International Polarized Radiative Transfer

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====== SWIR Carbon Observation Retrieval Model Intercomparison Project (SCORE-MIP) ======

Hartmut Boesch, Andre Butz, Yukio Yoshida, and Claudia Emde

===== Comparison of scalar and vector radiative transfer codes =====

**Objective:** Radiative transfer intercomparisons of scalar and
vector RT codes for synchronized layer properties for the SWIR
spectral range. 

**Brief description of the experiment:**
For a range of
different geophysical scenarios with given optical layer properties
(optical depth, single scattering albedo and scattering matrix) the
top-of-atmosphere radiances will be calculated for three narrow
spectral ranges in the oxygen A Band, the 1.6 micron CO2 band and the
2.03 micron CO2 band. The geophysical scenarios considered for this
experiment will contain different aerosol and cirrus loadings and
solar zenith angles. We will consider only nadir observations for
Lambertian surfaces and sunglint observations (viewing zenith angle =
solar zenith angle) for ocean surfaces. For each scenario, we will
then compare the calculated intensities I (scalar) and I-Q (vector)
obtained with different RT codes. It is planned to carry out the
calculations with a RT code with standardized setup with parameters
chosen for high accuracy and with an ‘operational’ version that will
allow faster RT calculations. We will also keep track of clock time
since we are interested in RT codes that can be run on large number of
retrievals. 
  * [[intercomparisons:scoremip:setup|Setup]]
  * [[intercomparisons:scoremip:results|Results]]

International Polarized Radiative Transfer

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