Worldwide, about 90 hurricanes occur yearly. A new study by Kerry Emanuel, a prominent MIT hurricane researcher, indicates that hurricanes are likely to become both stronger and more frequent, reports Andrew Freedman at Climate Central, especially in the western North Pacific, where the storms, known as tropical cyclones, can devastate the heavily populated Asian coastlines. The study showed the same for the North Atlantic, where about 12 percent of the world’s hurricanes originate each year. His study used the latest generation of global climate models to power a series of high-resolution, regional simulations of hurricanes worldwide, under the likely scenario of global emissions of greenhouse gases, such as carbon dioxide, rising rapidly without being significantly cut. The study indicated a 40 percent global increase in major hurricanes, of Category 3 intensity or greater by 2100. Joe Romm of Climate Progress noted that the study simulations indicated an increase of up to 20 additional North Atlantic hurricanes by 2100. Although this study contradicts earlier research, both past and current research agree that as oceans warm, both the intensity and precipitation of hurricanes will increase.
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http://www.climatecentral.org/news/study-projects-more-frequent-and-stronger-hurricanes-worldwide-16204 also: http://thinkprogress.org/climate/2013/07/09/2230491/july-9-news-new-study-says-unchecked-emissions-will-bring-up-to-20-more-hurricanes-per-year/