EGU General Assembly 2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

Contribution of meteorological factors to AOD variability during the dusty season over Iran

Robabeh Yousefi1,2, Fang Wang1, Quansheng Ge1, and Abdallah Shaheen3,4
Robabeh Yousefi et al.
  • 1Key Laboratory of Land Surface Pattern and Simulation, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing100101, China (
  • 2College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China
  • 3Center for Monsoon System Research, Institute of Atmospheric physics, Chinese Academy of Sciences, Beijing
  • 4College of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing, China

Atmospheric aerosols considered as one of the main concerns in the ongoing climate change. Meteorological changes have a significant role in the inter-decadal Aerosols variation. In this talk, long term (2000-2019) aerosol optical depth (AOD) and metrological factors data from the reanalysis-based Modern Era Retrospective Analysis for Research and Applications (MERRA-2) were used provide deep insight into the relationship between meteorological factors and AOD variability over Iran during the dusty season (MJJA: May, June, July, and August). Prior to regression analyses, Iran was divided into three parts based on the climatological conditions (west part: dusty area, north part: wetter, and center: dry area). Using a multiple linear regression model, AOD variability over Iran was significantly linked to sea level pressure and soil moisture. Winter surface temperatures and relative humidity are the main contributors to MJJA AOD variability over the western and northern parts.  AOD was not affected by precipitation. Our results suggested that climatic variations strongly affect the dust cycle, with a strong dependence on wintertime conditions in the region.

How to cite: Yousefi, R., Wang, F., Ge, Q., and Shaheen, A.: Contribution of meteorological factors to AOD variability during the dusty season over Iran, EGU General Assembly 2021, online, 19–30 Apr 2021, EGU21-1349,, 2021.


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