  This paper investigates the possibility of high resolution mapping of PM2.5
concentration over Tehran city using high resolution satellite AOD (MAIAC)
retrievals. For this purpose, a framework including three main stages, data
preprocessing; regression modeling; and model deployment was proposed. The
output of the framework was a machine learning model trained to predict PM2.5
from MAIAC AOD retrievals and meteorological data. The results of model testing
revealed the efficiency and capability of the developed framework for high
resolution mapping of PM2.5, which was not realized in former investigations
performed over the city. Thus, this study, for the first time, realized daily,
1 km resolution mapping of PM2.5 in Tehran with R2 around 0.74 and RMSE better
than 9.0 mg/m3.
  Keywords: MAIAC; MODIS; AOD; Machine learning; Deep learning; PM2.5;
Regression
