Sahara is the world’s largest hot desert and third largest desert after Antarctica and Arctic. Its area is comparable to the area of 9,200,000 square kilometers (3,600,000 square miles] to China and The United States. The name ‘Sahara’ is derived from the Dictionary of the Arabic word “desert”.Sahara includes large parts of Algeria, Chad, Egypt, Libya, Mali, Mauritania, Niger, Western Sahara, Sudan and Tunisia. It includes 9 million square kilometers (3,500,000 square miles), which is 31% of Africa. If all areas with average annual rainfall of less than 250 mm were included, then Sahara would be 11 million square kilometers (4,200,000 square miles). This is one of the three distinct geographical provinces of African vast physics division.
On the map, it connects Algeria’s Mediterranean coast on the remote Atlantic coast of Algeria. Anyway, the Trans-Sahara Highway is often worn in the sand track of sand by half-buried tires with black tires.
According to Frank White and geographer Robert Capit-Ray’s vegetable norms, the northern boundary of Sahara corresponds to the northern border of palm farming and the southern border of Esporto’s border, which is grass like the Mediterranean climate part of the grass. Magreb and Iberia The northern boundary also corresponds to 100 mm (3.9 inches) isohyet of annual rainfall.
In the south, Sahara is surrounded by Sahel, which is a belt of dry tropical savanna, with the summer rainy season extending across Africa from east to west. The southern border of Sahara’s southern border is indicated by vegetation from the southern border of Cornuloda Monakantha (dry-tolerant member of Chenopodiasi), or the southern boundary of the specific grass of Sahel, on the northern boundary of the Sancrais Biflorus.
Sahara is the world’s largest low latitudes hot desert. This area is located in horse latitude under the sub-tropical ridge, an important belt of semi-permanent sub-tropical hot-core high pressure, where the air from the upper level of the tropics drowns towards the ground. This stationary descending air flow causes a warming and drying in the upper tropics. The submerged air prevents evaporation water from growing and hence, prevents adiabatic cooling, making cloud formation almost impossible.
The primary source of rain in the Sahara is the intertropical convergence zone, which is the continuous belt of low-pressure systems near the equator, which brings short, short and irregular rainy season to the Sahel and Southern Sahara. In this vast desert, rain has to overcome physical and atmospheric obstacles, which generally prevent the production of rain. The harsh climate of Sahara is as follows: extremely low, incredible, excessive irregular rainfall; Very high sunshine period value; Annual high temperature; Negative rate of relative humidity; An important daily temperature difference; And a very high level of potential evaporation that is the highest recorded worldwide.
The sky is usually clear in the desert and in the Sahara the period of sunshine is very much everywhere. In the most desert, the annual bright sunshine has more than 3,600 h or more than 82%, and in the eastern part, there is more than 91% or more of the experience in a wide area more than 4,000 h per day in bright sunshine. The highest values are very close to theoretical maximum value. 4,300 h or 98% of the time will be recorded in Upper Egypt (Aswan, Luxor) and the Nubian Desert (Wadi Halfa). Annual average direct solar radiation is approximately 2,800 kW / m (m2) in the Great Desert. There is a great possibility of Sahara for solar energy production.
The temperature of sand and ground are also extreme. During the day, the temperature of the sand is very high because it can easily reach 80 degrees Celsius or 176 degrees Fahrenheit. In Port Sudan, the sand temperature of 83.5 degrees Celsius (182.3 degrees Fahrenheit) has been recorded. In Adrar, Mauritania, the ground temperature of 72 degree Celsius or 161.6 degrees Fahrenheit has been recorded, and the value of 75 degree Celsius (167 degrees Fahrenheit) in North Chad’s Boracou has been measured.
The average annual rainfall is almost not present in the northern and southern parts of the desert at least in the central and eastern part. Due to the advent of a low-pressure system on the Mediterranean Sea with polar front of the desert, more winter clouds and rains occur, although the rainfall of the mountains becomes very weak with shade effect and the annual average rainfall is 100 millimeters ( 4 inches) to 250 millimeters (10 in.) For example, Biscara, Algeria and Ouarzazate, Morocco are found in this area. Due to the arrival of the intertropical convergence region from south to the southern fringes of the desert along with the Sahel, summer receives summer clouds and rainfall, and the annual average rainfall ranges from 100 millimeters (4 in) to 250 millimeters (10 in).
For example, Timbuku, Mali, and Agadez, Niger are found in this area. Rainfall in Sahara is very unreliable and irregular as it can vary considerably year after year. Unlike the negligible annual rainfall, the annual rate of potential evaporation is exceptionally high, which is more than 2,500 millimeters (100 in) to 6,000 millimeters (240 inches) per year in the entire desert. The air on the earth is not dry and vaporized anywhere in the Sahara region. However, at least two examples have been recorded in Sahara, in February 1979 and December 2016, in the city of Ann Safra
Once Overlander is a well-worn road for tourists, 4,500 kilometers (2,800 miles) of the highway is a preferred route for travelers moving north in the hope of better life – and more recently, thousands of people from Algeria Being expelled in the south. They reach temperatures in the summer of 48 degrees Celsius (118 degrees Fahrenheit).
In Niger, a mapping of large scale mapping is associated with 450 kilometers (280 miles), connecting Agades to the Northern boundary agreement of Assam.
Strict desert conditions and increasing insecurity have provided construction and maintenance near impossible.
Naked Tenerae are able to use the dead bodies of abandoned deserted vehicles, the most beloved whispered wild trees, barrels of wild water, and stand-mounted truck tires as distance markers.
Signs of life
Yet there are signs of life: A gas pump outside the Arlit, a power line to power nearby uranium mines, a herb and ubiquitous camel, which emerges to be the most scared.
Long way home
A Nigerian army pick-up runs south of Sahara’s Nigerian Tenerife desert area.