New York Times: A new study finds that the strongest of hurricanes and typhoons have become even stronger over the last two and a half decades, adding grist to the contentious debate over whether global warming has already made storms more destructive. “I think we do see a climate signal here,” said James B. Elsner, a professor of geography at Florida State University who is the lead author of the paper, being published in Thursday’s issue of the journal Nature. The study, which also found …