What's Next: Understanding how well climate models depict net precipitation gain was the first step. (pnnl.gov)
Wills et al. (2016) present an analysis of how circulation changes influence the global pattern of change in net precipitation (precipitation minus evaporation, P — E). (climate-dynamics.org)
Wills, R. C., and T. Schneider, 2015: Stationary eddies and the zonal asymmetry of net precipitation and ocean freshwater forcing. (climate-dynamics.org)