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1. Forecast system version
Identifier code: SEAS5
First operational forecast run: 1 November 2017
2. Configuration of the forecast model
Is the model coupled to an ocean model? Yes from day 0
Coupling frequency: 1 hour
2.1 Atmosphere and land surface
| Model | IFS Cycle 43r1 | |
|---|---|---|
| Horizontal resolution and grid | Dynamics:TCO319 Cubic octahedral grid Physics: O320 Gaussian grid (36 km) | |
| Atmosphere vertical resolution | L91 (0.01 hPa)||
| Top of atmosphere | 0.01 hPa (approx. 80 km) | |
| Soil levels | 4 | |
| Time step | 20 minutes
Detailed documentation: IFS cycle 43r1 documentation
2.1 Ocean and cryosphere
| Ocean model | NEMO v3.4 | |
|---|---|---|
| Horizontal resolution | ORCA 0.25 | |
| Vertical resolution | L75 | |
| Time step | 1 hour | |
| Sea ice model | LIM2||
| Sea ice model resolution | ORCA 0.25||
| Sea ice model levels | N/A | |
| Wave model | ECMWF wavemodel | |
| Wave model resolution | 0.5 degrees |
Detailed documentation: NEMO documentation and IFS cycle 43r1 documentation
3. Initialization and initial condition (IC) perturbations
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| Re-forecast | Forecast | |||
|---|---|---|---|---|
| Atmosphere initialization | ERA-Interim | ECMWF Operations | ||
| Atmosphere IC perturbations | Ensemble data assimilation and leading singular vectors applied to upper air variables | Ensemble data assimilation and leading singular vectors applied to upper air variables | ||
Land Initialization | ERA-Interim land (43r1)ECMWF Operations | |||
| Land IC perturbations | Ensemble data assimilation applied to some land fields | Ensemble data assimilation applied to some land fields|||
| Soil moisture initialization | ERA-Interim landECMWF operations | |||
| Snow initialization | ERA-Interim land | ECMWF operations|||
| Unperturbed control forecast? | Yes | Yes
Detailed documentation: IFS cycle 43r1 documentation and SEAS5 user guide
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