Retrieving MODIS AOD and Evaluation of Ground-level PM_2.5 in Addition to the Identification of Potential Source Regions Over South India

In this paper retrieving Aerosol Optical Depth (AOD) from Moderate Resolution Imaging Spectroradiometer (MODIS),was used to estimate the ground-level PM_2.5 in the south Indian region, the AOD and other meteorological parameters are also considered, with various grid sizes helpful to find more accurate data prediction of PM_2.5 levels. The multiple regression methods are implemented in this article, the study has shown good agreement in the prediction of PM_2.5 at the Zoopark location, all other locations are in the moderate range. PM_2.5 particle's Source identification was done based on Potential Source Contribution Function (PSCF), Concentration-Weighted Trajectory (CWT), and Cluster analysis archive the receptor dominating source regions. The Central India and East Indian regions are more dominating source regions at receptor locations in the winter season. The predominant sources are local sources at the receptor location.The cluster analysis has shown the intensity of combined trajectories towards receptor location. Winter season cluster III was dominating among the all seasons at receptor location.