...
Is it a coupled model? YES
Coupling frequency:
Atmosphere-Ocean: 90 minutes (every third full-timestep of atmospheric model)
Atmosphere-Land: 30 minutes (also full-timestep of atmospheric model)
Atmosphere-Sea Ice: 30 minutes (also full-timestep of atmospheric model)
2.1 Atmosphere and land surface
| Model | CAM 5.3 (Atmosphere) CLM 4.5 (land surface) |
|---|---|
| Horizontal resolution and grid | 1/2° 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 http://www.cesm.ucar.edu/models/cesm1.2/cam/
CLM Model documentation http://www.cesm.ucar.edu/models/cesm1.2/clm/
Gualdi et al, 2020, CMCC Tech. Rep. RP0XXX, YYpp. Available at address: https://www.cmcc.it/it/publications/rp0XXX-cmcc-sps3.5-the-cmcc-seasonal-prediction-system-3.5
2.2 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 4.0 |
| Sea ice model resolution | 1/4° |
| Sea ice model levels | 1 thickness only |
| Wave model | NO |
| Wave model resolution | N/A |
...
Perturbations in +/- pairs: 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 available at http://c-glors.cmcc.it/index/index.html
4. Model uncertainties perturbations:
| Model dynamics perturbations | NO |
|---|---|
| Model physics perturbations | YES (Ocean Model only, only during perturbed data assimilation cycles) |
If there is a control forecast, is it perturbed? |
| There ius no Control Forecast |
Detailed documentation: N/A
...
https://www.cmcc.it/it/publications/rp0285-cmcc-sps3-the-cmcc-seasonal-prediction-system-3
Gualdi, S., A. Sanna, A. Borrelli, A. Cantelli, M. del Mar Chaves Montero, S. Tibaldi, 2017: CMCC-SPS3: CMCC-SPS3: The CMCC Seasonal Prediction System 3.5. Centro Euro-Mediterraneo sui Cambiamenti Climatici. CMCC Tech. Rep. RP0XXX, YYpp. Available at address:
https://www.cmcc.it/it/publications/rp0XXX-cmcc-sps3.5-the-cmcc-seasonal-prediction-system-3.5