Journal Article climate change climate change impact food security 1.5°C warming 142M471B3J Carbon Dioxide Grain Proteins N762921K75 Nitrogen Research Support, Non-U.S. Gov't Research Support, U.S. Gov't, Non-P.H.S. climate change adaptation crop modeling crop models ensemble mean ensemble median extreme low yields grain protein model ensemble model improvement multimodel ensemble prediction solanum tuberosum uncertainty analysis wheat wheat production yield sensitivity