| Table of Contents | ||
|---|---|---|
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1. Forecast system version
Identifier code: JMA/MRI-CPS2
First operational forecast run: June 2015
2. Configuration of the forecast model
Is the model coupled to an ocean model? Yes
Coupling frequency: 1 hour
2.1 Atmosphere and land surface
| Model | JMA-GSM |
|---|---|
| Horizontal resolution and grid | TL159 (approx. 110km) |
| Atmosphere vertical resolution | L60 |
| Top of atmosphere | 0.1hPa |
| Soil levels | Soil temperature : 1 Soil moisture : 3 |
| Time step | 30 minutes |
2.2 Ocean and cryosphere
| Ocean model | MRI.COM v3 |
|---|---|
| Horizontal resolution | 1ºx0.3º -0.5º on a tripolar grid (See https://ds.data.jma.go.jp/tcc/tcc/products/elnino/move_mricom-g2_doc.html for Toyoda et al. 2013 for more information on a tripolar grid) |
| Vertical resolution | L52 + Bottom Boundary Layer (BBL) |
| Time step | 20 minutes |
| Sea ice model | part of MRI.COM v3 |
| Sea ice model resolution | same as ocean model |
| Sea ice model levels | 5 categories + open water |
| Wave model | None |
| Wave model resolution | N/A |
3. Initialization and initial condition (IC) perturbations
3.1 Atmosphere and land
| Hindcast | Forecast | |
|---|---|---|
| Atmosphere initialization | Japanese 55-year Reanalysis (JRA-55) | Japanese 55-year Reanalysis (JRA-55) |
| Atmosphere IC perturbations | Breeding Growth Method (BGM) | Breeding Growth Method (BGM) |
Land Initialization | JRA-55 | JRA-55 |
| Land IC perturbations | None | None |
| Soil moisture initialization | JRA-55 | JRA-55 |
| Snow initialization | JRA-55 | JRA-55 |
| Unperturbed control forecast? | None | None |
...
3.2 Ocean and cryosphere
| Hindcast | Forecast | |
|---|---|---|
| Ocean initialization | Multivariate Ocean Variational Estimation (MOVE)/MRI.COM Global 2 system (MOVE/MRI.COM-G2) | Multivariate Ocean Variational Estimation (MOVE)/MRI.COM Global 2 system (MOVE/MRI.COM-G2) |
| Ocean IC perturbations | MOVE/MRI-COM-G2 driven by JRA-55 with BGM perturbation | MOVE/MRI-COM-G2 driven by JRA-55 with BGM perturbation |
| Unperturbed control forecast? | None | None |
Detailed documentation: Toyoda T., Y. Fujii, T. Yasuda, N. Usui, T. Iwao, T. Kuragano, and M. Kamachi, 2013: Improved analysis of seasonal-interannual fields using a global ocean data assimilation system. Theor Appl Mech Jpn, 61, 31-48.
4. Model Uncertainties perturbations:
| Model dynamics perturbations | None |
|---|---|
| Model physics perturbations | Stochastically Perturbed Parametrization Tendencies (SPPT) scheme |
If there is a control forecast, is it perturbed? | Yes |
Detailed documentation: Yonehara, H. and M. Ujiie, 2011: A stochastic physics scheme for model uncertainties in the JMA one-week ensemble prediction system. CAS/JSC WGNE Res. Act. Atmos. Ocean Model/WMO, 41, 6.09–6.10.
5. Forecast system and hindcasts
| Forecast frequency | Every 5 days |
|---|---|
| Forecast ensemble size | 13 |
| Hindcast years | 1981-2016 |
| Hindcast ensemble size | 10 (5 members with 15-day Lagged Average Forecast) |
| On-the-fly or static hindcast set? | static |
6. Other relevant information
The available hindcast start dates are as follows:
(NOTE: hindcasts are just available for dates highlighted in bold and underlined)
| Start Month | Available Start Days |
|---|---|
| January | 1, 6, 11, 16, 21, 26 and 31 |
| February | 5, 10, 15, 20 and 25 |
| March | 2, 7, 12, 17, 22 and 27 |
| April | 1, 6, 11, 16, 21 and 26 |
| May | 1, 6, 11, 16, 21, 26 and 31 |
| June | 5, 10, 15, 20, 25 and 30 |
| July | 5, 10, 15, 20, 25 and 30 |
| August | 4, 9, 14, 19, 24 and 29 |
| September | 3, 8, 13, 18, 23 and 28 |
| October | 3, 8, 13, 18, 23 and 28 |
| November | 2, 7, 12, 17, 22 and 27 |
| December | 2, 7, 12, 17, 22 and 27 |
7. Where to find more information
General information:
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