100 k.y. pacing of the East Asian summer monsoon over the past five glacial cycles inferred from land snails

Abstract The effects of orbital forcing on the East Asian summer monsoon (EASM) after mid-Pleistocene transition are controversial. Chinese cave δ18O records only show low-latitude ∼20 k.y. cycles, while pedogenic proxy from loess dominated by highlatitude 100 cycles. This discrepancy may result multicomponent origin proxies, particularly for signals in deposits, where primary climatic modified smoothing, leaching, and changes sedimentation rate, latter also being forced We present an EASM record spanning past 470 central Loess Plateau based δ13C values land snail shells (δ13Cshell), which eliminates influence above processes exclusively local precipitation. δ13Cshell is cycle, with more depleted during interglacials compared to glacials. At end marine isotope stage (MIS) 11, δ13Cshell-based precipitation remained at interglacial level following MIS 11 super-interglacial climate Northern Hemisphere, although a glacial period had commenced global basis. Overall, our highly coupled high-northern-latitude ice-volume variations, possibly supporting high-latitude EASM.