Dust sources affecting the UAE
This report focuses on dust classification that affects UAE in terms of the sources. This sources either a natural source or sources that result of human and industrial activities. Dust and sand storms which affect the UAE originated from different regions, these regions are classified to regional and local sources. The regional sources include three areas, the first area includes Iraq (central and southern parts), in addition to several border areas between Iraq and neighboring countries, the second area is the border area between Afghanistan, Pakistan and Iran, and the third area is the Nufoodh and Dahna deserts and the Empty Quarter in the Saudi Arabia.While the local source includes industrial and human activities and different natural weather conditions that produces dust and causes raising dust which affect the UAE. Statistics of suspended dust which originated from the regions mentioned above and affected some parts of the UAE, showed that the percentage of such cases is about 60% from Iraq area, 25% from the border region between Afghanistan, Pakistan and Iran, 15% from the Empty Quarter in Saudi Arabia. Satellite images were used to monitor the origin places of the dust, its density and direction of movement in the atmosphere over an area of interest. Synoptic situation that played a role in dust events at various different sources had been clarified. Also, dust cloud thickness which is called (Aerosol Optical Thickness) had been determined, as well as determining the size of dust particles in some cases by using the Angstrom coefficient, through measurements network over the UAE, which is part of global system called the Aerosol Robotic network (AERONET). AERONET is based on satellite property of remote sensing in addition to ground monitoring stations to study aerosols and some of its properties. The impact of the cloud dust on the thermal inversion in the atmospheric boundary layer for two different situations of dust storms had been clarified. It had been focused also on the methods used to monitor and control the dust storms and their predictability. Results of air quality monitoring around the clock at several stations were presented using a network of stations dedicated to monitor air pollutants in order to determine the level air purity guide. Activities that affected by dust had been listed and some ways of reducing the incidence of dust storms from these sources had been displayed.