In a new investigation of model projections of greenhouse gas warming impact on the Mediterranean, Zappa et al (2015 Environ. Res. Lett. 10 104012) find that the decline in basin-wide precipitation scales linearly with the strength of the 850 hPa zonal wind over North Africa. This result supports previous findings that climate change will affect the Mediterranean primarily through changing the regional atmospheric circulation. The results of this study may guide improvements of climate models to better simulate the impact of greenhouse gas warming in this critical world region.