A preliminary study on the heterogeneous chemical processes on the dust surface and their effect on climate
沙尘表面非均相化学过程的气候效应的初步模拟研究

We set up a heterogeneous chemical model which includes dust emission and connects an advanced meso scale meteorological atmospheric chemical model system. A lot of cases are 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 concentrations of SO 2 and O 3, but increase sulfate concentration. In some areas, it can decrease the NO 2 concentration, but it can also increase it in other areas. The change of annual average sulfate is 2 6mg/m 2. The maximum values of radiative forcing caused by heterogeneous reaction are -0.24 , -1.0 , -2.0 ,and -0.6 W/m 2 in January, April, July and October, respectively. The annual average radiative forcing is -0.033 W/m 2. The maximum temperature variation in January, April, July and October are -0.16 , -0.35 , -0.5 , -0.48K , respectively and have the annual temperature variation in the whole domain is -0.021K . The heterogeneous processes also have evident effect on precipitation.