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The largest is the Sahara Desert, with extremely harsh climatic conditions, and is one of the most inhospitable places on earth for life, located in the Atlas Mountains and south of the Mediterranean Sea (about 35°N), about 14°N (250 mm of rainfall contours), 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.
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Geographically, the world's deserts are concentrated in 13 regions, and the deserts formed by climatic factors are concentrated in the north and south latitudes of 15°-35°. The deserts of the southern hemisphere start from the Kalahari and Namib deserts on the Atlantic coast, pass through the Indian Ocean, pass through the Australian desert, and cross the Pacific Ocean to the Atacama Desert in South America; The deserts of the northern hemisphere start from the Sahara Desert on the Atlantic coast, cross the Suez Canal, cross the Red Sea, pass through the Arabian Desert, pass through Iran, Afghanistan, the Thar Desert in India, cross the Pacific Ocean, and reach the southwest of North America.
The deserts formed by topographic factors are mostly distributed between 35° and 50 °N latitude in the northern hemisphere, and are concentrated in central Asia and the western United States. China's desert area accounts for the total land area, concentrated between 37° and 43° north latitude, and the Taklamakan Desert is the largest desert in China.
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Most of them are located inland, and the monsoon is not obvious. Because the monsoon does not bring precipitation to areas that are heavily inland or blocked by high mountains, over time it will become a desert.
Most of the world's deserts are located in the range of 15-35 degrees north and south latitudes.
It is located in the subtropical high pressure zone, which is arid and rainless, so it is mostly desert.
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Summary. The Wusu Desert is located north of the first line of the Great Wall of Yulin, Shaanxi Province, so Yulin City is also known as the Camel City, which means the city of the desert. The Mu Us Desert covers an area of about 10,000 square kilometers.
Precipitation is high (250 400 mm), which is conducive to plant growth, and it is a relatively developed area of animal husbandry, with large areas of fixed and semi-fixed dunes. Since 1959, people have vigorously built windbreak belts, diverted water to pull sand, diverted floods and silted land, and carried out huge projects to transform the desert. By the beginning of the 21st century, more than 6 million acres of sandy land had been remediated, and the sand was stopped and greened.
Eighty percent of the Mu Us Desert has been brought under control, soil and water have been lost, and the annual sediment transport of the Yellow River has been reduced by 400 million tons. Thanks to good precipitation, many sandy areas are now woodlands, meadows and fertile fields. In the hinterland of the desert, Yulin City has also accumulated 1.6 million acres of new farmland, and Yulin, the "desert capital", has become a "desert oasis".
On April 22, 2020, the Shaanxi Provincial Forestry Bureau announced that the desertified land management rate in Yulin has reached the level, which means that the Mu Us Desert is about to "disappear" from the territory of Shaanxi. [1]
Good. Can the question be filmed?
Ah, this is our high school exam question, I just finished the exam, and I can't take out the exam paper.
The Wusu Desert is located north of the first line of the Great Wall of Yulin, Shaanxi Province, so Yulin City is also known as the Camel City, which means the city of the desert. The Mu Us Desert covers an area of about 10,000 square kilometers. Precipitation is high (250 400 mm), which is conducive to plant growth, and it is a relatively developed area of animal husbandry, with large areas of fixed and semi-fixed dunes.
Since 1959, people have vigorously promoted and shouted to build a forest belt to defend the Zhengye wind, divert water to pull sand, divert floods and silt land, and carried out a huge project to transform the desert. By the beginning of the 21st century, more than 6 million acres of sandy land had been remediated, and the sand was stopped and greened. Eighty percent of the Mu Us Desert has been brought under control, soil and water have been lost, and the annual sediment transport of the Yellow River has been reduced by 400 million tons.
Thanks to good precipitation, many sandy areas are now woodlands, meadows and fertile fields. In the hinterland of the desert, Yulin City has also accumulated 1.6 million acres of new farmland, and Yulin, the "desert capital", has become a "desert oasis". On April 22, 2020, the Shaanxi Provincial Forestry Bureau announced that the desertified land management rate in Yulin has reached the level, which means that the Mu Us Desert is about to "disappear" from the territory of Shaanxi.
1] Is Mu Us the northern region that belongs to the four major geographical regions of our country?
Hello. That's right.
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Deserts are arid landforms.
Desert, the full name of sandy desert, refers to a barren area where the ground is completely covered by sand, plants are very scarce, rain is scarce, and the air is dry, accounting for about one-third of the earth's landmass. In addition to natural formation, it will also be formed due to unreasonable auspicious farming, overgrazing and other reasons.
Arid landform refers to the landform that develops in arid climate zones. The annual precipitation in arid areas generally does not exceed 200-250 mm, and most of them fall in the form of heavy rainfall. The vegetation is scarce, the temperature difference between day and night is large, the physical weathering is strong, the wind is strong, and the desert is developed.
Its landforms are mainly aeolian landforms and temporary flowing water landforms, such as sand dunes, Gobi, dry gullies and alluvial fans. The desert is a paradise for archaeologists with occasional mineral deposits and oil deposits, few inhabitants, and a dry climate that is conducive to the preservation of human artifacts and fossils from earlier periods.
What plants are in the desert
Plants that can survive in desert environmental conditions are mainly characterized by drought resistance, and the leaves of general desert plants are relatively small to reduce water loss caused by transpiration, mainly represented by cactus, singles, aloe vera and so on. They are very good at growing and very tolerant to heat and drought.
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The Sahara Desert is the largest desert in the world outside of Antarctica, located in northern Africa from the Mediterranean Sea in the north to the Sudanese steppes in the south. It is located south of the Atlas Mountains and the Mediterranean Sea (about 35°N) and north of about 14°N (250 mm contours).
The main topographical features of the Sahara Desert include shallow, seasonally flooded basins and large oasis depressions, rocky highlands, steep mountains, and sandy beaches, dunes and sand seas.
The highest point in the desert is the summit of the 3,415 m (11,204 ft) Koussi Mountains, located in the Tibesti Mountains in the territory of Chad; The lowest point is 133 metres (436 ft) below sea level, in Egypt's Qattara depression.
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The Sahara Desert is the largest desert in the world. It is located south of the Atlas Mountains and the Mediterranean Sea, about north of the 14° north latitude (250 mm rainfall contour), from the Atlantic coast in the west to the shores of the Red Sea in the east.