Welcome to the Hothouse

By Keith Kloor | February 2, 2009 9:49 pm

Last Friday, Californians woke up to this cheery news on their climate front:

“State officials reported a Sierra Nevada snowpack smaller than normal on Thursday and said California may be at the beginning of its worst drought in modern history. Residents were immediately urged to conserve water.”

Okay, I realize this sounds bad enough, but I always have a problem when state water officials in the West compare their droughts to previous ones in “modern history,” which usually means the last hundred years or so. We really need to extend the timescale a bit–say by 1,000 years–if we want to grapple with drought as a cyclical weather phenomena.

Advances in tree ring science have revealed that numerous mega-droughts (lasting decades) hammered the West and Midwest 750 years ago.

Then factor in those pesky greenhouse gases, and the future of the American West looks like this, according to a 2007 Columbia University study published in the journal Science.

So yes, California, you may be entering what climate scientists are calling the era of “perpetual drought.

CATEGORIZED UNDER: California, drought

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Collide-a-Scape is an archived Discover blog. Keep up with Keith's current work at http://www.keithkloor.com/

About Keith Kloor

Keith Kloor is a NYC-based journalist, and an adjunct professor of journalism at New York University. His work has appeared in Slate, Science, Discover, and the Washington Post magazine, among other outlets.From 2000 to 2008, he was a senior editor at Audubon Magazine.In 2008-2009, he was a Fellow at the University of Colorado’s Center for Environmental Journalism, in Boulder, where he studied how a changing environment (including climate change) influenced prehistoric societies in the U.S. Southwest.He covers a wide range of topics, from conservation biology and biotechnology to urban planning and archaeology.


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