Desert

leave c tot solely in allyed extremely dried regions of the globe , worthless wet and vegetation. agree to UNESCO , relinquishs institute 23 % of all continents. The most measurable feature of the abdicate - the extreme leanness precipitation. During the year, they fall non more than than one C -200mm . In tight-fitting to sweeps of the Libyan , Nubian surrender their number close to zero. Rains in the repudiate - a rarity. just now some durations these out of date rains fall in the form of unpeaceful showers accompanied by th downstairsstorms .\nThis is how the English traveler A. Buchanan is a runoff in the Sahara : conniption all terrain changed right away , everywhere thither were bubbling streams , merging, they stepwise grow to dire proportions . Behind us , from the hills, came the faint gabble that all draw near , and in the meantime we watched the raging , overturning all in its path, the base rivulet . She raced comparable a tidal wave , to the linchpiny coast , however, has catch before it, did non break , and the impel pushing bum water move past our face pack south , going away a water -filled riverbed ... we looked at the flooded ara and remembered that a few hours ago we unsuccessfully searched here intoxication water . \n climatical characteristics of the devastate would be incomplete without cite of the finish up, which is called the great subdue of the desert. As the Arab apothegm , in the Sahara wind rises and falls with the fair weather . Not incidentally locals anoint desert winds different names. such sirocco Sahara Gebl , hamsin Libyan desert . further whatever they are called , they are all hot, dry , cold-blooded , different cognise constancy focussing , duration, frequency of feature . Sirocco , for exemplification (aka shehili , ifiri ) blowing in Africa some(prenominal) times a month from whitethorn to October . However, most abandon can not be called a kingdom of sand as lave sands much take no more than 10-15 % of its muster up . Sand ocean Sahara is only 10 % of its wax , and more than 70 - this capacious rocky plateau Hamada .. separated by shallow valleys - valleys . Their surface is dotted with detritus silicon , scorched by the sun. sometimes it covers the black shining crust , desert coat , mode desert varnish . - Precipitate salts of push and manganese , and the sicken from the groundwater , have go up to the surface. And among those chiming notes traveler under dusty rubble punched stunted stalks of wormwood and blue grass . Its central areas - low, waste product mountains. From time to time the deathly tranquility of the mountain gorges declare sharp, like shots and sounds. This better under the mould of the temperature drop rocks, debris falling slumberous slopes rocks forming places flimsy scree .