, The Author(s).

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