By RANDOLPH E. SCHMID, AP Science Writer 57 minutes ago WASHINGTON - Most of the increase in ocean temperature that feeds more intense hurricanes is a result of human-induced global warming, says a study that one researcher says "closes the loop" between climate change and powerful storms like Katrina. ADVERTISEMENT A series of studies over the past year or so have shown an increase in the power of hurricanes in the Atlantic and Pacific oceans, a strengthening that storm experts say is tied to rising sea-surface temperatures. And most of that temperature increase can be blamed on global warming caused...