The Role of Integrated Air Depression in the Rains of Iraq       form the Period between 26-31 /10/2015 (Historical Geography Study)

Ali Khidher, Salar

	The Role of Integrated Air Depression in the Rains of Iraq form the Period between 26-31 /10/2015 (Historical Geography Study)
Al-Adab Journal
Article 1, Volume 0, Issue 122, 2018, Pages 313-334
Author
Salar Ali Khidher
Abstract
This research deals with the weather synoptic situation that affected Iraq for, approximately, a week from (25) to (31) of October 2015, and caused very heavy rains, which covered large sections of the country, and floods in many areas in Baghdad causing numerous deaths, due to drowning, house collapse or electric shock. From the analysis of the hourly weather maps during these days, it is clear that Iraq was affected by a Sudanese thermal depression coming from the Red Sea side. This depression developed into secondary centers on Iraq and the eastern Mediterranean creating an integrated air depression. Then, the secondary centers of integrated air depression development into two depressions (family of depression). As for the synoptic situation of the upper air, the depression was deep, as it was found in the upper air at the level of pressure (850) and (500) millibars. This means that the wet surface air raised to the upper air layers above 5000 meters; this led to the condensation of wet air in dense clouds that resulted heavy rain. After flowing up heavy rains in Iraq historically from 1887 to 2013, especially in Baghdad city it is clear that about 77.7% of Baghdad (seasonal) rains are less than 200 mm. This indicates that most of the air masses that reach Baghdad have low humidity, due to Iraq continental location. In addition, the possibility of heavy rainfall between (400.1 mm and above) is very little which is about (1.8%) in Baghdad.

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