via NG again.
Global climate models have apparently failed in their predictions in at least one respect - as the Earth has warmed, precipitation has also increased in a similiar fashion. Satellite imagery available since 1987 has been recently analyzed showing this to be the case.
"The results fly in the face of many of the world's most sophisticated climate models, which predict that worldwide rainfall will increase at a much slower rate than temperatures.
The findings also cast doubt on the ability of climate models to accurately predict precipitation on regional scales."
Most climate models tend to predict that dry areas will get drier, and wet ones wetter with additional warming, but the evidence does not appear to be stacking up in this fashion, which is good news for regions such as the Americna Southwest.