Why is there no water in the desert? Dry rain as a unique phenomenon of the desert Does it rain in the desert?

why it rarely rains in the desert and why there is a lot of sand there and got the best answer

Answer from plane planes[guru]
Deserts arise where dry air ALWAYS comes, from which all the rain has already poured out before. Sand is small pebbles of a certain size, why are there no pebbles of a different size in the desert? Because smaller ones are carried away by the wind (from the Sahara, to the very middle of the Atlantic Ocean, for example), and larger ones cannot be moved by the wind, so they roll in the wind, forming sand dunes and pebbles of only one size.

Answer from ~+ Katty +~[active]
An area is considered a desert if it receives no more than 25 cm of precipitation per year. As a rule, deserts form in a hot climate, but there are exceptions. Most deserts have a lot of rocks and stones and very little sand. In many deserts there is no rain for several years in a row, then there is a short downpour, and everything starts all over again. The driest is the Atacama Desert in South America. Until 1971, not a drop had been spilled there for 400 years. Artesian waters are known to exist in several places in the desert, but their high boron content makes them unsuitable for irrigation.

Answer from Rafael ahmetov[guru]
The question is turned upside down. It is not in the desert that it rarely rains and there is a lot of sand, but on the contrary, deserts are formed where it rarely rains and there is a lot of sand. The rains come from the clouds. Clouds bring cyclones. Cyclones form mainly on the coasts of seas and oceans. While the cyclones reach the central regions of the continent, all the water from the clouds in the form of rain spills along the road, so there is little rain in the central regions of the continents. If the soils are not sandy, then the water remains on the surface (absorbed shallowly into the soil), so the existence of vegetation is possible. If there are sandy soils, then water from rare rains easily seeps deep into the sand and there is little water on the surface. Plants don't have enough water and don't grow. Such a place is called a desert.

Answer from Anna Osadchaya[guru]
The rain comes from the evaporation of water, of which there is a lot in the desert =)))

Answer from Yoman Kavun[expert]
WHY IS THERE NO WATER IN THE DESERT?
What is a desert? A desert is a region where only special forms of life can exist. All deserts lack moisture, which means that existing life forms had to adapt to survive without water.
The amount of precipitation determines the volume and types of plant life in the region. Forests grow where there is sufficient rainfall. Grass cover is common where there is less rainfall. Where there is very little precipitation, only certain plant species characteristic of deserts can grow.
Hot deserts near the equator, such as the Sahara in Africa, are located in the subtropical zone, where sinking air becomes warmer and drier. The land in these areas is very dry, despite the proximity of the ocean. The same can be said about the deserts in northwestern Africa and western Australia.
Deserts located far from the equator were formed due to their distance from the oceans and their moist winds and due to the presence of mountains between the desert and the sea. Such mountain ranges trap rain on their seaward slopes, while their reverse slopes remain dry.
This phenomenon is called the “rain barrier” effect. The deserts of Central Asia are located beyond the barrier of the Himalayan mountains and Tibet. The deserts of the Great Basin, in the western United States, are protected from rain by mountain ranges such as the Sierra Nevada.
Deserts vary greatly in appearance. Where there is enough sand, winds create sand hills, or dunes. There are sandy deserts. Rocky deserts consist mainly of rocky soil, rocks that form fantastic cliffs and hills, as well as uneven plains. Other deserts, such as those in the southwestern United States, are characterized by barren rocks and arid plains. Winds erode tiny soil particles, and the gravel that remains on the surface is called “desert pavement.”
Most deserts support a variety of plant and animal species. Plants growing in deserts have virtually no leaves to reduce the evaporation of plant moisture. They may be equipped with thorns or thorns to repel animals.
Animals living in deserts can go without water for a long time and obtain water from plants or in the form of dew.

Deserts have always been distinguished by a very arid climate, the amount of precipitation is many times less than the amount of evaporation. Rain is extremely rare and usually comes in the form of heavy downpours. High temperatures increase evaporation, which increases the aridity of deserts.

The rain that falls over the desert often evaporates before it even reaches the surface of the earth. A large percentage of the moisture that falls on the surface evaporates very quickly, only a small part ends up in the ground. Water that gets into the soil becomes part of the groundwater and moves over vast distances, then comes to the surface and forms a source in the oasis.

Desert irrigation

Scientists are confident that most deserts can be turned into blooming gardens with the help of irrigation.

