Advances in Science and Research
Advances in Science and Research
ASR
Articles | Volume 22
Articles | Volume 22
https://doi.org/10.5194/asr-22-149-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/asr-22-149-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 22
11 May 2026
 | 11 May 2026

The regional reanalysis COSMO-R6G2 as a successor to COSMO-REA6: evaluation for renewable energy applications

Franziska Bär, Michael Borsche, Frank Kaspar, Thomas Spangehl, Dehong Yuan, David Geiger, and Lukas Pauscher

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Latest update: 08 Jun 2026
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Short summary
COSMO-REA6 is widely used in energy applications but has known deficits. Its successor, COSMO-R6G2, is evaluated for Germany, focusing on Global Horizontal Irradiance (GHI) as well as wind speed. It shows slightly lower GHI and good wind quality in flat areas, but underestimates night-time wind in mountains. Overall, it is a useful successor, though users should consider remaining limitations.
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