Is the West’s Dry Spell Really a Megadrought?
http://www.climatecentral.org/news/is-the-wests-dry-spell-really-a-megadrought-16824
Is the Wests Dry Spell Really a Megadrought?
By Bobby Magill
Published: December 12th, 2013
SAN FRANCISCO The drought that has been afflicting most of the Western states for the past 13 years may be a megadrought, and the likelihood is high that this century could see a multi-decade dry spell like nothing else seen over the past 1,000 years, according to research presented at the American Geophysical Union Fall Meeting on Wednesday and Thursday.
Today, drought or abnormally dry conditions are affecting every state west of the Mississippi River and many on the East Coast, with much of the Southwest under long-term severe, extreme or exceptional drought conditions. While drought conditions nationwide are down this year, they remain entrenched in the West.
Since 2000, the West has seen landscape-level changes to its forests as giant wildfires have swept through the Rockies and the Sierra Nevada, bark beetles have altered the ecology of forests by killing countless trees and western cities have begun to come to terms with water shortages made worse by these changes as future snowpack and rainfall becomes less and less certain in a changing climate.
The current drought could be classified as a megadrought 13 years running, paleoclimatologist Edward Cook, director of the Tree Ring Laboratory at Columbia Universitys Lamont-Doherty Earth Observatory in Palisades, N.Y., said at an AGU presentation Wednesday night. Theres no indication itll be getting any better in the near term.