According to the Geophysical Fluid Dynamics Laboratory (GFDL), both the frequency and intensity of hurricanes is likely to increase due to global warming. The destructive power of storms will increase. Rainfall is likely to increase by as much as 20% in any given storm. What this means is that while the number of storms isn't likely to increase, the number of storms upgraded to hurricanes is.
So how do these storms that can upend our best-laid plans form and grow? The oversimplified answer: Warm ocean water plus the Earth's eastward rotation.
"They're heat engines," said meteorologist Jeff Masters of the website Weather Underground. "They take heat from the oceans and convert it to the energy of their winds. They're taking thermal energy and making mechanical energy out of it."
The natural engine that is a hurricane is fueled by warm, moist air. The storms move heat from the ocean surface high into Earth's atmosphere. They can travel thousands of miles from the tropics toward the Earth's Poles.
It seems that the debate on global warming, and whether it actually exists, is an on-going argument that has not yet reached a conclusion. But all we have to do is look at the weather patterns around us. As the earth's temperature has risen, so has the number of hurricanes reported each year. This is a very dangerous trend and to be responsible citizens of the world, we need to acknowledge that global warming and the rising number of hurricanes are at the very least related to each other.
I think we are seeing the same number of hurricanes we always have, when you average it out over a long period of time. Some years there are more, some there are less, but on the whole I don't think there is anything out of the ordinary going on as a result of global warming.