Ground Zero (IMAGE)

Columbia Climate School

Ground Zero

Caption

In a warming world, some regions are expected to get drier, while others will get wetter; a new study suggests this trend is already underway, and has been for more than 100 years. Here, a geologist traverses Petrified Forest National Park in southern Arizona, one of many regions expected to become more arid.

Credit

Kevin Krajick/Earth Institute, Columbia University

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