EMS Annual Meeting Abstracts
Vol. 18, EMS2021-389, 2021, updated on 18 Apr 2023
https://doi.org/10.5194/ems2021-389
EMS Annual Meeting 2021
© Author(s) 2023. This work is distributed under
the Creative Commons Attribution 4.0 License.

Copernicus European regional reanalysis

Semjon Schimanke1, Ludvig Isaksson1, Lisette Edvinsson1, Martin Ridal1, Lars Berggren1, Susanna Hopsch1, Adam El-Said2, Michael Glinton2, Eric Bazile2, Patrick Le Moigne2, Antoine Verrelle2, Per Dahlgren3, and Roger Randriamampianina3
Semjon Schimanke et al.
  • 1SMHI, Norrköping, Sweden (semjon.schimanke@smhi.se)
  • 2Météo-France, Toulouse, France
  • 3MET Norway, Oslo, Norway

The Copernicus European regional reanalysis (https://climate.copernicus.eu/regional-reanalysis-europe) is produced as part of the Copernicus Climate Change Service (C3S). The presentation will introduce the service and its main objectives as well as it will give and overview of available data. Data quality will be demonstrated by comparison with ERA5 and other gridded datasets.

In the first phase of the service, systems inherited from the FP7 project UERRA (Uncertainties in Ensembles of Regional ReAnalyses, http://www.uerra.eu) were applied extending the UERRA-HARMONIE as well as the MESCAN-SURFEX datasets. These datasets contain analyses of the atmosphere, the surface and the soil. UERRA-HARMONIE is a full model system including a 3D-Var data assimilation scheme for upper air observations and an OI-scheme for surface observations. MESCAN-SURFEX is a complementary 2D surface analysis system interfaced to a land surface model. Data is available for entire Europe at a horizontal resolution of 11 km for UERRA-HARMONIE and at 5.5 km for MESCAN-SURFEX. The systems provide four analyses per day – at 0 UTC, 6 UTC, 12 UTC, and 18 UTC. Between the analyses ranges, forecasts of the systems are available with hourly resolution. More than fifty parameters are available on various level types. Data are available for the period 1961 – July 2019 through Copernicus Climate Data Store (CDS).

In spring 2020, the service started the production of the next generation regional reanalysis. The successor comprises three components:
- CERRA (5.5 km horizontal resolution)
- CERRA-EDA (10-member ensemble at 11 km resolution)
- CERRA-Land (5.5 km horizontal resolution)

In addition to the higher resolution, CERRA is more sophisticated than UERRA. For instance, more observations are assimilated into CERRA, in particular remote sensing data. CERRA is produced with 3-hourly cycling and a flow depending part of the B-matrix is derived from CERRA-EDA. The production of CERRA, CERRA-EDA and CERRA-Land will complete in September/October 2021 and data will become available in the CDS shortly thereafter.

The quality of the regional reanalysis in comparison to ERA5 will be shown with results of the standard HARMONIE-verification package as well as based on certain case studies. For instance, the winter storm Gudrun (January 2005, southern Sweden) will be investigated.

How to cite: Schimanke, S., Isaksson, L., Edvinsson, L., Ridal, M., Berggren, L., Hopsch, S., El-Said, A., Glinton, M., Bazile, E., Le Moigne, P., Verrelle, A., Dahlgren, P., and Randriamampianina, R.: Copernicus European regional reanalysis, EMS Annual Meeting 2021, online, 6–10 Sep 2021, EMS2021-389, https://doi.org/10.5194/ems2021-389, 2021.

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