Sahara Desert is located in the north of Africa, covering an area of 9.065 million square kilometers, 27 times that of Taklimakan Desert, larger than the whole of Oceania, and almost equivalent to the land area of China and the United States. The name Sahara comes from Arabic and is introduced from the language of Tuareg, a local nomadic people. In their language, it means desert. The Sahara desert was formed about 2.5 million years ago.
In the last ice age, the Sahara was not a desert, and the climate was similar to that of East Africa. About 30,000 ancient rock paintings were found in the desert, about half of which were on Acer Plateau in southern Algeria, depicting animals in rivers, such as crocodiles. At the same time, dinosaur fossils were also found. But since 3000 BC, there has been almost no large area of vegetation in the Sahara except the Nile Valley and oases scattered in the desert.
Climatic characteristics of the Sahara desert;
The Sahara desert has extremely harsh climatic conditions and is one of the most unsuitable places for biological growth on earth. Sahara means great desert in Arabic, which is the most sunny place in the world and the largest desert with the worst natural conditions in the world.
The climate of the Sahara desert is controlled by the north-south transition of the trade winds, and there are often many extreme situations. It has the highest evaporation rate in the world, and has the largest area record of no rain for several years. At high altitude, the temperature can reach frost and freezing, while at low altitude, the hottest weather in the world can be found.
Baidu Encyclopedia-Sahara Desert