«If droughts continue to occur at 5 — 10 - year frequency, or increase in frequency, large areas of Amazonian forest canopy likely will be exposed to
the persistent effect of droughts and the slow recovery of forest canopy structure and function,» wrote researchers in a paper published in Proceedings of the National Academy of Sciences in December 2012.
On the other hand, another
effect of global warming, namely massive, continent - wide, intense,
persistent drought, could begin at any time and have catastrophic
effects on agriculture, leading to widespread famine within a few years.