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File:Climate model NA annual precipitation 2002.jpg

Results of a coupled ocean-atmosphere global Climate Model Intercomparison Project (CMIP) being conducted by the Lawrence Livermore National Laboratory. This comparison relates to the spatial distribution of annual precipitation across North America. All models are compared to the "Xie/Arkin" observational data set. The difference between two differing observation-based data sets reflect observational uncertainties, so we would not expect any model to skillfully exceed these differences. All models are evaluated on the basis of pattern correlations with the observations and the relative differences of annual precipitation integrated across all model grid points in North America. The Hadley Center climate model used in the National Assessment is shown with an "*" and the Canadian Climate Centre is shown with a "#" symbol.



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