Variation of Radiative Forcing Over Ahmedabad City

Abstract

In order to understand the effect of pollution on the atmosphere over Ahmedabad city we have extracted two years (2017-18) of satellite and ground data. RF over Ahmedabad is determined by this data. For the satellite data, we used two different Radiative Transfer Model’s (COART & SBDART) while for ground measurement we only used SBDART to estimate RF. COART results for MODIS indicates 6.24% increase RFATM in winter 2018 compared to 2017 that is very similar to SBDART results for MODIS. Ground measurements with SBDART indicates 46.89% increase in RFATM in winter 2018 compared to winter 2017. AOD observations from MODIS are smaller than the ground-based ones and that particularly the change from 2017 to 2018 is much smaller in MODIS than observed at the ground. The study presents comparison of RF using two different model approaches for winter 2017 & 2018. However, the study concludes that anthropogenic activities are resulting to RF.