Fig. 3

Comparison of the flood change ratio among two simulations. (a,b) Among two future scenarios characterized by the same warming level but under different RCP-SSP scenarios: (a) 2.0 °C warming between SSP1-RCP2.6 and SSP5-RCP8.5; (b) 2.0 °C warming between SSP2-RCP4.5 and SSP5-RCP8.5 (IPSL-CM6-LR). (c–f) Among two future scenarios at different warming levels: (c) 1.5 °C and 2.0 °C under SSP1-RCP2.6; (d) 1.5 °C and 2.0 °C under SSP2-RCP4.5; (e) 2.0 and 3.0 °C under SSP5-RCP8.5; (f) 3.0 and 4.0 °C under SSP5-RCP8.5. The dashed line is a 1:1 linear. “b” is the slope of the fitted line using principal component regression and the R value is the correlation of determination. The results of IPSL-CM6A-LR GCM are shown here, while same results for other GCMs are in supplement.