3-DIMENSIONAL SIMULATIONS OF THE ATMOSPHERIC CYCLE OF DESERT DUST PARTICLES USING A GENERAL-CIRCULATION MODEL

We present a detailed description of the modeling and of the results obtained from simulations of the present-day climate (February and August) performed to test the dust model. The modeling considers particles as passive scalars, in the 1-μm range, and includes transport from all the desert areas. The simulated results exhibit a strong seasonal cycle, with twice more dust in August than in February, resulting from more dust uplifting in the troposphere over the Sahara and Arabia-Asia in the summer. Compared to the available observations, the simulated results are fairly reasonable. -from Author