About this map

While temperatures are projected to increase, precipitation is expected to decrease. Southern California is projected to be even drier in by 2050 (according to the NSF-DOE-NCAR model displayed here). 

We’re still not entirely sure how precipitation will change in the future; different models produce slightly different scenarios. It is important to incorporate this uncertainty into analyses of species richness and predictions of species distributions.

Data source: Current precipitation data from Robert J. Hijmans, Susan Cameron, and Juan Parra, WorldClim-Global Climate Data, University of Berkeley, USA, retrieved from NSF-DOE-NCAR layer from Community Earth System Model ver. 1.0 (CESM1-CAM5-1-FV2).