1. ISI-MIP agriculture simulations

2. 7 Global Gridded Crop Models: EPIC, GEPIC, IMAGE, LPJ-GUESS, LPJmL, pDSSAT, PEGASUS 4 first priority crops: wheat, maize, rice, soy (LPJmL and EPIC also provide simulations for additional crops)

3. Minimal scenario set-up

4. Ouput variables VariableVariable nameresolutionunitcomment Crop yieldsYield_ annual (0.5°x0.5°) dry matter t/ha/yr (t ha‐1 yr‐1) Crop‐specific Irrigation water demand (potential irrigation water Withdrawal) PIrrWW_ annual (0.5°x0.5°) kg/m2/s (kg m‐2 s‐1) Irrigation water needed for an optimal irrigation (in addition to rainfall), assuming unlimited water supply, the irrigation water amount should be averaged over the whole year Additional variables: actual evapotranspiration, fertilizer application rates, growing season dates

5. Management settings Modellers were asked to provide simulations based on their „default present day“ setting which may be very different. modelFertilizer useAdaptation starting conditions (representation of present day yields or potential yields?) EPIC Environmental Policy Integrated Climate flexible N application rates (N-stress free days in 90% of crop growing period to an upper application limit of 200 kg ha-1) Constant P application rates. annual adjustment of planting dates; total heat units to reach maturity remain constant no adjustment of cultivars present day potential yields LPJmLSoil nutrient limiting factors are not accounted for Fixed sowing dates, total heat units to reach maturity remain constant present day yields (10)

6. Results