The «clear sky» upper limit for the CO2 induced increase in evaporation is below the measurement uncertainty bounds. (notrickszone.com)
The Fifth Assessment Report, issued by the United Nations Intergovernmental Panel on Climate Change (IPCC) in 2013, synthesized the available scientific studies and reported that increases in evaporation over arid lands are likely throughout the 21st century. (giss.nasa.gov)
In the Central Plains, drying would largely be caused by the same temperature - driven increase in evaporation. (giss.nasa.gov)