Journal Article N762921K75 Nitrogen Research Support, Non-U.S. Gov't climate change impact food security 059QF0KO0R 1.5°C warming 142M471B3J Carbon Dioxide Grain Proteins Letter Research Support, U.S. Gov't, Non-P.H.S. Soil Water climate change climate change adaptation crop models ecophysiological model ensemble mean ensemble median ensemble modeling extreme low yields grain protein model ensemble model intercomparison multimodel ensemble prediction process-based model uncertainty