This happens because, in deserts, the very low humidity of the air means that it does not retain the heat that falls during the day. With little water vapor in the atmosphere, there is almost no formation of clouds, which help to avoid temperature fluctuations. “The clouds act as a kind of greenhouse, which retains the heat absorbed by the earth’s surface, avoiding large losses during the night”, says agronomist Miguel Ângelo Maniero, from the Federal University of São Carlos (UFSCar), campus of Araras (SP). ). Without this “blanket” of clouds, the heat dissipates when night falls. “Furthermore, the dry soil of the desert, due to the lack of water, quickly loses heat to the atmosphere”, says agronomist engineer Luiz Carlos Ferreira da Silva, from UFSCar. This is why, on the same day, the temperature can vary from a torrid 50°C during the day to minus 10°C at night!
Bedouins have “super-technological” clothing to face the ups and downs of the deserts
Of cracking the coconut
On the face, the fabrics protect against the wind and the inclement sandstorms, which can reach 100 km/h. The showy turbans, in addition to representing a sign of age, protect the crown against sunstroke.
A puff and it doesn’t hurt
The clothes are made from camel wool, whose main advantage is the wide weave, which allows the wind to cross it and refresh the skin. At the same time, as it covers the entire body, the costume ends up protecting the Bedouins against sunburns of up to 50°C
portable fan
Another master trick of Bedouin gowns is the fact that they are quite large. This causes the air to circulate inside them: the warm, lighter breath rises, while the cold air enters from below. That is, the sun can be frying outside that the internal “fan” guarantees refreshment
night sauna
Dark wool – navy blue or black – works as a kind of greenhouse, absorbing solar radiation during the day. When it gets dark, and the temperature can plummet to an absurd minus 10°C, the tissue slowly donates its heat to the body, keeping it warm
Nomadic peoples, the Bedouins have portable huts, which also give a design show
fiber people
The great architectural secret of the Bedouins is the material they use to make the huts: goat hair fibers. In addition to making the tent lighter to be taken from here to there, in case of rain, the waterproof fibers expand, preventing water from penetrating the tent.
Happy night
Because they are dark, the fibers absorb a lot of heat during the day. At night, when the outside temperature can reach minus 10°C, they slowly release heat, ensuring internal coziness. Even so, to help keep it warm, a fire is usually lit inside.
Air conditioning
To protect against strong winds and sandstorms, the tents are fixed to sturdy wooden stakes in the ground. But, as the weave of the fiber is hollow, the heated air, which is lighter, rises, while the cooler air enters underneath, causing a refreshing circulation inside.