Preprocessed atmospheric circulation and impact-relevant variables from ERA5 and "Extended ensemble forecast hindcast" (ECMWF) for unseen-awg simulations

Wider, Jonathan; Zscheischler, Jakob

Preprocessed atmospheric circulation and impact-relevant variables from ERA5 and "Extended ensemble forecast hindcast" (ECMWF) for unseen-awg simulations

hdl:21.14106/43da459a79e9f91e817e0b8690d494e8e91a00a5

Wider, Jonathan; Zscheischler, Jakob

Experiment

air temperature ECMWF ERA5 Geopotential height hindcast Precipitation re-analysis Reforecast

Summary: This experiment contains preprocessed data necessary for using unseen-awg simulations (impact-relevant variables) and for developing new weather generators (atmospheric circulation variables) for a European region. It provides a persistent, easy-to-use, and easy-to-access way of retrieving this data.

The data are based on two products by the European Centre for Medium-Range Weather Forecasts (ECMWF):
- The “Extended ensemble forecast hindcast" dataset [1] from cycle 48r1 of the Integrated Forecast System (IFS). We retrieved the data from ECMWFs Operational Archive. We include it here because accessing it directly from the Operational Archive is complicated by the need for a research license. Disclaimer: ECMWF does not accept any liability whatsoever for any error or omission in the data, their availability, or for any loss or damage arising from their use.
- Preprocessed daily ERA5 data retrieved from the Copernicus Climate Change Service [2, 3]. Neither the European Commission nor ECMWF is responsible for any use that may be made of the Copernicus information or data it contains.

Both datasets were retrieved under a Creative Commons Attribution 4.0 International (CC BY 4.0) license.

Preprocessing steps are detailed for each dataset, they include:
- aggregation to daily timescale
- horizontal regridding
- unit conversions and derivation of new variables
- restructuring data dimensions and metadata for the use with unseen-awg

[1] ECMWF (2023). IFS Documentation CY48R1 - Part V: Ensemble Prediction System. DOI: [https://doi.org/10.21957/E529074162](https://doi.org/10.21957/E529074162)
[2] Hersbach, H., Comyn-Platt, E., Bell, B., Berrisford, P., Biavati, G., Horányi, A., Muñoz Sabater, J., Nicolas, J., Peubey, C., Radu, R., Rozum, I., Schepers, D., Simmons, A., Soci, C., Dee, D., Thépaut, J-N., Cagnazo, C., Cucchi, M. (2023): ERA5 post-processed daily-statistics on pressure levels from 1940 to present. Copernicus Climate Change Service (C3S) Climate Data Store (CDS), DOI: [https://doi.org/10.24381/cds.4991cf48](https://doi.org/10.24381/cds.4991cf48)
[3] Copernicus Climate Change Service, Climate Data Store, (2024): ERA5 post-processed daily-statistics on single levels from 1940 to present. Copernicus Climate Change Service (C3S) Climate Data Store (CDS), DOI: [https://doi.org/10.24381/cds.4991cf48](https://doi.org/10.24381/cds.4991cf48)
Project: unseen-awg (unseen-awg: spatio-temporal weather generation using analogs and unseen data)
Contact: Jonathan Wider (
jonathan.wider@nullufz.de
0000-0002-5185-5768)
Location(s): Europe
Spatial Coverage: Longitude -80 to 40 Latitude 30 to 72.5
Temporal Coverage: 2003-01-01 to 2023-12-31 (standard)
Use constraints: Creative Commons Attribution 4.0 International (https://creativecommons.org/licenses/by/4.0/)
Data Catalog: World Data Center for Climate
Size: 181.46 GiB (194836586602 Byte)
Format: zip-file
Status: completely archived
Creation Date: 2026-04-02
Review Date: 2026-04-21

Find data Export dataset acronyms

Cite as: Wider, Jonathan; Zscheischler, Jakob (2026). Preprocessed atmospheric circulation and impact-relevant variables from ERA5 and "Extended ensemble forecast hindcast" (ECMWF) for unseen-awg simulations. World Data Center for Climate (WDCC) at DKRZ. https://www.wdc-climate.de/ui/entry?acronym=unsawg_inp

BibTeX RIS

Contact type	Person	ORCID	Organization
Contact	Jonathan Wider	0000-0002-5185-5768	Helmholtz Centre for Environmental Research
Author	Jonathan Wider	0000-0002-5185-5768	Helmholtz Centre for Environmental Research
Author	Prof. Dr. Jakob Zscheischler	0000-0001-6045-1629	Helmholtz Centre for Environmental Research
Investigator	Jonathan Wider	0000-0002-5185-5768	Helmholtz Centre for Environmental Research

Is variant form of

[1] DOI ECMWF. (2023). IFS Documentation CY48R1 - Part V: Ensemble Prediction System. doi:10.21957/e529074162

[2] Hersbach, H.; Comyn-Platt, E.; Bell, B.; Berrisford, P.; Biavati, G.; Horányi, A.; Muñoz Sabater, J.; Nicolas, J.; Peubey, C.; Radu, R.; Rozum, I.; Schepers, D.; Simmons, A.; Soci, C.; Dee, D.; Thépaut, J-N.; Cagnazo, C.; Cucchi, M. (2024). ERA5 post-processed daily-statistics on pressure levels from 1940 to present. https://doi.org/10.24381/cds.4991cf48

[3] Copernicus Climate Change Service, Climate Data Store. (2024). ERA5 post-processed daily-statistics on single levels from 1940 to present. https://doi.org/10.24381/cds.4991cf48

Is source of

[1] DOI Wider, Jonathan; Zscheischler, Jakob. (2026). An instance of the analog weather generator unseen-awg with precomputed similarities and a large set of generated weather data. doi:10.26050/WDCC/unsawg_wg

Attached Dataset Groups ( 2 )

Parent project(s)

unseen-awg: spatio-temporal weather generation using analogs and unseen data

[Entry acronym: unsawg_inp] [Entry id: 5369849]