Why grasslands will become wetter because of global warming?

Question

Why grasslands will become wetter because of global warming?

Answer 1

Ice caps melting -> rise in water levels -> warmer temperatures -> more hurricanes -> more rain.

Answer 2

This depends on the original climate years ago and how it is changing up through today.

If you look at various grassland areas in Africa, they are experiencing less and less rain as the years go by.  I'm not familiar w/ Africian weather patterns, but savannahs are drying out and dying out.  They encounter more and more, longer and longer droughts and they turn more into a wasteland than a grassland.

And there are other areas that are getting more rain because the weather systems are picking up more energy/heat from the water sources (oceans, lakes, etc) and the global climate in general is getting warmer.  Bodies of water are getting warmer, thus weather systems suck up more moisture and dump more rain.  A good example is around the Northern shores of the Gulf of Mexico.  While Georgia is going through a drought, weather systems that pick up more and more moisture end up dumping it on the midwest and Northeast.  We're flooding here in IL and we had dozens of tornado touch-downs this past week.  And we're in January!  Imagine the snowfall if our temps would have been below 32 degrees.

So global warming spells out more energetic weather patterns where they are generally wet, and more heat and drought where it's generally dry.