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The high-resolution reanalysis system COSMO-REA6 has been developed based on the NWP model COSMO in a cooperation between Hans-Ertel-Centre for Weather Research (HErZ) and the German Meteorological Service (DWD).

The DWD provides selected COSMO-REA6 output under The data provided via ESGF underwent an additional CMIP/CORDEX-like standardisation ("CMORisation"), conducted in a cooperation between DKRZ and DWD within the OcMOD (Observations closer to MOdel Data) NFDI4Earth Pilot, and also comprises a different selection of parameters that was determined through a community survey.

The regional reanalysis system for Continental Europe matches the domain of the CORDEX EURO-11 specifications, albeit at a higher spatial resolution, i.e., 0.055° (6 km) instead of 0.11° (12 km). It comprises the assimilation of observational data using the existing nudging scheme of COSMO complemented by snow, SST and soil moisture analysis modules and uses ERA‚ÄźInterim data as lateral boundary conditions. The reanalysis data set covers the period 1995 to August 2019. Due to the end of production of the forcing global reanalysis ERA-Interim, COSMO-REA6 has also been discontinued. A second version of COSMO-REA6, that uses the data of the global reanalysis ERA5 as lateral boundary conditions, is currently under development at DWD.


Bollmeyer, C., et al. (2015): Towards a high-resolution regional reanalysis for the European CORDEX domain, Q. J. R. Meteorol. Soc., 141, 1–15,

Kaspar, F., et al., 2020: Regional atmospheric reanalysis activities at Deutscher Wetterdienst: review of evaluation results and application examples with a focus on renewable energy, Adv. Sci. Res., 17, 115–128,, 2020

Website of the University of Bonn:

Website of the DWD (in German):

Last Update: July 13, 2023, 7:27 a.m. by Admin User
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