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For a record of changes made to this page please refer to Document versions.
Further information and advice regarding the upgrade can be obtained from User Support.
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- Improvements in convection scheme (entrainment, CAPE closure, shallow convection).
- Activate LW scattering in radiation scheme.
- 3D aerosol climatology replaces 2D climatology.
- Correct scaling of dry mass flux in diffusion scheme.
- Improvement of the TL/AD of the semi-Lagrangian departure point scheme in the polar cap area.
- Fix instability in 2m temperature diagnostic related to wet tile.
- Bug fix in the computation of rain amount that could freeze when intercepted by the snow-pack.
- New parametrisations for wind input and deep water dissipation for for the wave model.
- Limit on wave spectrum for very shallow water and minimum depth set to 3m.
- ENS makes use of 50 EDA-members and initial perturbations are made exchangeable.
- ENS radiation time-step is reduced from 3 hours to 1 hour, to be consistent with HRES.
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| paramId | shortName | name | Description | units | GRIB edition | Components | Test data available | Dissemination | ecCharts | Added to the Catalogue |
|---|---|---|---|---|---|---|---|---|---|---|
Near-surface wind output | ||||||||||
| 228239 | 200u | 200 metre U wind component | eastward component of the 200m wind. | m s-1 | 1 | HRES / ENS |   | |   | |
| 228240 | 200v | 200 metre V wind component | northward component of the 200m wind. | m s-1 | 1 | HRES / ENS | | | | |
| Wave model parameters | ||||||||||
| 140098 | weta | Wave induced mean sea level correction | Wave induced mean sea level correction | m | 1 | HRES-WAM / HRES-SAW / ENS-WAM | | | | |
| 140099 | wraf | Ratio of wave angular and frequency width | Ratio of wave angular and frequency width | dimensionless | 1 | HRES-WAM / HRES-SAW / ENS-WAM | | | | |
| 140100 | wnslc | Number of events in freak waves statistics | Number of events in freak waves statistics | dimensionless | 1 | HRES-WAM / HRES-SAW / ENS-WAM | | | | |
| 140101 | utaua | U-component of atmospheric surface momentum flux | U-component of atmospheric surface momentum flux | N m-2 | 1 | HRES-WAM / HRES-SAW / ENS-WAM | | | | |
| 140102 | vtaua | V-component of atmospheric surface momentum flux | V-component of atmospheric surface momentum flux | N m-2 | 1 | HRES-WAM / HRES-SAW / ENS-WAM | | | | |
| 140103 | utauo | U-component of surface momentum flux into ocean | U-component of surface momentum flux into ocean | N m-2 | 1 | HRES-WAM / HRES-SAW / ENS-WAM | | | | |
| 140104 | vtauo | V-component of surface momentum flux into ocean | V-component of surface momentum flux into ocean | N m-2 | 1 | HRES-WAM / HRES-SAW / ENS-WAM | | | | |
| 140105 | wphio | Wave turbulent energy flux into ocean | Wave turbulent energy flux into ocean | W m-2 | 1 | HRES-WAM / HRES-SAW / ENS-WAM | | | | |
| Ocean parameters available at the surface, produced by the NEMO model - see also here | ||||||||||
| 174098 | sithick | Sea-ice thickness * | Sea-ice thickness | m | 1 | HRES / ENS | | | | |
| 151148 | mld | Mixed layer depth * | Mixed layer depth | m | 1 | HRES / ENS | | | | |
| 151145 | zos | Sea surface height * | Sea surface height | m | 1 | HRES / ENS | | | | |
| 151163 | t20d | Depth of 20C isotherm * | Depth of 20C isotherm | m | 1 | HRES / ENS | | | | |
| 151130 | so | Sea water practical salinity * | Sea water practical salinity | psu | 1 | HRES / ENS | | | | |
| 151164 | tav300 | Average potential temperature in the upper 300m * | Average potential temperature in the upper 300m | degrees C | 1 | HRES / ENS | | | | |
| 151175 | sav300 | Average salinity in the upper 300m * | Average salinity in the upper 300m | psu | 1 | HRES / ENS | | | | |
| * All fields are masked on land and lake points. tav300 and sav300 are masked on ocean points with depth < 300m. | ||||||||||
| Parameters on Potential Vorticity levels (1.5 and 2 PVU) - see also here | ||||||||||
| 129 | z | Geopotential | This parameter is the gravitational potential energy of a unit mass, at a particular location, relative to mean sea level. | m2 s-2 | 1 | HRES / ENS * | | | | |
| 203 | o3 | Ozone mass mixing ratio | This parameter is the mass of ozone per kilogram of air. | kg kg-1 | 1 | HRES / ENS * | | | | |
| 3 | pt | Potential Temperature | Potential Temperature | K | 1 | HRES / ENS * | | | | |
| 54 | pres | Pressure | Pressure | Pa | 1 | HRES / ENS * | | | | |
| 133 | q | Specific humidity | This parameter is the mass of water vapour per kilogram of moist air. | kg kg-1 | 1 | HRES / ENS * | | | | |
| 131 | u | U component of wind | This parameter is the eastward component of the wind. It is the horizontal speed of air moving towards the east, in metres per second. A negative sign thus indicates air movement towards the west. | m s-1 | 1 | HRES / ENS * | | | | |
