Journal Article Research Support, Non-U.S. Gov't climate change impact food security 1.5°C warming 142M471B3J Carbon Dioxide Grain Proteins N762921K75 Nitrogen Research Support, U.S. Gov't, Non-P.H.S. 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 wheat wheat (Triticum aestivum L.) wheat production