Recent advances on reconstruction of climate and extreme events in China for the past 2000 years
Quansheng GE, Jingyun *ZHENG, Zhixin HAO, Yang LIU, Mingqi LI
Figure 2 Locations of 63 sites in the dataset of yearly drought/flood grade derived from Chinese historical documents starting from 137 BC (a) and percentage of available data for each drought/flood grade, excluding grade 3 (b)