WASHINGTON - Most of the increase in ocean temperature that feeds more intense hurricanes is a result of human-induced global warming, according to a study published Monday that used 22 computer models to play out dozens of scenarios.

Tom Wigley, a co-author and a climate scientist at the National Center for Atmospheric Research in Boulder, Colo., said the study “closes the loop” between climate change and powerful storms like Hurricane Katrina. The study follows research papers over the past year or so that have shown an increase in the power of hurricanes, but also skepticism from some experts who question the reliability of computer models.

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