‘Sahara’ which means ‘desert’ in Arabic is one of the mystery land known in the world. It is considered that it has changed many things if we go into the history.
Where is it located?
Everyone must be aware of the largest desert that is Sahara desert. It is considered to be situated and covering mostly the African continent that is about the third northern part of its ranging about 3.5 million square in miles.
Sahara desert is moreover extended from the Atlantic Ocean to the Nile River and red sea that is about 3000 miles, and if bending towards the Mediterranean shore and Moroccan Atlas Mountains, it is around 1000 miles claiming Savannah and is known as Sahen. This desert if compared is 16 times larger than the France size. Sahara desert covers almost all the part of Tunisia, Western Sahara, a Mauritania, Libya, Algeria, Egypt and Nigeria, northern part, Mali Sudan and also the areas of Sudan. Isn’t it amazing!
If heading towards features that are topographical in nature, not only include the field of sand dunes that are ionic, mountains called as arid mountains called as arid mountains plains that are shingled, having basins that are very shallow and also the deserts that have a deep large oasis. Chad’s Mount kessi that is considered to be the highest peak and the fact behind is that it is an extinct volcanic that is somewhat situated at a peak of height of 11,204 feet at above the level of sea and the depression known as Egypt Qattara depression whose is located 430 feet below the sea level and that to on its deepest point.
The Sahara desert comes only 15% of the total desert surface, and it lies in the north central region of Libya and Algeria. Sand dunes have a back slope means windward or a surface or a leeward surface. Winds prevail the sand up to the back slope and then reaches to a crest after gravity pull, it collapses towards the surface.
The dunes having horns snuggle the slip face and points downwind. For an enlarged period, these dunes flow in the same direction forming the under winds.Linear dunes form under winds at any of the two directions, and it is in a very straight or somewhere in curling form.The circular shaped mound known as Dome dunes doesn’t have back slope, or we can say slip face. Rare of the rarest they tend towards and from the edges of upwind in the field of dunes.
It has two permanent rivers, the Nile and Niger Rivers. Nile River is in central Africa flowing northward, waving through Sudan and falls into the Mediterranean. On the other Niger is in western Africa flowing southwest towards Sahara the northeastwards to Mali and then turning a bit southeastwards to Nigeria and falls into the Gulf of Guinea. Sahara also has underground reservoirs. It has Lake Chad that lies in the country which has an expanding lake of water situated at the southernmost edge of the Sahara. The desert also lies below the drainages known as ‘wadies’ which arouses in the mountains and empties into the desert floor. Sahara also has aquifers which discharge the water at oases, and that can be seen the depression of the surfaces.
Most severe climates of the world are in Sahara also. The Sahara desert receives limited or no rainfall and high-velocity winds with varied temperature ranges. The overall rainfall is very less in most of the desert. It has also happened that for many years the desert has not received any rain, and sometimes it rained heavily.
The winds which throughout the year blow towards equator from northeast gives aridness to the desert. The southwest wave of this wind gets warmer and helps in rainfall. Due to change in temperature of the winds, there is whirlpool which carries sand and dust particles up in the sky thereby creating sand storms moving towards the south.
Sometimes in the summer temperature rises till 100 degrees Fahrenheit and the highest recorded till date is 136 degrees. Similarly the variation of temperature from morning to evening my rise and fall up to 40 degrees.