Earth and Moon

Deserts and arid areas

Deserts and arid areas

One of the most breathtaking and impressive landscapes of the world geography are the deserts, places full of myths about naive, elves and imps turned into stone.

They are strange territories that seem typical of another world that attracts and scares us equally.

From here we will analyze them discovering their characteristics, their possible origin and also their own structures and elements. It promises to be an extremely interesting trip, do you sign up?

It is often confusing desert with Arid zone When they really are not the same. An arid region is one whose rainfall is scarce, as well as its vegetation, reduced to small isolated bushes between which bare and dry soil emerges. So much so that the polar regions like the one we see in the image, for example, are not considered arid areas because although the vegetation is very scarce, the soil is not dry due to precipitation in the form of snow.

Even so, many specialists talk about cold deserts or polar because they use thermal factors to make subdivisions and thus distinguish hot deserts (for example, the Sahara), temperate (like the moors of the Aral Sea) and cold (it would be Iceland, among others).

The arid and semi-arid regions occupy approximately one third of the surface of our planet.

In the deserts, rainfall is very scarce and vegetation is usually concentrated at specific points called oasis, as perceived in the image. They usually indicate the existence of water at a certain depth. Not all deserts are sandy, there are also stony deserts.

In this chapter:

Aridity on planet Earth: More than 600 million human beings live in arid areas, characterized by their poverty and desertification ... Read pageDeertization and desertification: Both desertification and desertification cause the gradual loss of coverage ... Read pageHow Does it form a desert ?: There are atmospheric conditions and climatic regimes that naturally leave behind lands… Read page Deserts created by man: Scientists estimate that 12 million hectares are lost every year due to… Read page Erosion in Spain: Agree with UNESCO (Nairobi, 1977), Spain is the only European country with a high risk of desertification… Read page Arid zone modeling: The arid areas of the world range between 0º and 60º north latitude and between 0º and 55º de… Read page