Global warming caused by human activity is raising the temperature of the world's oceans as well as increasing their evaporation. These two factors are exacerbating the strength of hurricanes. Even a small increase in the ocean's warmth can turn more tropical disturbances into hurricanes or pump up an existing storm's power and add to its rainfall. Nevertheless, the number of hurricanes in any given year is strongly influenced by seasonal ocean patterns. Learn more in this article, "Warmer Oceans, Stronger Hurricanes", from the July 2007 edition of Scientific American
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©2007 Scientific American