Climate change said threat to U.S. forests

United Press International: Forests in the U.S. Southwest could be crippled by climate change as rising drought brings stress and tree mortality, researchers say. Scientists from Los Alamos National Laboratory, the U.S. Geological Survey and the University of Arizona combined tree-ring growth records with historical information, climate records, and computer-model projections of future climate trends to forecast the future health of the region's forests. Southwestern forests grow best when winters with high precipitation...

URL: http://www.upi.com/Science_News/2012/10/01/Climate-change-said-threat-to-US-forests/UPI-14711349109626/