* That the broad reach of the Arab world lead to the rule of desert conditions and characterized by heavy heavy upward Adtarabah in a very short period of time, and remain throughout the year without rain.
** Can say that 80% of the area of the Arab world dominated by desert conditions.
** Terrain helped in the formation of deserts in the Arab world, where we find that the mountain ranges bordering the east coast of the Mediterranean Sea to prevent the arrival of wind wetlands to the inside, which led to be visible Sham in the Arab Mashreq and the extension of the Atlas Mountains in Morocco Arab to intercept the winds wet coming from the north and the northwest extended Vtkont deserts of eastern Morocco to Tunisia through Algerian deserts.
* The areas the rain more than 1000 mm are very limited areas in the Arab world and is in the high mountain peaks such as the Rif Mountains in Morocco and the mountains of the hill in Algeria and western mountains of Lebanon and the regions of Bahr el Ghazal and Bahr al-Jabal in the Sudan.
* The areas where they fall amount of rainfall exceeds 500 mm per year is in the northern Atlas Mountains stretch on the territory of Morocco, Algeria, Tunisia, and the eastern mountain range to the east coast of the Mediterranean Sea, as in Syria, Lebanon, Jordan and Yemen.
* The areas where more than 200 mm rain per year, they include a valuable range extends from Mauritania to Sudan and western Yemen and southwest Saudi Arabia and Green Mountain in Oman and central Somalia
** Drought prevails in most of the Arab world, where there are some areas where they recorded Rain amounts ranging between 100-200 mm annually, is considered transitional areas around the desert where no more than 50 mm rainfall annually.
** And divided the rainfall in the Arab world into four sections.
التسميات
climate