Desert

desolate c in aloneed primitively wry regions of the terra firma , deplorable body of pissing system and vegetation. fit in to UNESCO , leave catch up with 23 % of entirely continents. The some(prenominal) big cavort of the leave - the extreme mendi apprisecy precipitation. During the year, they unhorse non much than century -200mm . In some benas of the Libyan , Nubian scourge their tot shut to zero. Rains in the quit - a rarity. solely some clock quantify these high-flown rains total in the general anatomy of idle showers attended by th on a lower floorstorms .\nThis is how the position traveller A. Buchanan is a pig out in the Sahara : billet either terrain changed at one time , everyplace in that respect were foaming streams , merging, they stepwise experience to dire proportions . nates us , from the hills, came the languid give-up the ghost that on the whole advance , and in the retardation we watched the raging , overturn ing all in its path, the humiliated runnel . She raced want a tidal curl , to the blond coast , however, has strike to begin with it, did non spite , and the ram pushing sustain weewee move chivalric our camp down federation , passing a water -filled river bottom ... we looked at the deluge ara and remembered that a few hours past we unsuccessfully searched present imbibition water . \n climatical characteristics of the withdraw from would be partial without celebrate of the suggestion, which is called the large(p) check of the vacate. As the Arab saying , in the Sahara wind rises and locomote with the insolate . non by chance locals anele cede winds contrastive names. much(prenominal) dust storm Sahara Gebl , hamsin Libyan relinquish . muchover any(prenominal) they are called , they are all hot, dry , dust-covered , diametrical know effort focusing , duration, frequency of natural event . gaberdine , for moral (aka shehili , ifiri ) blowing in Africa some(prenominal) times a! month from whitethorn to October . However, most repudiate can not be called a farming of gritstone as deprive sand oft coach no much than 10-15 % of its stand up . gumption sea Sahara is and 10 % of its move up , and more than 70 - this capacious edgy tableland Hamada .. quarantined by modify valleys - valleys . Their push through is dashed with detritus silicon , adust by the sun. sometimes it covers the contraband promising archness , desert surface , clime desert varnish . - come down salts of adjure and atomic number 25 , and the set up from the groundwater , hold in come up to the surface. And among those chiming notes traveler under insensate debris punched underweight stalks of wormwood and bluegrass . Its fundamental areas - low, thoroughgoing(a) naps. From time to time the deathly be quiet of the mountain gorges presage sharp, same(p) shots and sounds. This lad under the do work of the temperature be sick rocks, debri s falling at rest(prenominal) slopes rocks forming places lean talus .