The Sahara Desert is probably the most famous in the world. It is a desert region that receives less than 25 cm of rain each year and has little to no vegetation. Deserts are considered very useful natural laboratories for studying the interactions of wind and water on the planet's arid surfaces. They contain valuable mineral deposits that have formed in the arid environment and have been exposed by the continuous erosion of wind and rain.
In this article we are going to tell you all the characteristics, origin, climate, temperatures, flora and fauna of the Sahara desert.
Key features
This is one of the most important deserts in the world and is located in the western part of the African continent. It consists of a vast expanse of arid land stretching from the Atlantic Ocean to the Red Sea. It is bordered by the Atlantic Ocean to the west and the Atlas Mountains and the Mediterranean Sea to the north. The origins of this desert date back millions of years. This entire region was once covered by lush savannas and grasslands interspersed with forests. It was home to numerous hunters and gatherers who lived off the animals and plants they found there. At that time, this area was known as the Green Sahara. Furthermore, if you would like to learn more about the characteristics of other deserts, you can consult the article on the deserts of the world.
The desert originated because rainfall has not been sufficient to maintain a balance between evaporation caused by the sun's rays and plant transpiration, along with precipitation. Therefore, following a cyclical phenomenon in which dry seasons have accumulated, the lack of humidity has led to increased sunlight exposure.
This desert began forming approximately 7 million years ago. The Tethys Sea was located in this area, and its remnants gradually dried up. Trade began to develop across this desert using oxen and carts. As mentioned earlier, in the early days, it was a lush green forest with savannas and teeming with wildlife. The formation of the world's largest desert was a slow and gradual process, taking approximately 6.000 years and concluding 2.700 years ago.
It's important to keep in mind that with the desertification process threatening most of the planet's soils, these deserts could form in the long term. A large part of Spain's territory is threatened by desertification. Some areas could become desert or semi-desert. For more information on this topic, you can read about the risk of desertification in Spain.
Climate and temperature of the Sahara desert
Some of the most unique characteristics of this desert are that it is considered the largest desert in the world. It is also considered one of the driest and has some of the most extreme temperatures. Very few animals and plants live in these places because there is neither the life nor the necessary nutrients to sustain them. The Tuareg and Berber tribes inhabit these deserts . We know that the soils in these areas are very low in organic matter, so agriculture is not an option. The main composition of the soil is gravel, sand, and dunes. Sustainable life adapted to these environments cannot thrive in this type of soil. Given the extreme temperature changes between day and night, almost no type of crop can survive.
The Sahara Desert's climate is characterized by sunny days and cool nights. Rainfall is very rare and, when it occurs, it is torrential. The ocean's influence in this part of Africa produces higher relative humidity in the atmosphere, so fog is frequent along the desert coasts. If you'd like to learn more about the climate, we invite you to read about the desert climate.
Regarding temperature, the climate becomes hotter and extremely dry in summer, resulting in impressive temperatures and a significant difference between daytime and nighttime temperatures. The maximum temperature during the day can reach around 46 degrees Celsius. On the other hand, nighttime temperatures can drop to as low as 18 degrees Celsius . As you can see, this is an extremely extreme temperature range. The maritime influence is very noticeable, so the average maximum temperature is 26 degrees Celsius along the coast, while inland temperatures hover around 37 degrees Celsius.
Flora and fauna of the Sahara desert
We know that during the day in this desert, the heat and sun's rays are extreme and beat down intensely on the earth. Temperatures are influenced by both sunlight and humidity. There are no water sources and rain is infrequent, so the heat and humidity are extreme . However, at night, the temperature drops considerably; some days it can even be cold. The skies are clear, so the heat from the day barely escapes. It's also worth noting that, with clear skies, you can see a spectacular display of stars.
The flora and fauna of the Sahara Desert are very sparse due to the extreme conditions. Some animals, such as camels and goats, which are resistant to these environmental conditions, can be found. One of the animals that has adapted very well to these environments is the yellow scorpion . It is a rather venomous creature that prays for days not to encounter you along the way. Some species of fox, white antelope, Dorcas gazelle, and other species are able to survive in this environment. They have undergone numerous adaptation processes over thousands of years. It is common to find some vipers in the desert, the African wild dog, some crocodiles, and the African silverbilled songbird.
As for the flora, vegetation is very scarce due to the lack of water. There is practically no vegetation of any kind. The few plants that do exist have adapted to the environment and, therefore, seek to reduce the rate of evaporation and increase water absorption. This is why the few plants that do exist have very small leaves and tissues and very long roots. In this way, they accumulate water, and their tissues and leaves are coated in wax. Examples include plants such as the roses of Jericho, the Cystanche, the zilla, and the Sodom apple tree. If you are interested in learning how plants survive in conditions like these, you can visit the article on how plants survive in the desert.
I hope that with this information you can learn more about the Sahara desert and its characteristics.