Fig. 1: Historical increase in area equipped for irrigation and simulated irrigation water withdrawal.
From: Impacts of irrigation expansion on moist-heat stress based on IRRMIP results
a Global and regional time series of area equipped for irrigation (AEI) in 1901–2014. The area equipped for irrigation data is from the Land-Use Harmonization phase 2 (LUH2) project57, and the grid cells corresponding to IPCC reference regions are indicated in Fig. 2a. b Simulated mean global irrigation water withdrawal (IWW) with (blue: tranirr) by all six models and without (red: 1901irr) irrigation expansion by five models (except IPSL-CM6). The line indicates the median value of six (or five) models and the range indicates the maximum and minimum values. Note that IWW of CNRM-CM6-1 is applied as an external input, which is the irrigation fluxes from a global reconstructed hydrological dataset based on simulations34, and for the 1901irr experiment of IPSL-CM6, irrigation is switched off. c–h Global and regional IWW (tranirr) simulated by CESM2 (c), CESM2_gw (d), NorESM (e), E3SM (f), CNRM-CM6-1 (g), and IPSL-CM6 (h).
