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First operational forecast run: 1 November 2017
2. Configuration of the
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forecast model
Is the model coupled to an ocean model? Yes from day 0
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| Model | IFS Cycle 43r1 |
|---|---|
| Horizontal resolution and grid | Dynamics:TCO319 Cubic octahedral grid Physics: O320 Gaussian grid (35 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
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| 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 | 1 |
| Wave model | ECMWF wave model |
| Wave model resolution | 0.5 degrees |
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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 and leading singular vectors applied to some land fields | Ensemble data assimilation and leading singular vectors applied to some land fields |
| Soil moisture initialization | ERA-Interim land | ECMWF operations |
| Snow initialization | ERA-Interim land | ECMWF operations |
| Unperturbed control forecast? | Yes | Yes |
Detailed documentation: IFS cycle 43r1 documentation and seas5 user guide
Data assimilation method for control analysis: 4D Var (atmosphere) and 3DVAR (ocean/sea-ice)Resolution of model used to generate Control Analysis: TL1279L137
Ensemble initial perturbation strategy: Singular vectors + Ensemble Data Assimilation perturbations added to control analysis
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| Re-forecast | Forecast | |
|---|---|---|
| Ocean initialization | ORAS5 | ORTA5 |
| Ocean IC perturbations | Yes - generated through perturbations to assimilated observations and surface forcing | Yes - generated through perturbations to assimilated observations and surface forcing |
| Unperturbed control forecast? | No | No |
Ocean data assimilation details? References?
Source and treatment of SST? (Other data sources - altimetry?)
4. Model Uncertainties perturbations:
| Model dynamics perturbations | No |
|---|---|
| Model physics perturbations | 3-lev SPPT and SPBS |
| If there is a control forecast, is it perturbed? | Yes |
5. Forecast system and re-forecasts
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