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| |
|---|---|
| System name (version) | ERA5 |
| Date of implementation | 2016 |
41r2 (2016)?
2. Configuration | |
|---|---|
Earth system components included in the analysis system (e.g., ocean, sea-ice, land, etc.) | |
Horizontal resolution of the model, with indication of grid spacing in km (for the different Earth system component included in the model) | TL639, 31 km atmosphere 0.36o ocean waves |
Number of levels in the different Earth system components (for the different Earth system component included in the model) | 137 levels in the atmosphere |
| Frequency of the outputs | 1-hourly |
| Top of the atmospheric model | 1 Pa |
| Number of analysis cycle per day | 2 |
| Earliest start date | 1 January 1940 |
| Integration time step | The model time step is 12 minutes for the HRES and 20 minutes for the EDA, though occasionally these numbers are adjusted to cope with instabilities |
| Length and frequency of the longest forecast | 18 hour forecasts initialised twice daily from analyses at 06 and 18 UTC |
| Dataset latency | ERA5T 5 days behind real time (preliminary product) ERA5 2–3 months (final product) |
Additional comments:
IFS cycle 41r2 used.
| 3. Analysis system | |
| Data assimilation method | 4D-Var |
| Length of the analysis window | 12 hours |
| Number of ensemble members and their resolution | 10, TL319, 63km |
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Full details of cycle 41r2: Detailed information of implementation of IFS cycle 41r2
Detailed updated documentation on ERA5: ERA5: data documentation
| 6. Further information | |
| Operational contact point | Hans Hersbach, hans.hersbach@ecmwf.int |
| URL of the technical note/ reference paper | Hersbach et al. (2020) https://rmets.onlinelibrary.wiley.com/doi/full/10.1002/qj.3803 DOI: 10.1002/qj.3803 |
| URL for list of products | https://cds.climate.copernicus.eu/datasets?q=era5 |
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