Operational configurations of the ECMWF Integrated Forecasting System (IFS)
These tables summarise the key characteristics of the ECMWF IFS model, offering links to documentation on data descriptions, graphical products, cycle information, resolution, etc..
In this page |
See also
|
Atmospheric general circulation component
|
Forecast / Analysis |
Number of members |
Horizontal resolution |
Vertical levels |
Pressure at model top (hPa) |
Perturbation models |
|
---|---|---|---|---|---|---|---|
HRES Atmospheric Model high resolution |
Forecast
|
1 |
|
0.01 hPa |
No |
||
ENS Ensemble - Atmospheric Model |
Forecast
|
51 |
Day 0-15
|
137 | 0.01 hPa |
Yes (4) |
|
Atmospheric Model Extended forecast (monthly) |
Forecast
|
51 |
|
0.01 hPa | Yes (4) | ||
4DVAR 4-Dimensional data assimilation
|
Analysis |
1 |
|
|
0.01 hPa |
No |
|
EDA Ensemble of data assimilations |
Analysis |
51 |
|
0.01 hPa |
Yes (5) |
||
SEAS5 2017 version Cycle 43r1 Seasonal forecast |
Forecast
|
51
15 |
|
0.01 hPa |
Yes (4) |
Ensemble and Seasonal re-forecasts
|
Forecast/Analysis |
Number of members |
Horizontal resolution |
Vertical levels |
Pressure at model top (hPa) |
Perturbation models |
Number of years |
|
---|---|---|---|---|---|---|---|---|
ENS
|
|
11 |
Day 0-15
Day 16-46
|
137 | 0.01 hPa | Yes (4) | Most recent 20 | |
SEAS5 Cycle 43r1 Seasonal forecast |
Forecast
|
25
15 |
|
|
0.01 hPa | Yes (4) | 36 (1981-2016) |
Ocean general and sea ice
|
Forecast/Analysis |
Number of members |
Horizontal resolution ORCA grid |
Vertical levels |
---|---|---|---|---|
NEMO (LIM-2) |
Forecast
|
51 |
0.25° |
75 |
Oceans
|
Analysis Reanalysis |
5 |
0.25° |
75 |
Ocean-wave component
|
Forecast/Analysis |
Domain |
Number of members |
Horizontal resolution |
---|---|---|---|---|
Ocean Wave coupled to the atmospheric model |
Analysis and forecast
|
Global |
1 |
|
Ensemble wave forecast
|
Forecast
|
Global |
51 |
0-15 days
16-46 days
|
SEAS-WAM Seasonal wave forecast |
Forecast
|
Global |
51 |
|
Atmospheric and Ocean-wave reanalysis ERA5
ERA5, based on IFS Cycle 41r2, is used to initialise ensemble reforecasts.
|
Forecast/Analysis |
Number of members |
Horizontal resolution |
Vertical levels |
Pressure at model top (hPa) |
Perturbation models |
|
---|---|---|---|---|---|---|---|
ERA5 HRES Atmospheric high resolution reanalysis |
|
1 |
|
137 | 0.01 | No | |
ERA5 EDA Atmospheric reduced resolution ensemble |
|
10 |
|
137 | 0.01 | Yes (5) | |
ERA5 wave Ocean wave model (WAM) reanalysis |
|
1 |
0.36 degrees |
1 | - | No | |
ERA5 wave EDA Ocean wave reduced resolution ensemble |
|
10 | 1.0 degrees | 1 | - | Yes (5) |
4D-Var data available for all the 4 entries.
(1) Native: as produced by the model on reduced Gaussian grids or spherical harmonics.
(2) Interpolated to lat/lon
(3) Native: as produced by the model on reduced lat/lon grids.
(4) in analysis and model physics
(5) in observations and model physics