Dueling Models: Future U.S. Climate Uncertain

GREENHOUSE WARMINGA U.S. national assessment, drawing on the best available climate model predictions, has concluded that the United States will indeed warm, affecting everything from the western snowpacks that supply California with water to New England's fall foliage. But on a more detailed level, the assessment often draws a blank. As much as policy-makers would like to know exactly what's in store for Americans, the rudimentary state of regional climate science will not soon allow it, and the results of this 3-year effort brought the point home.