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The first view is that a sudden climate change caused the once-fertile region of the Sahara to turn to desert. Computer simulations have indicated that, over a period of just several hundred years following an abrupt climate shift some 4000 years ago, the grasslands of the Sahara gave way to the desert, while summers became longer and hotter. This belief was backed up by the presence (and age) of marine sediments in the region.
The second view retains the concept that climate change caused the difference, but that it occurred much more slowly, over thousands of years rather than just hundreds. Global warming is aactually causing a renewal of green growth in some areas.
Either way, climate change appears to have been the cause.
What else can I help you with?
What physical feature formed the southern boundary of the roman empire?
The Sahara Desert was the southern border of the roman empire
What large desert formed a natural barrier to the west of Egypt?
Sahara
What was the name of the groups that were formed to cross the Sahara Desert safely?
Caravans allowed a bit more safety to groups traveling in the Sahara.
Did overgrazing create the Sahara?
No, overgrazing did not create the Sahara Desert. The Sahara Desert was formed as a result of shifts in the Earth's climate and tectonic plates over millions of years. Human activities like overgrazing and deforestation can exacerbate desertification, but they were not the primary cause of the Sahara.
Are hurricanes formed over the Sahara Desert?
No, hurricanes must form over the ocean.
What is the desert inside of the Sahara desert?
The Libiyan Desert is inside the Sahara desert.
Largest desert in the sahara is in?
Sahara is A desert. ONE desert. It is Not divided into sub-deserts. Sahara is in Africa.
In what continent is the Sahara desert located?
The Sahara desert is located in northern Africa.
The worlds largest desert in the Sahara?
Sahara is A desert. ONE desert. It is Not divided into sub-deserts. Sahara is in Africa.
Is the Sahara desert in Chile?
No the Sahara desert is in Africa.
Is the Sahara desert in north or south America?
No The sahara desert is not in North America The sahara desert is not in South America.
What birds are in the Sahara Desert?
The birds that live in The Sahara Desert are: The Desert Eagles.
