3. Result: dust-free case   a. Horizontal mean fields
3.a.i. Turbulent diffusion coefficient Figure 3b: Diurnal change of the vertical profile of horizontal mean turbulent diffusion coefficient of the dust-free case below the height of 1 km. Profiles are for every 2 hours from LT = 8:00 to 18:00 of the sixth day. Number on each line indicates local time. Figure 3b shows the time development of horizontal mean turbulent diffusion coefficient below 1 km height. Below the height of 150 m, the horizontal mean turbulent diffusion coefficient decreases toward the ground surface. During the time from LT = 12:00 to 14:00 when the activity of thermal convection is the largest, the value of horizontal mean turbulent diffusion coefficient is roughly about 20 m2sec-1 except near the surface.
A numerical simulation of thermal convection in the Martian lower atmosphere.