As reported in a new study published today (May 14, 2014) in the journal Nature, tropical storms don’t peak in the tropics as often as they did 30 years ago. Instead, more and more storms are reaching their maximum strength at higher latitudes. In other words, the tropics are becoming less hospitable for tropical cyclones, and the higher latitudes (north and south) are becoming less hostile as shown in the picture below.
These new results, based on the an analysis of historical storm data reveals that the tropics have widened by about a degree in latitude each decade since 1979 due to global warming and ozone loss. This expansion also could have pushed the ideal storm-forming regions toward the North and South poles.