Case B4: Standard atmosphere with cloud layer and underlying ocean surface
This test case includes a standard atmosphere with Rayleigh scattering (as case B1). A cloud layer and an ocean surface is added.
Setup:
model atmosphere with 30 layers, scattering optical thicknesses provided in tau_rayleigh_800.dat, no molecular absorption
wavelength: 800 nm
Rayleigh depolarization factor: 0.03
Ocean reflectance matrix by Mishchenko's code ocean.shadow.f (uses anti-clockwise convention for azimuth angle!)
refractive index of water (1.33 + 0i)
wind speed 2m/s
cloud layer between 2 and 3 km, optical thickness of 5
effective radius: 10 <m>mu m</m>
cloud optical properties: netCDF,ascii
The variable “phase” includes the phase matrix, as a function of the scattering angle (variable “theta”). The 4×4 scattering phase matrix for spherical droplets has four non-zero elements, which are stored in the following order: $ P = \begin{pmatrix} P1 & P2 & 0 & 0 \\ P2 & P1 & 0 & 0 \\ 0 & 0 & P3 & P4 \\ 0 & 0 & -P4 & P3 \end{pmatrix} $
The corresponding Legendre polynomials (“pmom”) and the single scattering albedo (“ssa”) are also included in the file.
The output should be provided in the same format as for case A1 (Rayleigh scattering).
Results
Difference plots between the models IPOL, 3DMCPOL, SPARTA (previously named TROPOS), SHDOM, PSTAR and MYSTIC for the full radiation field: 3DMCPOL IPOL SPARTA SHDOM PSTAR