Coevolutions of terrestrial temperature and monsoonal precipitation amounts from the latest Pleistocene to the mid-Holocene in Japan: Carbonate clumped isotope record of a stalagmite

Quantitative paleotemperature reconstruction is a challenging and important issue in paleoenvironmental studies, for which carbonate clumped isotope (Δ47) thermometry promising approach. Here we analyzed Δ47 values from 66 layers of OT02 stalagmite Ohtaki Cave central Japan, covering two separate time intervals (2.6–8.8 34.8–63.5 ka) to reconstruct terrestrial temperature meteoric δ18O records. The average temperatures the Holocene interval latest Pleistonece were 16.3 °C ± 5.6 9.7 4.6 °C, respectively. also revealed that cold (5 °C–10 °C) correspond Heinrich stadials HSs4–6, warm (up 19.9 6.0 middle (approximately 6–5 accompanied by Hypsithermal climate optimum. We reconstructed past subtracting effect δ18O. Average was −8.2‰ 1.0‰ vs. VSMOW − 8.8‰ 0.8‰ Pleistocene interval. Over centennial timescales, more negative during colder periods, such as cooling event around 7 ka, less warmer warming. A dependency total 18O fractionation sea water precipitation likely reason correlation between Additionally, East Asian summer monsoon (EASM) brought larger rainfall whereas snow/rainfall winter (EAWM) periods. relative influences EASM EAWM changing timescale. had reflected changes δ18O, are both strongly related EAWM.