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intercomparisons:scoremip

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.txt · Last modified: 2014/10/30 10:14 (external edit)