...
| title | WORK IN PROGRESS... |
|---|
| Table of Contents | ||
|---|---|---|
|
1. Forecast system version
Identifier code: JMA/MRI-CPS2CPS3
First operational forecast run: June 2015 February 2022
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 |
TL319 (approx. |
55km) |
| Atmosphere vertical resolution |
|---|
| L100 | |
| Top of atmosphere | 0. |
|---|
| 01hPa |
| Soil levels |
|---|
Soil temperature : 1
| (layers) | 7 Layer 1 : 0 - 0.02 m |
|---|
| Time step |
|---|
| 20 minutes |
Detailed documentation:
JMA, 20132019: Outline of the operational numerical weather prediction at the Japan Meteorological Agency, . Appendix to WMO Technical Progress Report on the Global Data-processing and Forecasting System (GDPFS) and Numerical Weather Prediction (NWP) Research. Japan Meteorological Agency, Tokyo, Japan.Research. Appendix to WMO Technical Progress Report on the Global Data-processing and Forecasting System and Numerical Weather Prediction, Tokyo, Japan.
2.2 Ocean and cryosphere
| Ocean model | MRI.COM v3v4.6 |
|---|---|
| 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 more information 25ºx0.25º on a tripolar grid) |
| Vertical resolution | L52 + Bottom Boundary Layer (BBL)L60 |
| Time step | 20 10 minutes |
| Sea ice model | part of MRI.COM v3v4.6 |
| Sea ice model resolution | same as ocean model |
| Sea ice model levels | 5 categories + open water |
| Wave model | None |
| Wave model resolution | N/A |
Detailed documentation:
Tsujino, H., T. Motoi, I. Ishikawa, H. Nakano, K. Sakamoto, S. Urakawa, M. Hirabara, H. NakanoIshizaki, and G. Yamanaka, T. Yasuda, and H. Ishizaki, 20102017: Reference manual for the Meteorological Research Re-search Institute Community Ocean Model version 4 (MRI.COM) version 3. Technical Reports of the Meteorological Research Institute, 59, 273ppCOMv4). Tech. Rep. MRI, 80.
3. Initialization and initial condition (IC) perturbations
3.1 Atmosphere and land
| Hindcast | Forecast | |
|---|---|---|
| Atmosphere initialization | Japanese 55-year Reanalysis Reanalysis for Three Quarters of a Century (JRA-553Q)Japanese 55-year Reanalysis (JRA-55 | Global Analysis (GA) |
| Atmosphere IC perturbations | Breeding Growth Method (BGM) | Breeding Growth Method (BGM) |
Land Initialization | Offline model runs forced by JRA-553Q | Offline model runs forced by JRA-553Q and GA |
| Land IC perturbations | None | None |
| Soil moisture initialization | Offline model runs forced by JRA-553Q | Offline model runs forced by JRA-553Q and GA |
| Snow initialization | Offline model runs forced by JRA-553Q | Offline model runs forced by JRA-553Q and GA |
| Unperturbed control forecast? | NoneYesNone | Yes |
Data assimilation method for control analysis: 4D-VAR (atmosphere) and 3D 4D-VAR (ocean)
Horizontal and vertical resolution of perturbations: TL159L60 TL319L100
Perturbations in +/- pairs: Yes
Detailed documentation:
Kobayashi, S., Y. OtaKosaka, YJ. HaradaChiba, AT. EbitaTokuhiro, MY. Moriya, H. Onoda, K. Onogi, H. Kamahori, Harada, C. Kobayashi , and H. Endo, K. Miyaoka, and K. Takahashi, 2015: The JRA-55 reanalysis: General specifications and basic characteristics. J. Meteor. Soc. Japan, 93, 5-48Naoe, 2021: JRA-3Q: Japanese Reanalysis for Three Quarters of a Century. WCRP-WWRP Symposium on Data Assimilation and Reanalysis/ECMWF annual seminar 2021.
3.2 Ocean and cryosphere
| Hindcast | Forecast | ||
|---|---|---|---|
| Ocean initialization | Multivariate Ocean Variational Estimation (MOVE)/MRI.COM Global 2 3 system (MOVE/MRI.COM-G2G3) | Multivariate Ocean Variational Estimation (MOVE)/MRI.COM Global 2 3 system (MOVE/MRI.COM-G2G3) | |
| Ocean IC perturbations | MOVE/MRI-COM-G2 driven by JRA-55 with BGM perturbation | Ensemble perturbations approximating analysis error covariances using minimization histories | Ensemble perturbations approximating analysis error covariances using minimization historiesMOVE/MRI-COM-G2 driven by JRA-55 with BGM perturbation |
| Unperturbed control forecast? | NoneYesNone | Yes |
Detailed documentation:Toyoda T
Usui, N., Y. Fujii, T. Yasuda, N. Usui, T. Iwao, T. Kuragano, K. Sakamoto, and M. Kamachi, 20132015: Improved analysis Development of seasonal-interannual fields using a global ocean data assimilation system. Theor Appl Mech Jpn, 61, 31-48.a Four-Dimensional Variational Assimilation System toward Coastal Data Assimilation around Japan. Mon. Wea. Rev., 143, 3874-3892.
https://ds.data.jma.go.jp/tcc/tcc/products/elnino/move_mricom-g3_doc.html
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:
5. Forecast system and hindcasts
| Forecast frequency | Every 5 daysdaily |
|---|---|
| Forecast ensemble size | 135 per day |
| Hindcast years | 19811991-20162020 |
| 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 14 and 29 |
| September | 3, 8, 13, 18, 23 and 13 and 28 |
| October | 3, 8, 13, 18, 23 and 13 and 28 |
| November | 2, 7, 12, 17, 22 and 12 and 27 |
| December | 2, 7, 12, 17, 22 and 12 and 27 |
7. Where to find more information
https://ds.data.jma.go.jp/tcc/tcc/products/model/outline/cps3_description.html
https://ds.data.jma.go.jp/tcc/tcc/products/elnino/move_mricom-g3_doc.html