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intercomparisons:e2_absorption

Case E2: Rayleigh scattering and absorption, US standard atmosphere

In this case we include the US standard atmosphere, the corresponding Rayleigh scattering optical thickness and molecular absorption profiles are provided at 320nm.

Setup:

  • model atmosphere US-standard, scattering optical thickness provided in file tau_rayleigh_320nm_usstd.dat, molecular absorption optical thicknes in tau_absorption_320nm_usstd.dat. The file includes 2 columns where the first is the altitude of the layer boundaries in km, and the second is the layer optical thickness (e.g. the value for 0 km corresponds to the optical thickness for the layer from 0 to 1 km).
  • wavelength: 320 nm
  • molecular scattering and absorption
  • Rayleigh depolarization factor: 0.03
  • surface albedo: 0
  • Earth radius: 6371 km
  • E2_1: Polarized zenith radiance as a function of sun position
  • solar zenith angle: sza: 80°-100° (90° corresponds to horizontal direction)
  • solar azimuth angle: saa: 65°
  • viewing zenith angle: 5°
  • viewing azimuth angle: 0°
  • E2_2: Limb radiance at top of atmosphere for tangent heights between 0 and 90 km
    • viewing zenith angle at TOA: vza: corresponding to tangent heights 0-90km, 2km increment
    • viewing azimuth angle at TOA: vaa: 0°
    • solar zenith angles: sza: 60°
    • solar azimuth angles: saa: 0°, 90°

Output format:

Please include your data in the netcdf file IPRT_phase3_MODELNAME.nc.

intercomparisons/e2_absorption.txt · Last modified: 2025/07/17 19:35 (external edit)