However, great care is needed here when designing irrigation systems in the driest zones, because there is a great danger of huge losses of moisture from reservoirs and irrigation canals. When water seeps into the ground, a rise in the groundwater level occurs, and this, at high temperatures and an arid climate, contributes to the capillary rise of groundwater to the surface layer of soil and further evaporation. Salts dissolved in these waters accumulate in the surface layer and contribute to its salinization.

For the inhabitants of our planet, the problem of transforming desert areas into places that will be suitable for human life has always been relevant. This question will also be relevant because over the past few hundred years, not only the population of the planet has increased, but also the amount of area occupied by deserts. And attempts to irrigate dry areas up to this point have not led to tangible results.

This question has long been asked by specialists from the Swiss company Meteo Systems. In 2010, Swiss scientists carefully analyzed all past mistakes and created a powerful structure that causes rain.
Near the city of Al Ain, located in the desert, experts installed 20 ionizers, similar in shape to huge lanterns. In the summer, these installations were systematically launched. 70% of experiments out of a hundred ended successfully. This is an excellent result for a settlement not spoiled by water. Now residents of Al Ain will no longer have to think about moving to more prosperous countries. Fresh water obtained from thunderstorms can be easily purified and then used for household needs. And it costs much less than desalination of salt water.

How do these devices work?

Ions charged with electricity, produced in huge quantities by aggregates, are grouped with dust particles. There are a huge number of dust particles in the desert air. Hot air, heated by hot sands, rises into the atmosphere and delivers ionized masses of dust into the atmosphere. These masses of dust attract water particles and saturate themselves with them. And as a result of this process, dust clouds become rain clouds and return back to the earth in the form of showers and thunderstorms.

Of course, this installation cannot be used in all deserts; air humidity for effective operation must be at least 30%. But this installation may well solve the local problem of water shortage in arid areas.

What is a desert? A desert is a region where only special forms of life can exist. All deserts lack moisture, which means that existing life forms had to adapt to survive without water.

The amount of precipitation determines the volume and types of plant life in the region. Forests grow where there is sufficient rainfall. Grass cover is common where there is less rainfall. Where there is very little precipitation, only certain plant species characteristic of deserts can grow.

Hot deserts near the equator, such as the Sahara in Africa, are located in the subtropical zone, where sinking air becomes warmer and drier. The land in these areas is very dry, despite the proximity of the ocean. The same can be said about the deserts in northwestern Africa and western Australia.

Deserts located far from the equator were formed due to their distance from the oceans and their moist winds and due to the presence of mountains between the desert and the sea. Such mountain ranges trap rain on their seaward slopes, while their reverse slopes remain dry.

This phenomenon is called the “rain barrier” effect. The deserts of Central Asia are located beyond the barrier of the Himalayan mountains and Tibet. The deserts of the Great Basin, in the western United States, are protected from rain by mountain ranges such as the Sierra Nevada.

Deserts vary greatly in appearance. Where there is sufficient sand, winds create sand hills, or dunes. There are sandy deserts. Rocky deserts consist mainly of rocky soil, rocks that form fantastic cliffs and hills, as well as uneven plains. Other deserts, such as those in the southwestern United States, are characterized by barren rocks and arid plains. Winds erode tiny soil particles, and the gravel that remains on the surface is called “desert pavement.”

Most deserts support a variety of plant and animal species. Plants that grow in deserts have virtually no leaves to reduce the evaporation of moisture from the plant. They may be equipped with thorns or thorns to repel animals. Animals living in deserts can go without water for a long time and obtain water from plants or in the form of dew.

Is it always hot in the desert?

We are accustomed to thinking that deserts are always hot. In fact, most of the well-known deserts, such as the Sahara, are located in those areas of the world where the liquid in the thermometer literally begins to boil, and the scorching rays of the sun know no mercy.

However, this does not mean that the desert is necessarily a place where unbearable heat always reigns. Let's try to define what a desert is, and then we will understand why it is so. A desert is a region in which, due to lack of moisture, only special forms of life can exist.

In “hot” deserts everything is clear: it simply rains too rarely, which is quite consistent with our definition. However, imagine a place where all the water is frozen and therefore cannot be absorbed by plants. Such a region also fully satisfies the definition of a desert, only not “hot”, but “cold”.