| 132 | v | V component of wind | This parameter is the northward component of the wind. It is the horizontal speed of air moving towards the north, in metres per second. A negative sign thus indicates air movement towards the south. | m s-1 | 1 | HRES / ENS * | | | | |
* The perturbed forecasts for the ENS only contain the parameters pt, u and v. | ||||||||||
| Ensemble probabilities | ||||||||||
| 131098 | tpg25 | Total precipitation of at least 25 mm | Total precipitation of at least 25 mm (24h periods; T+0-24,12-36,...,334-360) | % | 2 | ENS | | | | |
| 131099 | tpg50 | Total precipitation of at least 50 mm | Total precipitation of at least 50 mm (24h periods; T+0-24,12-36,...,334-360) | % | 2 | ENS | | | | |
| 131085 | tpg100 | Total precipitation of at least 100 mm | Total precipitation of at least 100 mm (24h periods; T+0-24,12-36,...,334-360) | % | 2 | ENS | | | | |
| 131100 | 10fgg10 | 10 metre wind gust of at least 10 m/s | 10 metre wind gust of at least 10 m/s (Maximum within a 24h period; T+0-24,12-36,...,334-360) | % | 2 | ENS | | | | |
| 133093 | ptsa_gt_1stdev | Probability of 850hPa temperature standardized anomaly greater than 1 standard deviation | Probability of temperature anomaly greater than 1 standard deviation of the climatology. | % | 2 | ENS | | | | |
| 133094 | ptsa_gt_1p5stdev | Probability of 850hPa temperature standardized anomaly greater than 1.5 standard deviation | Probability of temperature anomaly greater than 1.5 standard deviation of the climatology. See also here. | % | 2 | ENS | | | | |
| 133095 | ptsa_gt_2stdev | Probability of 850hPa temperature standardized anomaly greater than 2 standard deviation | Probability of temperature anomaly greater than 2 standard deviation of the climatology. See also here. | % | 2 | ENS | | | | |
| 133096 | ptsa_lt_1stdev | Probability of 850hPa temperature standardized anomaly less than -1 standard deviation | Probability of temperature anomaly less than -1 standard deviation of the climatology. See also here. | % | 2 | ENS | | | | |
| 133097 | ptsa_lt_1p5stdev | Probability of 850hPa temperature standardized anomaly less than -1.5 standard deviation | Probability of temperature anomaly less than -1.5 standard deviation of the climatology. See also here. | % | 2 | ENS | | | | |
| 133098 | ptsa_lt_2stdev | Probability of 850hPa temperature standardized anomaly less than -2 standard deviation | Probability of temperature anomaly less than -2 standard deviation of the climatology. See also here. | % | 2 | ENS | | | | |
| Ensemble mean / Ensemble standard deviation | ||||||||||
| 10 | ws * | The speed of horizontal air movement in metres per second. | The speed of horizontal air movement in metres per second. | m s-1 | 1 | ENS | | | | |
| 130 | t * | This parameter is the temperature in the atmosphere. | This parameter is the temperature in the atmosphere. | K | 1 | ENS | | | | |
| * These parameters have been added at 250 hPa. | ||||||||||
| Extreme Forecast Index (EFI) & Shift Of Tails (SOT) | ||||||||||
| 132045 | wvfi | Water vapour flux index | EFI and SOT for water vapour flux. See also here. | (-1 to 1) | 1 | ENS | | | | |
| 132167 | 2ti | 2 metre temperature index | EFI and SOT for weekly mean temperature (out to week 6). See also here. | (-1 to 1) | 1 | ENS-EXTENDED | | | | |
| 132228 | tpi | Total precipitation index | EFI and SOT for 1 week total precipitation (out to week 6). See also here. | (-1 to 1) | 1ww | ENS-EXTENDED | | | | |
Changes in Cycle 46r1 data
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Option 2 or 3 time-critical applications can be tested with theIFS Cycle 45r1 test data retrieved from MARS or received in Dissemination.
Further reading
- T. Haiden; M. Janousek; F. Vitart; L. Ferranti; F. Prates: "Evaluation of ECMWF forecasts, including the 2019 upgrade. Available at https://www.ecmwf.int/en/elibrary/19277-evaluation-ecmwf-forecasts-including-2019-upgrade
Peter Lean, Massimo Bonavita, Elías Hólm, Niels Bormann,Tony McNally: "Continuous data assimilation for the IFS" - ECMWF Newsletter 158. Available at https://www.ecmwf.int/en/newsletter/158/meteorology/continuous-data-assimilation-ifs
Simon Lang, Elías Hólm, Massimo Bonavita, Yannick Trémolet (JCSDA, US): "A 50-member Ensemble of Data Assimilations" - ECMWF Newsletter 158. Available at https://www.ecmwf.int/en/newsletter/158/meteorology/50-member-ensemble-data-assimilations
- ECMWF 's website news item: "Upgrade to boost quality of ocean wave forecasts". Available at https://www.ecmwf.int/en/about/media-centre/news/2019/upgrade-boost-quality-ocean-wave-forecasts
- Frédéric Vitart, Gianpaolo Balsamo, Jean-Raymond Bidlot, Simon Lang, Ivan Tsonevsky, David Richardson, Magdalena Alonso-Balmaseda: "Use of ERA5 to Initialize Ensemble Re-forecasts" - ECMWF Technical Memorandum nr. 841. Available at https://www.ecmwf.int/en/elibrary/18872-use-era5-initialize-ensemble-re-forecasts
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