Mean Annual Precipitation under the A1B Emissions Scenario (Western North America, 23 AOGCM Ensemble)

This set of 4 rasters shows mean annual precipitation (mm) for Western North America under the A1B Emissions Scenario from the Intergovernmental Panel on Climate Change (IPCC). One layer shows the historic period (1961 to 1990), and there are three layers of future climate projections representing the 2020s, the 2050s, and the 2080s. These future layers are ensemble averages across all 23 CMIP3 AOGCMs (Coupled Model Intercomparison Project 3 Atmosphere-Ocean General Circulation Models). All layers have a resolution of 1 km, and are designed to capture climate gradients, temperature inversions, and rain shadows in the mountainous landscape of western North America.

These data, originally published here, were converted to ArcGIS grids by the NPLCC (North Pacific Landscape Conservation Cooperative) for publication as map services on ScienceBase.

For further information and citation refer to:

Hamann, A. and Wang, T., Spittlehouse, D.L., and Murdock, T.Q. 2013. A comprehensive, high-resolution database of historical and projected climate surfaces for western North America. Bulletin of the American Meteorological Society 94: 1307–1309.