International Polarized Radiative Transfer

Setup:

• typical water soluble aerosol for 50% relative humidity at 500 nm from OPAC database
• aerosol optical thickness: 0.2
• aerosol 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 expansion moments over generalized spherical functions for the phase matrix have been provided by S. Korkin and are available here.

• no molecules
• surface albedo: 0
• transmittance at bottom and reflectance at top of layer
• solar zenith angle sza: 40°
• solar azimuth angle saa: 0°
• viewing zenith angles
  • at bottom: vza: 0° - 80°, 5° increment
  • at top: vza: 100° - 180°, 5° increment
• viewing azimuth angle vaa: 0° - 180°, 5° increment

Output format:

• The output should be provided in the same format as for case A1 (Rayleigh scattering).

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

Data of all models (MYSTIC and 3DMCPOL include also standard deviation):
MYSTIC
3DMCPOL
IPOL
SPARTA
SHDOM
PSTAR