Now that I have presented a few scientific works to answer your open-ended, indirect and improperly worded question, you have responded with your little temper tantrum. If you actually read the material the answers are there. The data and methods of every scientific publication regarding the effects of global warming on Hadley circulation and, in turn, on precipitation in the sub-Saharan regions are all clearly notated in the literature. Your steadfast refusal to absorb scientific material in any meaningful way indicates your idea of a satisfactory answer to your obtuse question must be a one sentence simplification of a complex issue and only acceptable then if it supports your own bias. It is now apparent that you are projecting, throwing out sarcasm and abbreviated slurs in a meager attempt to catch your balance now that you have had your mental legs knocked out from under you.