Fig. 1

a Linear trends of precipitation minus PET in FMA (unit: mm day−1 decade−1). Significant values exceeding the 0.1 and 0.05 significance levels are marked by gray and black dots, respectively; b the annual cycle of monthly anomalies (left vertical axis; red bars; unit: mm day−1) and linear trends (right vertical axis; blue bars; unit: mm day−1 decade−1) of precipitation minus PET averaged over SE China. The significant values of trends exceeding the 0.05 significance level are indicated by hatched lines. The positions of stations in SE China are represented by green asterisks