A Preliminary Study on the Heterogeneous Chemical Processes on the Surface of Dust Aerosol and Its Effect on Climate

Abstract

AbstractIn this paper, we set up a heterogeneous chemical model which includes dust emission and connected it to an advanced meso‐scale meteorological—atmospheric chemical model system. A lot of cases were simulated by this model system to study the heterogeneous chemical process of dust aerosol and its climate effect. The results show that the heterogeneous reaction will reduce the concentration of SO2 and O3 but increase sulfate concentration. In some areas, it can decrease the NO2 concentration, but it can also increase it in other areas. The change of annual average sulfate is 2.6mg/m2. The maximum values of radiative forcing caused by heterogeneous reaction are −0.24,−1.0,−2.0,−0.6W/m2 respectively in January, April, July, and October. The annual average radiative forcing is −0.033W/m2. The maximum temperature variation in January, April, July, October are −0.16,−0.35,−0.5,−0.48K respectively and the annual temperature variation in whole domain is –0.021K. The heterogeneous process also has evident effect on precipitation.