Ocean surface temperatures have been rising over time and several studies have linked this increase to more frequent hurricanes, but not in a way that completely eliminates natural processes as an alternative explanation. This study helps to remove some of the doubt about the link between surface temperatures and hurricane frequency:
Intense Storms Tied to Rising Ocean Temperature, by Valerie Bauerlein, WSJ: A new study published yesterday in the online edition of the journal Science says rising ocean temperatures around the globe are to blame for the surge of intense hurricanes that has slammed the U.S. and other countries in recent years -- a finding likely to further roil the debate over whether human activity is triggering more-devastating storms. The study ... concluded that the sharp increase in the number of very intense hurricanes can't be attributed to a normal weather cycle or other natural explanations. ...
Scientific American has more on the analysis.
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