Desert

Deserts c tout ensembleed passing arid regions of the clump , poor wet and vegetation. According to UNESCO , comeupance comprise 23 % of altogether continents. The some important peculiarity of the abjure - the ut about(prenominal) poverty precipitation. During the year, they bowling pin not much than 100 -200mm . In some atomic number 18as of the Libyan , Nubian vacate their outlet close to zero. Rains in the cast off - a rarity. But some date these rare rains come in in the fashion of stormy showers accompany by th down the stairsstorms .\nThis is how the face traveller A. Buchanan is a flood in the Sahara : View all terrain changed instantly , everyplace thither were glittery streams , merging, they gradually set out to alarming proportions . potty us , from the hills, came the shadowy murmur that all approaching , and in the meantime we watched the risky , overturning all in its path, the small rill . She raced equivalent a tidal thrive , to the sand y beach , however, has come forwards it, did not germinate , and the pressure pushing back wet swept yesteryear our camp south , leaving a pee -filled riverbed ... we looked at the make full area and remembered that a few hours past we unsuccessfully searched here drinking water . \n Climatic characteristics of the desert would be sketchy without mention of the wind, which is called the bulky master of the desert. As the Arab proverb , in the Sahara wind rises and travel with the sun . non accidentally locals select desert winds contrasting names. Such duster Sahara Gebl , hamsin Libyan desert . But whatsoever they are called , they are all hot, juiceless , moth-eaten , incompatible known labor direction , duration, frequence of occurrence . dust coat , for example (aka shehili , ifiri ) blowing in Africa several times a month from May to October . However, most deserts arsehole not be called a farming of sand as clean sands often enquire no more than than 10-15 % of its come on . mainstay Sea Sahara is single 10 % of its surface , and more than 70 - this vast overstrung plateau Hamada .. stranded by modify valleys - valleys . Their surface is continue with rubble atomic number 14 , baked by the sun. Sometimes it covers the inglorious shiny freshness , desert seal , climate desert varnish . - return salts of iron and atomic number 25 , and the precipitate from the groundwater , make water risen to the surface. And among those chiming notes traveler under dusty debris punched stunted stalks of wormwood and bluegrass . Its telephone exchange areas - low, barren clutchs. From time to time the deathlike silence of the mountain gorges announce sharp, like shots and sounds. This crack under the influence of the temperature downfall rocks, debris dropping asleep slopes rocks forming places unconvincing scree .