COSMO Regional Reanalysis

Post-Processed Radiation

A first evaluation of the European COSMO-REA6 reanalysis data set with respect to the representation of global horizontal radiation using the quality-controlled measurements of the Baseline Surface Radiation Network (BSRN) revealed systematic underestimation under clear sky conditions and overestimation during cloudy conditions.
Therefore a post-processing using orthogonal distance regression has been developed and applied in order to reduce the deviation of the reanalysis from the observations. Cross validation results show a general reduction of systematic biases for independent sites for the post-processed (COSMO-REA6pp) data set.

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The post-processed data set is available for download in a 15-minute interval on the European COSMO-REA6 domain at 6km horizontal resolution:
ftp://ftp.meteo.uni-bonn.de/pub/reana/derived.data/GLOB_RAD_PP/

The netCDF-files contain original and post-processed instantaneous data:

Variable	Description	Level/Type	Period
GLOB_RAD_PP	Post-processed global radiation	surface	1995-2014
GLOB_RAD	Global radiation from COSMO-REA6	surface	1995-2014

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Reference

• Frank, C., S. Wahl, J. D. Keller, B. Pospichal, A. Hense, S. Crewell (2018): A novel data set for solar energy applications based on high resolution reanalysis, Solar Energy, 164, 12-24, doi.org/10.1016/j.solener.2018.02.012