Observed decadal mean annual precipitation change

Developed for the 2014 NCA. New reports and images will be added as they become available.

Wed, 01/09/2013 - 00:09 -- mbp

General Information

Observed decadal mean annual precipitation change (deviations from the 1901-1960 average, %) for the contiguous United States (black line). Based on a new gridded version of COOP data from the National Climatic Data Center, the CDDv2 data set (R. Vose, personal communication, July 27, 2012). Gray lines indicate the 20th and 21st century simulations from 15 CMIP3 models, for the high (A2) emissions scenario. Observed precipitation variations are greater than the variations in the model simulations.
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Source Information

Image Source: 
Laura Stevens