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1. Forecast system version
System name: CMCC-SPS3
First operational forecast run: 1st April, 2018
2. Configuration of the forecast model
Is it a coupled model? YES
Coupling frequency:
Atmosphere-Ocean: 90 minutes (every third timestep of atmospheric model)
Atmosphere-Land: 30 minutes (also timestep of atmospheric model)
Atmosphere-Sea Ice: (Better use more specific question? Here or elsewhere?30 minutes (also timestep of atmospheric model)
2.1 Atmosphere and land surface
| Model | CAM 5.3 (Atmosphere) CLM 4.5 (land surface) |
|---|---|
| Horizontal resolution and grid | 1° lat-lon approx |
| Atmosphere vertical resolution | 46 vertical levels |
| Top of atmosphere | 0.2 hPa (60 km approx.) |
| Soil levels | 10 |
| Time step | 30 minutes |
Detailed documentation:
CAM Model documentation
CLM Model documentationMore model details? (e.g. land surface model?)
2.1 Ocean and cryosphere
| Ocean model | NEMO v3.4 |
|---|---|
| Horizontal resolution | 1/4° |
| Vertical resolution | 50 vertical levels |
| Time step | 18 minutes |
| Sea ice model | CICE |
| Sea ice model resolution | 1/4° |
| Sea ice model levels | 1 thicknes sonly |
| Wave model | NO |
| Wave model resolution | N/A |
Detailed documentation: NEMO documentation
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| Hindcast | Forecast | |
|---|---|---|
| Atmosphere initialization | ERA Interim | ECMWF operational analysis |
| Atmosphere IC perturbations | 10 | 10 |
Land Initialization | Forced (obs. atmosphere) monthly run initialized from 10-year spin-up | Forced (obs. atmosphere) monthly run initialized from 10-year spin-up |
| Land IC perturbations | 3 | 3 |
| Soil moisture initialization | From land initialization | From land initialization |
| Snow initialization | From land initialization | From land initialization |
| Unperturbed control forecast? | NO | NO |
Detailed documentation:
More DA details?details N/A
Data assimilation method for control analysis: ECMWF operational
Horizontal and vertical resolution of perturbations: T42L91 SVs+ T399L137 EDA perturbationsperturbation: N/A
Perturbations in +/- pairs: Yes NO
3.2 Ocean and cryosphere
| Hindcast | Forecast | |
|---|---|---|
| Ocean initialization | C-GLORS Global Ocean 3D-VAR | C-GLORS Global Ocean 3D-VAR |
| Ocean IC perturbations | 4 | 8 |
| Unperturbed control forecast? | NO | NO |
Detailed documentation:
More ocean data assimilation details?
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7. Where to find more information
Sanna, A., 2017: CMCC-SPS3: The CMCC Seasonal Prediction System 3