COLUMBUS, Ohio, Sept. 7 (TNSres) -- Ohio State University issued the following news: * * * Researchers examine trends from years 850-2100 in North America * * * Severe drought in the American Southwest and Mexico and more severe wet years in the Northeast are the modern norm in North America, according to new research - and the analysis suggests these seasonal patterns will be more extreme in the future. The middle of the United States, meanwhile, can expect bigger swings between wetter wet  more