Table 2. Change in average climate variables between 1980-1999 and 2080-2099 from GCM and RCM output.
Region | Model | Mean temperature of the coldest month, °C | Mean temperature of the warmest month, °C | Annual precipitation, mm | April–August precipitation, mm |
---|---|---|---|---|---|
California | GCM | 2.53 | 2.52 | –12.49 | –5.27 |
RCM | 2.45 | 2.82 | –5.18 | –19.87 | |
Northwest California | GCM | 2.16 | 2.16 | –30.69 | –11.81 |
RCM | 2.27 | 2.98 | 31.11 | –16.03 | |
Cascade Ranges | GCM | 2.51 | 2.49 | –6.95 | –2.03 |
RCM | 2.60 | 3.33 | 39.15 | –20.45 | |
Modoc Plateau | GCM | 2.54 | 2.52 | –3.65 | –0.44 |
RCM | 2.64 | 3.65 | 39.81 | 4.26 | |
Sierra Nevada | GCM | 2.57 | 2.55 | –2.12 | –0.65 |
RCM | 2.66 | 2.90 | –17.20 | –46.43 | |
Great Central Valley | GCM | 2.45 | 2.43 | –6.28 | –2.36 |
RCM | 2.37 | 2.41 | –3.63 | –24.56 | |
East of Sierra Nevada | GCM | 2.71 | 2.71 | –0.85 | –0.58 |
RCM | 2.86 | 3.53 | –18.16 | –25.39 | |
Central west California | GCM | 2.25 | 2.23 | –18.08 | –7.44 |
RCM | 2.21 | 2.15 | –20.35 | –18.78 | |
Mojave Desert | GCM | 2.83 | 2.84 | –14.07 | –6.81 |
RCM | 2.68 | 3.07 | –13.77 | –10.82 | |
Southwest California | GCM | 2.58 | 2.58 | –15.26 | –7.41 |
RCM | 2.28 | 2.41 | –31.38 | –16.12 | |
Sonoran Desert | GCM | 2.80 | 2.79 | –14.37 | –7.31 |
RCM | 2.04 | 2.53 | –38.06 | –5.79 | |
Blue oak | GCM | 2.38 | 2.37 | –12.65 | –4.94 |
RCM | 2.37 | 2.56 | 2.71 | –24.45 | |
Valley oak | GCM | 2.32 | 2.34 | –13.27 | –5.26 |
RCM | 2.32 | 2.49 | 0.04 | –23.26 |
The first two rows reflect mean changes for all of California; subsequent rows reflect changes within the ecoregions identified in Fig. 1B. Blue oak and valley oak rows reflect changes within the modern potential habitat for those species, as determined by the discriminant model described in the text.