New research from North Carolina State University published in this month’s Proceedings of the National Academy of Sciences, suggests that the United States could experience stark crop yield declines under moderate climate change scenarios.
Agriculture and resource economist Michael Roberts and economist Dr. Wolfram Schenkler determined the impact of warming temperatures on corn, soybeans and cotton. They found that each had a critical temperature threshold above which crop yields started plummeting: 29°C for corn, 30°C for soybeans and 32°C for cotton.
Under slower global warming scenarios, Roberts and Schenkler project that yields for these crops could decline 30-46%. Under rapid global warming scenarios things got really bad, with yields dropping 63-82%.