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About The Largest Deserts in the World

A desert is the most barren and unfriendly terrain, which is a vast space, where rainfall is rarely less than 25 cm per year. Under such dry conditions it is hard for the plants to live and the soils to form. There is anything that protects the earth from overheating in these areas. The hottest  place on the Earth is the tropical desert, but there are coldest , even icy deserts, for instance,  Antarctica.Deserts cover approximately 20% of the Earth's land surface and 80% in Australia , therefore, a fifth of the Earth's land area belongs to the deserts. Many of the major deserts are located near the tropics, such as the Sahara desert which is the largest desert in the world, as well as the Kalahari, the Namib Desert and the Grand Victoria in Australia.

 

Droughts

 

During the grazing of cattle during droughts disorders of vegetation occur. They are so significant that are likely unrecovered. The sun's rays quickly dry the soil and turn to dust, which happens to desertification, a continuous transformation of the land in the desert. A desert with a change in climatic conditions can always shrink and expand. The long-term global climate change or contraction of the continents can garden the desert or turn it into a magnificent forest. Short-lived changes in weather conditions influence the expansion of its borders, turning occasionally green areas in arid deserts. The hottest places on the Earth are the tropical desert, where the daytime temperatures often reach +50 ° C. This heat can destroy the stones and give the landscape an unusual character. The underground water evaporates so quickly that minerals are dissolved from the crust. Deserts are constantly dry, but in other natural areas prolonged dry periods can occur - the droughts. Their presence in any place depends on what kind of rainfall is there. There was a drought in Sahel, Africa, that lasted many months without rain. However, droughts are regular and in some places they are with a typical moisture content, such as the North American grasslands which dry up every 22 years. Water plays a significant role in shaping the dry landscape, despite of its low quantity in the desert .Water alters the chemical composition of rocks, now and then it is dumped in the desert from the sky, at times becoming the cause of short, but strong flash floods, which are harmful to the soil.

 

Do all the deserts have very high temperatures and a lot of sand?

 

We call a desert an area where not more than 25 inches of rain falls per year. As a rule, deserts are formed in the hot desert climates, but there are exceptions. Most deserts have a lot of rocks and stones and sand.

 

What is the biggest desert?

 

The most extensive deserts are located in areas of high atmospheric pressures. All the winds blow in areas of their inner regions, but the moist winds from the sea reach them very rarely. There are those deserts, which are near the sea, and yet the sea winds will reach them, they lose most of moisture on the way. Certain deserts are formed on the internal continental slopes of mountain ranges, well sheltered from the sea winds. Almost all of Antarctica is a huge frozen desert, which is located in an area of high pressure, so that its interior is extremely small drops of fresh snow.

 

The driest desert in the world.

 

In many deserts there is no rain for several years in a row, then a short downpour happens and everything starts all over again. The most arid desert is the Atacama Desert in South America . Until 1971, there were 400 years without spilling a drop. It is known that in several places in the desert, there are artesian waters, but the high boron content makes them unsuitable for irrigation.

 

What is an oasis?

 

An oasis is a plot of land in the desert, which is covered with vegetation. It feeds from underground springs or natural wells.

 

The largest desert in the world

 

The largest desert in the world is the Sahara Desert in North Africa. Its area is of approximately 8400 sq. km. However, only ten percent of its territory is covered with sand, and everything else is taken by bare rocks and stones. After Sahara, we have the Arabian desert, the Gobi, the Patagonian,the  Rub’ al Khali, the Great Victoria, the Kalahari, the Great Basin, the Chihuahuan and the Thar.


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The Sahara Desert, North Africa

The Sahara is the largest desert in the world. Its area is more than 9 million square kilometers. It covers almost the whole of North Africa: Egypt, Tunisia, Morocco, Mauritania, Niger, Sudan, Libya, Algeria, etc. In fact, the Sahara Desert is 30% of the entire African continent. This is the hottest hot spot in the world with summer temperatures often exceeding 57 degrees Celsius...

The Arabian Desert

The Arabian Desert is a vast desert area that goes from Yemen to the Persian Gulf , from the Oman to Jordan and to Iraq . The desert occupies most of the Arabian Peninsula and stretches over 222,070 square km. The Rub 'al-Khali houses at the center and it is one of the largest stretches of sand on the planet. Its fauna includes gazelles, oryx , sand cat , lizard, uromastyx , and more others. The climate is very dry and with high da...

The Kalahari Desert, Africa

The Kalahari Desert is located mainly in Botswana and its boundaries are the Orange River and the Okavango. The soil of the desert is covered with reddish grass and shrubs, in the east mostly sandy soil. On flat surfaces red and white sands that make up the gentle dunes. In the north there are woodlands, grasslands with acacias and baobabs. There is 1000 mm of rainfall per year. But the south is not as thick. The specy of tree which p...

The Thar Desert

The Thar Desert, also known as the Great Indian Desert , is a large, arid region in the north-west of the subcontinent of India . With an area of 200,000 square kilometers , the desert is the seventh in the world by extension. It is found mostly in the Indian state of Rajasthan , and extends in the southern states of India of Punjab , Haryana and north Gujarat. In Pakistan the des...

The Chihuahuan Desert

The Chihuahuan desert stretches from the United States of America and Mexico . In the U.S. it occupies the valleys of southern New Mexico , the western part of the path of the river Pecos in Texas and the south-east area of Arizona , in Mexico covers the northern half of the state of Chihuahua , most of Coahuila , the north-east of Durango , the most northern state of Zacatecas and a small area west of Nuevo Leon . It has an area ...

The Gobi Desert

The Gobi desert occupies the entire southern part of Mongolia (about one-third of the country). The name itself is translated from the Mongolian language meaning barren terrain. Since ancient times this area was known as the Shamo desert. The territory of the Gobi desert occupies the entire southern half of Mongolia and the northern provinces of China. This covered stones plain was called by a Chinese the...

The Patagonia Desert

Patagonia, part of South America is located south of the Rio Colorado river (in another version the Rio Negro and Limaj ) in Argentina and the Bio-Bio in Chile , though absolutely precise definition does not exist. Sometimes it is referred to Patagonia and Tierra del Fuego . Located in Argentina and Chile, it includes the Andes mountains in the west and in the south, and plateaus and low plains to the ea...

The Great Basin Desert

The Great Basin, the largest undrained region of North America occupies the highlands , stretching from the north to the south and it is bounded on the west ridge with the Sierra Nevada and the Mountains Cascade and in the east with  the Rocky Mountains. Its area is more than 500 000 km ². The relief is a set of ...

The Rub Al Khali Desert

A significant part of the Arabian Peninsula is probably the most arid desert in the world. It was called the Rub al-Khali. Rub al-Khali is a vast sandy desert in the Middle East which occupies the southern third of the Arabian Peninsula , one of the largest deserts in the world . It is one of the hottest (average maximum in July and in August is 47 ° C, the mark at 50 ° C...

The Great Victoria Desert, Australia

The Great Victoria Desert is a sandy-saline desert in Australia (the states of Western Australia and South Australia ). It has an area of 424 400 km ², while the length from the east to the west is over 700 km. To the north of the desert is the Gibson desert , to the south the Nullarbor Plain . Due to the adverse climatic conditions (arid climate) there is not any agricultural activity in the desert. ...


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