4. Results: dust-free case
4.a. Horizontal mean fields Figure 12a shows the time development of the vertical profile of horizontal mean temperature (left panel) and potential temperature (right panel) of the 6th day from LT = 8:00 every 4 hours. Figure 12a shows regular diurnal change; the amount of atmospheric dust is almost constant and the vertical profile of horizontal mean dust mixing ration does not change significantly (Figure 11b). The depth of the convection layer becomes about one half of that in dust-free case (Figure 3e), since stratosphere temperature increases because of the radiative heating caused by the dust absorption of solar radiation. Figure 12a: The same as Figure 3e but for the 6th day in dusty case. Other results of horizontal mean field Turbulent diffusion coefficient (Figure 12b) Grand and surface temperature (Figure 12c) Atmospheric heating profile (Figure 12d, Figure 12e) Heat budget of atmosphere and surface (Figure 12e)
A numerical simulation of thermal convection in the Martian lower atmosphere.