[Beowulf9]

I have read that the Sahara has a cyclical periods of wetness, it becomes lush.

http://discovermagazine.com/2006/oct/sahara-desert-savanna-climate

[pepsi_junkie]

The last time the Sahara was a lush region was 10,000 years ago. There is a geologist who claims that the great Sphinx shows distinct signs of water erosion, meaning (he says) it has to be old enough to have been built during that wet period. If that’s the case then pretty much blows up most of our understanding of the rise of civilization.

[dsrtsage]

So, global warming is causing greening of the Sahel. The Atlantic Multi Decadal Oscillation is soon to switch to its “cool” phase. This will likely result in more droughtlike conditions within the next decade or two. Will the oncoming drought also be the result of global warming?