The Sahara Desert, formed about 2.5 million years ago, is the second largest desert in the world after Antarctica and the largest sandy desert in the world.
It covers an area of 9.06 million square kilometers and is located in northern Africa.
The climate in this area is very harsh, and it is one of the most unsuitable places on earth for living things.
"Sahara" is an Arabic transliteration. In Arabic, "Sahara" is a great desert. It originates from the Tuareg language of the local nomadic people, which means "great desert".
撒哈拉沙漠形成于约250万年前，是世界仅次于南极洲的第2大荒漠和世界最大的沙质荒漠。
面积约906万平方千米，位于非洲北部。
该地区气候条件非常恶劣，是地球上最不适合生物生存的地方之一。
“撒哈拉”是阿拉伯语的音译，在阿拉伯语中“撒哈拉”为大沙漠，源自当地游牧民族图阿雷格人的语言，原意即为“大荒漠”。
扩展资料：
撒哈拉沙漠形成原因：
1、北非位于北回归线两侧，常年受副热带高气压带控制，盛行干热的下沉气流，且非洲大陆南窄北宽，受副热带高压带控制的范围大，干热面积广。
2、北非与亚洲大陆紧邻，东北信风从东部陆地吹来，不易形成降水，使北非更加干燥。
3、北非海岸线平直，东侧有埃塞俄比亚高原，对湿润气流起阻挡作用，使广大内陆地区受不到海洋的影响。
4、北非西岸有加那利寒流经过，对西部沿海地区起到降温减湿作用，使沙漠逼近西海岸。
5、北非地形单一，地势平坦，起伏不大，气候单一，形成大面积的沙漠地区。
参考资料来源：百度百科-撒哈拉沙漠
THE Sahara desert is the world’s largest desert area. It extends from the Africa’s Atlantic Ocean side to the Red sea and consists of the countries of Morocco, Algeria, Tunisia (突尼斯), Libya, Egypt, Mauritania (毛里塔尼亚), Mali, Niger（尼日尔）, Chad（乍得）, and Sudan. It is about 5,200 miles long. Overall, the Sahara desert covers 3,500,000 square miles.
The geography of the desert is varied. In the west, the Sahara is rocky with varied elevation. It does contain underground rivers, which sometime penetrate the surface, resulting in oases.
The central region of the Sahara has more elevation than the other areas, with peaks such as Tahat. Even though the area lacks rainfall, these peaks are snowcapped during the winter. The eastern part of the Sahara, the Libyan desert, is dry with very few oases.
The Sahara’s climate is very hot and dry. Although it is very hot during the day, it does become cold at night.
The Sahara used to be a fertile area in which elephants, giraffes and other animals grazed. It is estimated that in 4,000 BC, the climate began to get drier. The fertile landscape dried up and the desert widened, creating the form that appears today.
(SD-Agencies)本回答被提问者采纳
写了三毛离开家去了撒哈拉沙漠生活，并且和荷西结了婚。其中发生了很多事情。例如：看沙漠中的女人洗澡很好奇，并且她们内外都洗澡；不小心在家门口捡了条项链，却因此而差点丧命；利用自己的医术帮助邻居们；在宴会上遇到了哑奴并且十分尊重他；去和荷西找化石的时候差点被人侮辱；看到10岁的女孩出嫁很可惜；成为第一位考得驾照的女人；与荷西一起打渔；驾着她的“白马”帮助路上的行人；在外人侵入小镇是坚决不走......
The Sahara Desert is an ecoregion covering part of the Sahara.
The Sahara is the world's second largest desert (Antarctica is the largest) and is located in northern Africa. It stretches from the Red Sea to the highlands of Ethiopia. However, the Sahara encompasses regions significantly different from an ecological perspective. The surface of the desert ranges from large areas of sand dunes (which are called erg), to stone plateaus (hamadas), gravel plains (reg), dry valleys (wadis), and salt flats. The northern and southern margins also receive more rainfall and have greater vegetation than central Sahara. The very scarse rain (less than 25 mm and even less than 5 mm per annum in the east) can fall in any season and in a very irregular way : some areas may receive no rain for years then suffer intense storms. Some areas encompass vast underground aquifers resulting in oases, while other regions severely lack water reserves. Some mountains (Ahaggar, Tassili N’Ajier, Tibesti, Aïr) also rise up in the desert and receive more rainfall and mostly present slightly cooler summer temperatures.
For such reasons, the great Sahara may be divided in several ecoregions and each of them be separately described. Other ecoregions are