meemoe_uk wrote: North and south sahara and parts of the now Arabian desert had grasslands around 11,000-4000BC, until the herds were replaced by staple crops fields which turned to desert.
http://en.wikipedia.org/wiki/North_African_climate_cyclesNorth African Climate Cycles have a unique history that can be traced back millions of years. The cyclic climate pattern of the Sahara is characterized by significant shifts in the strength of the North African Monsoon. When the North African Monsoon is at its strongest annual precipitation and subsequent vegetation in the Sahara region increase, resulting in conditions commonly referred to as the “green Sahara”. For a relatively weak North African Monsoon the opposite is true, with decreased annual precipitation and less vegetation resulting in a phase of the Sahara climate cycle known as the “desert Sahara”.[1]
Variations in the climate of the Sahara region can at the simplest level be attributed to the changes in insolation due to slow shifts in Earth’s orbital parameters. These parameters include the precession of the equinoxes, obliquity, and eccentricity as put forth by Milankovitch theory.[2] The procession of the equinoxes is regarded as the most important orbital parameter in the formation of the “green Sahara” and “desert Sahara” cycle.
Keith_McClary wrote:Years ago I heard a theory that goat herding caused the desertification of the Biblical "land of milk and honey" and North Africa and the Mideast. I took it sort of seriously because of it's "urban legend" appeal and because I had no personal ambitions in the goatherding profession.
Now it seems this is a pile of shit. Or rather, a pile of shit is the solution to the problem.
dohboi wrote:What lore said.
I'd just add that, even more important than grass, you need water.
The grass needs some of it.
The grazers need lots of it.
But it is exactly water that will be in shorter and shorter supply.
Something like this is still a good idea to try in many areas. It's just not going to be quite the panacea some think.
careinke wrote:dohboi wrote:What lore said.
I'd just add that, even more important than grass, you need water.
The grass needs some of it.
The grazers need lots of it.
But it is exactly water that will be in shorter and shorter supply.
Something like this is still a good idea to try in many areas. It's just not going to be quite the panacea some think.
I'm guessing, based on your comments, that you and Lore did not watch the video. Watch the lecture, and come back when you can discuss this with a little better background on the subject.
but not their bison relatives?Lore wrote:herds of cattle, little methane bombs
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