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The Sahara Desert is the largest desert in the world outside of Antarctica, located in northern Africa, with extremely harsh climatic conditions, making it one of the most inhospitable places on Earth for living things. The Arabic word Sahara means "great desert". It is located south of the Atlas Mountains and the Mediterranean Sea (about 35°N), north of about 14°N (250 mm rainfall contour), from the Atlantic coast in the west to the coast of the Red Sea in the east.
It runs through the northern part of the African continent, with a length of 5,600 kilometers from east to west and a width of about 1,600 kilometers from north to south, with a total area of about 9,065,000 square kilometers, accounting for about 32% of the total area of Africa. The name "Sahara" is derived from the Arabic language 1 3 1 5 1 9 1 9 1 3 and is introduced from the language of the Tuaregs, a local nomadic people, who in their language means "desert". The desert was formed about 2.5 million years ago.
The Sahara Desert begins on the Atlantic coast in the west, is bounded by the Atlas Mountains and the Mediterranean Sea in the north, reaches the Red Sea in the east, and reaches the Sudan and the Niger River valley in the south. The Sahara Desert is divided into several parts: Western Sahara; the mountainous central plateau (including the Ahagar Plateau in Algeria, the Eyre Plateau in Niger, and the Tibesa Plateau in Chad; The eastern part is the most inhospitable region, the Tenére Desert and the Libyan Desert.
The highest point in the Sahara Desert is Mount Kusi, located in the Tibes Plateau, at an altitude of 3,415 meters.
The Sahara Desert divides the African continent into two parts, North Africa and Southern Black Africa, which have very different climates and cultures, the southern border of the Sahara Desert is a semi-arid savanna, called "Sahel" in Arabic, and further south is Southern Africa, which is abundant in rain and lush vegetation, and is called "Sudan" in Arabic, which means black Africa.
Sahara, Arabic means great desert. The Sahara Desert stretches from the Atlas Mountains in northern Africa to the Sudanese steppe belt in the south, with a width of 1,300-2,200 kilometers. It stretches from the Atlantic Ocean in the west to the Red River in the east, with a length of 4,800 kilometers and an area of more than 7.7 million square meters.
The Sahara Desert is the largest desert in the world. The environment is unusually hot and dry, plants are poor, and animals are scarce. There are mainly shrubs such as miscanthus and acacia, and the main animals are ostriches, antelope, dromedary camels, etc.
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How did the Sahara Desert form, and what did scientists find in the desert?
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There are 800 billion grains of sand in the Sahara Desert, I have counted them. Ha ha. Because the Sahara region has a dry climate and no precipitation, soil erosion is very serious, resulting in large areas of desert.
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Let the sand density be 1450 kg m, the area of the Sahara Desert is 9.06 million square kilometers, the height is 320 m, and the side length is 9518 km, using the formula equal to m than v, v=20836234520000000000km, there are about 2 10 grains, that is, 2 billion trillion trillion grains.
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There are thousands of grains of sand, and they are too many to count. It is formed due to its special geographical location and the influence of subtropical high pressure.
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Trillions of sand are formed by the accumulation of wind-blown stones.
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How can it be? I grabbed another handful and threw it inside.
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There are five main reasons for the formation of the Sahara Desert: because it is located on both sides of the Tropic of Capricorn, it is controlled by the subtropical high pressure zone all year round, and the dry and hot downdraft prevails, and the northern part of the African continent is wide, and the range controlled by the subtropical high pressure belt is large, and the area of solid dry heat is wide; North Africa is close to the Asian continent, and the northeast trade winds blow from the eastern land, which is not easy to form precipitation, making North Africa even drier. The coastline of North Africa is too straight, with the Ethiopian plateau on the east side, which prevents the moist air flow from entering the interior; The Canary cold current passes through the west coast of North Africa, which has a cooling and dehumidifying effect on the western coastal areas, bringing the desert closer to the west coast. The terrain of North Africa is relatively homogeneous, with flat terrain and small undulations, plus a single climate, forming a large desert area.
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The formation of the Sahara Desert is due to the prevailing downdrafts controlled by the subtropical high, the cooling and dehumidification of cold snaps, the drying of northeast trade winds, and the dry climate blocked by mountain ranges.
Affected by the subtropical high pressure zone.
Located on both sides of the Tropic of Cancer, it is controlled by the subtropical high pressure zone all year round, and the dry and hot downdraft prevails, and the African continent is narrow in the south and wide in the north, with a large range of pressure zone control and a wide dry and hot area.
Trade winds influence. North Africa is close to the Asian continent, and the northeast trade winds blow from the eastern land, which is not easy to form precipitation, making North Africa even drier.
Mountains block. The coastline is straight, with the Ethiopian plateau on the east side, which acts as a barrier to the humid air currents, so that the vast inland area is not affected by the sea, and the climate is dry.
Cold snap effects. The Canarian cold current passes through the west coast, which cools and dehumidifies the western coastal areas and brings the desert closer to the west coast.
