Modeling study of a severe aerosol pollution event in December 2013 over Shanghai China: An application of chemical data assimilation

- We performed a modeling study on 9-day severe PM2.5 pollution event in Shanghai on December 2013.
- 3D-variational GSI approach was used to assimilate PM2.5 to improve initial conditions.
- The improvement in the forecasts with data assimilation was clearly noted.
- Data assimilation improved aerosol forecasts for most of the stations in East China.