Fig. 2From: Changes in surface water masses in the northern East China Sea since the Last Glacial Maximum based on diatom assemblagesThe age-depth plot of Core KY07-04 PC01. Open circles denote radiocarbon dates (calibrated to calendar age) of planktic foraminifera with error bars (± 1σ). Orange vertical line indicates K-Ah tephra stratum. The K-Ah tephra datum (7252 ± 56 yr ago) is from Lake Suigetsu varve sediment (McLean et al. 2018)Back to article page