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The remnants of the tropical fauna of the northern Sahara Desert include tropical stingers and cries, both found in Algis.
an isolated oasis in the Biskra and Sahara deserts of Leah; Cobras and small crocodiles may still be living in the river basins of the distant Tibesti Mountains. Mammalian species include gerbils, jerboas, Cape hares, and desert hedgehogs; Berberry sheep and sickle-horned oryx, Dogas antelope, Dama deer and Nubian wild ass; Annubis baboons, spotted hyenas, jackals in general, and sand foxes; Libyan white-necked ferret and slender mongoose. There are more than 300 species of birds in the Sahara Desert, including non-migratory and migratory birds.
The coastal strip and inland waterways attract many species of waterfowl and shorebirds. Inland birds include ostriches, various grabbing birds, herons, eagles, pheasants and Nubian bustards, desert eagles, barn eagles, sand larks and limestone swallows, as well as brown-necked and fan-tailed ravens. Frogs, toads, and crocodiles live in lakes and pools in the Sahara Desert.
Lizards, evaders, skinks and cobras infest rocks and bunkers. Lakes and pools in the Sahara Desert contain algae, saltwater shrimp and other crustaceans. Snails that live in the desert are an important food for birds and animals**.
Desert snails survive summer hibernation and remain inactive for several years before being awakened by rainfall.
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There are many terrifying creatures in the desert, such as the Australian spiny horned lizard, the armadillo ring lizard, the Kenyan sand python, the rattlesnake, the Arizona desert golden scorpion, etc. The Australian spiny horned lizards live in the Australian outback, and these lizards are able to replenish their water intake by covering their bodies with sand, and their ** use a crease-like straw to absorb water.
The armadillo ringed lizard lives in the desert off the west coast of South Africa and has a layer of heavy armor on its exterior that curls into tight balls when they feel threatened. The scales cover their neck, body, and tail and are almost indestructible.
Rattlesnakes are also common creatures in the desert, with a string of rings at the end of their tails, which can make loud noises for long periods of time when encountering enemies or when moving sharply, so that enemies do not dare to approach or be scared away. It is also a venomous snake.
The Arizona Desert Golden Scorpion excels at ambushing its prey. They mostly bury themselves under sand and stones, and attack insects and small vertebrates with their stings, and then bite prey immobilized due to poisoning with their mouthparts.
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The Sahara Desert has a dry climate and a harsh living environment, but there are still many animals living on this land, such as:
Horned pit vipers, jerboas, Tibetan antelopes, fennec foxes, African ostriches, fawn gazelles, dung beetles, Israeli golden scorpions, rattlesnakes, camels.
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The Sahara Desert is the largest desert in the world, located in northern Africa, on the Tropic of Capricorn. It is a place that many explorers want because of the abundance of resources in the Sahara Desert. But this place is not suitable for living things, and there are many reasons for this.
I think the most important thing is because its climate is too harsh. <>
The Sahara Desert covers an area of more than 9 million square kilometers, which is about the size of China, and the Sahara Desert is bordered by the Atlantic Ocean in the northwest, the Mediterranean Sea in the southwest, and borders the Arabian Peninsula. The Sahara Desert was formed millions of years ago, mainly because the area of the ocean was decreasing, which led to the weakening of the summer monsoon, so that an arid climate was formed, and the gradual reduction of the size of the oases also led to the formation of deserts at an accelerated rate. <>
There are also very few creatures in the Sahara Desert, as most of them are almost impossible to survive here. The local precipitation is scarce, the climate is dry, and because it is near the Tropic of Capricorn, the sun shines for a long time, receives more heat, so it is also very hot, and the temperature is high during the day, and at night due to more yellow sand, the heat dissipation speed is faster, so that the local night temperature drops quickly, and the temperature difference between day and night is very large, which also makes the creatures unsuitable for survival. There is also very little precipitation, but a lot of evaporation, which also makes it impossible for most organisms to survive.
In fact, there are some organisms in the Sahara Desert, such as some heat-tolerant and drought-tolerant plants, some birds, and there are also many ectotherms, such as crocodiles, etc., as well as some birds, which also form a food chain. <>
In the 50s of the 20th century, many experts discovered a lot of oil, natural gas, iron ore and other mineral resources in the Sahara Desert through technical means, which also surprised the world. Finally, it is hoped that we will be able to make the most of the resources of the Sahara Desert without destroying the local biodiversity.
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Because there is less water on the desert, and there is very little food for living things, and it is located in a remote area, there is little precipitation; He experienced the erosion of very severe natural disasters.
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It is because the environment of the Sahara Desert is very harsh, so it is difficult for organisms to survive. It has taken a long time to get to where we are now.
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Because the Sahara Desert not only has very long sunshine hours, but also very hot, it is difficult for ordinary creatures to survive in such an environment, and the Sahara Desert has also experienced many years of wind and sun and desertification to become what it is now.
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The natural environment of the Sahara Desert is very harsh, and after the vicissitudes of the Sahara Desert, there is sand everywhere in the pan. Organisms are difficult to survive.
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