Sand-dust storm in northwest Iran

Dust storm is a common atmospheric phenomenon in arid and semi-arid. In this study the effective conditions on a dust storm occurrence in the North West of Iran is survived using a combined method of synoptic/remote sensing. To specify the time of dust storm occurrence we survey the ground measurement data in the study area. Then atmospheric reanalysis data were obtained from the NOAA website. Synoptic conditions are survived with mapping this data in GRADS software. Dust phenomenon detected using MODIS/AIRS images in the process of overlay land surface reflectance and dust score. The results show that th existing of high pressure gradient force in the northwest of Iran with promoting effect of mid troposphere waves (500 hpa) and jet stream activity in high troposphere (300 hpa) route the streams with high speed from the Iraq and Syria to the northwest of Iran. The remote sensing images Corroborates the route of dust Coincident with wind stream direction.