Fig. 5. Comparison of the total annual global calories of maize, soybean, wheat, and rice for RCP 8.5 as projected by four sets of ensemble simulations. The first two sets assume no change in irrigated areas and consist of (i) 30 GCM × GGCM combinations with CO2 effects and (ii) 22 GCM × GGCM combinations without CO2 effects. The second two sets consist of (iii) 202 GCM × GHM × GGCM combinations with CO2 effects and a global net expansion in irrigated areas according to the IWD crop scenario, and (iv) 156 GCM× GHM × GGCM combinations without CO2 effects and a global net expansion in irrigated areas according to the IWDhydro scenario.
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