How does global warming contribute to increase and severity of the following storms hurricanes tornadoes typhoons melting glaciers?

Answer 1

To start off, melting glaciers are not a kind of storm. Glaciers are made of ice, which melts at warm temperatures. A warmer climate means that there is more summer melting of glacial ice and more time of the year spent melting ice rather than accumulating it.

Hurricanes and typhoons, which are essentially the same thing, are fueled from warm, moist air that gets its moisture from warm ocean water. Warmer temperatures would lead to warmer oceans and thus more warm, moist air to fuel hurricanes and typhoons. So far there has been no substantial evidence of such an increase, perhaps because of other factors that influence these storms. Some climate models, for instance, predict that global warming will increase wind shear over the Atlantic, leading to fewer hurricanes.

The case for tornadoes is similar. Tornadoes are spawned by severe thunderstorms, which are fueled by warm, moist air. A warmer climate might provide more energy for such storms, but again, temperature is not the only factor. In fact, the number of significant tornadoes striking the United States has actually decreased since the middle of the twentieth century.