Journal Article Research Support, Non-U.S. Gov't climate change impact food security wheat 1.5°C warming 142M471B3J Carbon Dioxide Grain Proteins Multi-model ensemble N762921K75 Nitrogen Research Support, U.S. Gov't, Non-P.H.S. climate change climate change adaptation crop models ensemble mean ensemble median extreme low yields grain protein model ensemble multimodel ensemble prediction sowing date sowing density tiller mortality tillering wheat production yield potential