Fig. 3: Comparison between Greenland ice-core and speleothem records from ISM and EASM domains during Marine Isotope Stage 3.
From: Interstadial diversity of East Asian summer monsoon linked to changes of the Northern Westerlies
a, b Greenland NGRIP4,5 and GISP2100,101 ice-core δ18O records, respectively, plotted on the 1.0063 × GICC05 chronology102 (Supplementary Note 1.4). c Southeast China speleothem δ18O records from Shennong cave (this study) and Xianyun cave52,103,104,105,106, respectively. Note that the XY-35 time series (purple) from Xianyun cave has been shifted by + 0.3‰ in order to be in agreement with the other records from this cave. d ISM domain Bittoo cave speleothem δ18O record [navy, ref. 68; Red, this study, plotted on a depth scale as in Fig. 2e]. Error bars in (c) and (d) indicate the typical age model uncertainties (2σ) of the Xianyun and Bittoo records, respectively. The vertical bars indicate short DO (DO-15.1), intermediate-length DO (lasting a few hundred years) and super-long DO (duration more than 1500 years), respectively (see main text). Note that we adopted the labeling convention DO-X for interstadials identified in both speleothem and ice-core records, where X corresponds to the numbering of Greenland Interstadials (GI) as outlined by Rasmussen et al.5. The red dashed boxes show the “overshoot” phases of the super-long interstadials. HS Heinrich Stadial; ISM Indian summer monsoon; EASM East Asian summer monsoon. DO Dansgaard-Oeschger.
