The temperature in deserts can drop by about 42 ° C at night, reaching -2 ° C, due to this simple reason.
The usual image of the desert is that of sand, camels, and oppressive heat. This is true, but only during the day: deserts are very cold at night.
Temperatures can drop as low as 42 ° C: go from average from 38 ° C in the day to -4 ° C at night. From total heat to absolute cold. But why does this happen?
Explain it POT that the key is in the sand and the humidity.
Sand does not retain heat well, so when the Sun hits the desert, the surface is not totally affected. Sand grains absorb heat, but release it into the air. For its part, the absence of moisture also helps change.
The chain from heat to cold in deserts
The effect is like this: the Sun emits energy and the desert sand receives it and releases it. The atmosphere heats up tremendously. However, at night there is no sunlight to warm the environment, leaving the sand very cold.
Because desert air is extremely dry, heat storage is low. There is no water vapor in the air, therefore there is no such sensation of heat.
The lack of humidity allows arid places to heat up rapidly during the day, but also cool down in the same way at night.
How plants and animals adapt to changing weather
Animals adapt easily to these changes. In the case of reptiles, being cold-blooded, they do not need to invest energy in maintaining a constant body temperature.
In the case of large mammals, like camels, survive thanks to temperature insulation with fat and thick skin.
And the plants? They grow only in areas where the air temperature does not drop below freezing for more than two hours at night. In other areas, they just don’t grow.