Fig. 2

Age model of the study sites DWL3101, MD12-3429, ZHS-176 and MD12-3432. a Age models of sites DLW3101 and MD12-3429 based on the planktic δ¹⁸O data from Zhou et al. (2018) and Li et al. (2017); the age model of ZHS-176 is from Ge et al. 2010 and Zhang et al. 2013; and the age model of MD12-3432 is from Chen et al. (2017b) and Wang et al. (2018a); b Linear sedimentation rates (LSRs) of DLW3101, MD12-3429, ZHS-176 and MD12-3432. Gray bars highlight glacial periods with marine isotope stages (MIS) noted on the top