Peter J Fawcett, Josef P Werne, R Scott Anderson, Jeffrey M Heikoop, Erik T Brown, Melissa A Berke, Susan J Smith, Fraser Goff, Linda Donohoo-Hurley, Luz M Cisneros-Dozal, Stefan Schouten, Jaap S Sinninghe Damsté, Yongsong Huang, Jaime Toney, Julianna Fessenden, Giday WoldeGabriel, Viorel Atudorei, John W Geissman, Craig D Allen
The potential for increased drought frequency and severity linked to anthropogenic climate change in the semi-arid regions of the southwestern United States (US) is a serious concern. Multi-year droughts during the instrumental period and decadal-length droughts of the past two millennia were shorter and climatically different from the future permanent, 'dust-bowl-like' megadrought conditions, lasting decades to a century, that are predicted as a consequence of warming. So far, it has been unclear whether or not such megadroughts occurred in the southwestern US, and, if so, with what regularity and intensity...
February 24, 2011: Nature