Dust storm, which has a significant impact on regional air quality, is one of the most hazardous meteorological phenomena in the arid areas. Yazd province is one of the arid areas in Iran that is exposed to dust storms. In this study, two cases of dust storms of Yazd province are studied with the use of coupling numerical models and aerosol optical depth (AOD) from MODIS data. We investigated synoptic condition of such dust storms that were formed downstream of upper level through in the area by focusing on two storms, on May 24 and 25, 2014. For this purpose, a dynamic coupling of this case is done using WRF output the HYSPLIT model. This model was implemented to investigate the sources of the dust storms by calculating the back trajectories from the receptor sites. The trajectories indicated that the first and the second case storms occurred in the northeast and the south of Yazd respectively. These results also showed a good agreement with MODIS aerosol optical depth data and HYSPLIT back trajectories paths.

沙尘暴对干旱地区的空气质量具有重大影响，是干旱地区最危险的气象现象之一。亚兹德省是伊朗遭受沙尘暴袭击的干旱地区之一。在这项研究中，使用耦合数值模型和来自MODIS数据的气溶胶光学深度（AOD），对亚兹德省的两次沙尘暴案例进行了研究。我们以2014年5月24日至25日为重点，研究了两次风暴，研究了该区域上层下游形成的此类沙尘暴的天气状况。为此，使用WRF输出HYSPLIT对这种情况进行动态耦合模型。该模型用于通过计算来自受体位点的后向轨迹来调查沙尘暴的来源。轨迹表明，第一次和第二次风暴分别发生在亚兹德的东北和南部。这些结果还表明与MODIS气溶胶光学深度数据和HYSPLIT背向轨迹路径具有良好的一致性。