Shortwave radiative forcing by mineral dust aerosols over Arabian Sea: A model study

A dust aerosol model was developed and its performance validated against pr e-INDOEX measurements. This model was incorporated in the NCMRWF T80 global model. A five-day integration was performed with the assumption that light mineral dust is present over Arabian Sea. Mean shortwave dust forcings wer e computed from the forecast. In general, at surface, a negative dust forci ng was noted. At the top of the atmosphere negative shortwave dust forcing was seen mainly over Arabian Sea, where surface albedo is small, in the cle ar sky conditions.