Do you know that most of the Arctic is a real desert? Annual precipitation (meaning just rain) there is less than 40 percent and most of the water is ice that never melts. However, it can also be cold in “hot” deserts. For example, in the great Gobi Desert, located in Central Asia, there are bitter frosts in winter.

Most of the dry, always hot deserts are located in two zones stretching around the globe north and south of the equator. Due to the constant high atmospheric pressure, precipitation almost never falls there. The existence of other deserts located further from the equator is explained by the fact that they fall within the “rain shadow” region. This term is used to refer to the effect created by mountain ranges that prevent clouds coming from the sea from penetrating into the interior of the continent.

None of the major rivers originate in the desert. However, on their way to the sea, rivers can flow through desert areas. The Nile, for example, flows through the Sahara before reaching the Mediterranean Sea. A significant part of the Colorado River bed in North America also lies in the desert.

The desert is fraught with many secrets and mysteries, sometimes completely unexpected and surprising. Despite the fact that it frightens and repels many with its unfavorable climate, too high temperatures during the day and low nights, lack of normal vegetation and water, there are many completely unique and beautiful phenomena, such as sand dunes reminiscent of the sea, amazingly beautiful oases or fancy shapes of stones.

In addition, only here you can observe dry fogs that arise during a calm or desert storm, the sound of the sun that occurs when stones burst in the sun, and singing sands, the sound of which is reminiscent of the sound of opera singers, with metallic notes.

And only in the desert can you truly appreciate the taste and diversity of water. Only here can people be without an umbrella, while remaining completely dry. And if you think that this is impossible or just another exaggeration, then you should visit the desert and see for yourself that dry rain is completely real.

It turns out that it still rains here, and not as rarely as we previously thought.
However, despite the fact that the formation of rain clouds themselves and the condensation of water vapor over arid areas occurs only at a sufficiently high altitude, and most often the droplets evaporate during flight, sometimes precipitation still falls in deserts, which sometimes falls to the ground in large streams of water . Almost all of the fallen water evaporates very quickly from the surface and only a small part seeps into the earth to great depths, where it is stored.

Dry rain is the most amazing phenomenon of a dry continental climate, with relative and absolute air humidity close to 0. Here you can see how threatening clouds gather overhead and see exactly how it rains high in the sky, but no matter how long you wait for the appearance drops on the dry, exhausted earth, they never appear.

Tourists, having seen such a unique phenomenon as, are amazed by its beauty. The contrast between the dried land, dry dusty air at a height of several meters and the black stormy sky covered with black clouds attracts the eye and evokes admiration and unusual delight from what is seen.

Where does dry rain come from?

It is known that rain falls from clouds that form in the atmosphere at high altitudes and are the result of the evaporation of water from the earth's surface. Large clouds, as a rule, indicate the imminent fall of precipitation on the ground, which can fall to the ground in the form of frost, dew, hail, rain, or a completely unique phenomenon of its kind - dry rain.

Dry rain is characteristic of arid regions of the Earth, with high air temperatures and low humidity levels. So, most often this phenomenon is observed in deserts such as the Sahara, Namib, Kalahari, Gobi and others.

Dry rain is formed in the same way as ordinary rain or other precipitation. From the smallest droplets of moisture, which are contained in the clouds and gather together, forming larger drops, they overcome the force of air currents ascending into the sky and rush to the surface of the Earth under the influence of gravity.

Over dry areas where large amounts of sand are concentrated, tiny dust particles become airborne, which accelerate the condensation process. In the desert, the air temperature is very high, but the relative humidity is very low, so those formed simply evaporate into the air without ever touching the surface of the Earth.

Having once seen the heavenly beauties during a dry rain, and felt disappointment and delight, at the same time, looking at this phenomenon, you can fall in love with the desert forever!

The question is turned upside down. It is not in the desert that it rarely rains and there is a lot of sand, but on the contrary, deserts are formed where it rarely rains and there is a lot of sand. The rains come from the clouds. Clouds bring cyclones. Cyclones form mainly on the coasts of seas and oceans. While the cyclones reach the central regions of the continent, all the water from the clouds in the form of rain spills along the road, so there is little rain in the central regions of the continents. If the soils are not sandy, then the water remains on the surface (absorbed shallowly into the soil), so the existence of vegetation is possible. If there are sandy soils, then water from rare rains easily seeps deep into the sand and there is little water on the surface. Plants don't have enough water and don't grow. Such a place is called a desert.