Simulated difference in annual and seasonal mean temperature (F) for the Northwest region, for 2041-2070 with respect to the reference period of 1971-2000. These are multi-model means from 11 NARCCAP regional climate simulations for the high (A2) emissions scenario. Color with hatching (category 3) indicates that more than 50% of the models show a statistically significant change in temperature, and more than 67% agree on the sign of the change (see text). Note that the color scale is different from that of Fig. 9. Annual temperature changes for the NARCCAP simulations are similar to those for the CMIP3 global models (Fig. 9, middle left panel), but with greater warming in the southeastern portion of the region. Seasonal warming shows similar patterns in all seasons, with the greatest warming occurring in summer and winter.