## Simulations set-up

The simulations start at local noon on 15 July 2006 and last just one time-step. They are located at coordinate 14.0 S and 6.5 E. For further details, see Table 1.

If possible we ask for using the constant greenhouse gases concentrations provided in Table 2 (since the ozone concentration is height dependent, it is contained in the NetCDF file).

All the necessary informations are collected in the NetCDF file radiationtest_input.nc.

### Initial conditions

The initial profiles are based on standard atmosphere characteristics and on observations.

**Boundary Layer**: 0. < z < 600. m

In order to obtain different amounts of liquid water path (LWP), the liquid water equivalent potential temperature, θ_{l}, has been
maintained constant while for the total water content, q_{t}, a value belonging to the following set has been chosen:

θ_{l} = 287.5 K

q_{t} = (8.00; 8.50; 8.57; 8.64;8.71; 8.78; 8.85;
8.92; 8.99; 9.06; 9.40; 9.17; 9.30; 9.43;
9.56; 9.69; 9.82; 9.95) g/kg

The first profile corresponds to the clear sky case while the others correspond to a stratocumulus clouds topped boundary layers with
increasing LWP.

Figure 3: profiles of potential temperature (on the left) and temperature (on the right) in the boundary layer.

Figure 4: profiles of total water content (on the left) and liquid water content (on the right) in the boundary layer

**Free Tropophere**: 600. < z < 16250. m

T = (-6.55946 K/km) z + (302.455 K)

RH = 0.15

**Tropopause**: 16250. < z < 24700. m

T = (3.40457 K/km) z + (138.474 K)

q_{t} = 0. g/kg

**Stratosphere**:

q_{t} = 0. g/kg

- 24700. < z < 30650. m: T = 222.5 K
- z > 30650. m: T = (- 1. K/km) z + (253.32 K)

Figure 5: profiles of potential temperature (on the left) and total water content (on the right) up to the top of the atmosphere.

### Microphysics

_{c}, varies with height as follows:

_{a}is the air density, ρ

_{l}the liquid water density and q

_{l}the liquid water content.

With these assumptions the optical depth, τ , reads as

_{c} = 200. cm-3. Along with the previous assumptions of non-dispersive delta-peaked distribution of the cloud droplet size distribution and no inhomogeneity for the liquid water content, this leads to an effective radius which is height dependent

**SET A**: operational set-up;**SET B**: prescribed effective radius: r_{e}= 9 μm;**SET C**: constant cloud droplet number concentration: N_{c}= 200. cm-3.

### Vertical resolution

- the standard resolution such as used in the operational runs;
- a higher prescribed resolution.

p

_{k+1/2}= A

_{k+1/2}+ B

_{k+1/2}p

_{s}

where p

_{s}is the prescribed surface pressure. The A's and B's are provided in the NetCDF file radiationtest_input.nc.

Radiation codes that run in LES models should run at a vertical resolution of 10 m in the lowest 1 kilometer. Beyond this height the resolution can be made coarser through the use of a stretched grid.