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The planned timetable for the implementation of the cycle 50R1 is as follows:
| Date | Event |
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| late April 2025 | Implementation |
The timetable represents current expectations and may change in light of actual progress made.
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- Update of heterogeneous chemistry parameterization
- Revision of SO2 + H2O2 aqueous phase reaction
Impact of the new cycle
Technical details of the new cycle
New parameters
| paramId | shortName | name | units | GRIB edition | Components |
|---|---|---|---|---|---|
Model & Pressure levels | |||||
| 216013 | MolBSC355 | Molecular backscatter coefficient at 355 nm | m-1 sr-1 | 2 | CAMS Aerosol Model |
| 216014 | MolBSC532 | Molecular backscatter coefficient at 532 nm | m-1 sr-1 | 2 | CAMS Aerosol Model |
| 216015 | MolBSC1064 | Molecular backscatter coefficient at 1064 nm | m-1 sr-1 | 2 | CAMS Aerosol Model |
| 216023 | MolBSC910 | Molecular backscatter coefficient at 910 nm | m-1 sr-1 | 2 | CAMS Aerosol Model |
| 216016 | AerBSC355 | Aerosol backscatter coefficient at 355 nm | m-1 sr-1 | 2 | CAMS Aerosol Model |
| 216017 | AerBSC532 | Aerosol backscatter coefficient at 355 nm | m-1 sr-1 | 2 | CAMS Aerosol Model |
| 216018 | AerBSC1064 | Aerosol backscatter coefficient at 355 nm | m-1 sr-1 | 2 | CAMS Aerosol Model |
| 216024 | AerBSC910 | Aerosol backscatter coefficient at 355 nm | m-1 sr-1 | 2 | CAMS Aerosol Model |
| 216025 | Aerext340 | Aerosol extinction coefficient at 340 nm | m^-1 | 2 | CAMS Aerosol Model |
| 216026 | Aerext440 | Aerosol extinction coefficient at 440 nm | m^-1 | 2 | CAMS Aerosol Model |
| 216027 | Aerext800 | Aerosol extinction coefficient at 800 nm | m^-1 | 2 | CAMS Aerosol Model |
| 216019 | Aerext910 | Aerosol extinction coefficient at 910 nm | m^-1 | 2 | CAMS Aerosol Model |
| 216020 | SSA910 | Single Scattering Albedo at 910 | |||
| nm |
| 2 | CAMS Aerosol Model | ||||
| 216022 | Aerbcksctgnd910 | Aerosol backscatter coefficient at 910 nm as seen from the ground | m-1 sr-1 | 2 | CAMS Aerosol Model |
| 216021 | Aerbckscttoa910 | Aerosol backscatter coefficient at 910 nm as seen from TOA | m-1 sr-1 | 2 | CAMS Aerosol Model |
Surface level | |||||
216033 | trco3 | Tropospheric column vertically-integrated mass density of ozone | kg m-2 | 2 | CAMS Chemical Model |
216034 | trcco | Tropospheric column vertically-integrated mass density of carbon monoxide | kg m-2 | 2 | CAMS Chemical Model |
216035 | trcno2 | Tropospheric column vertically-integrated mass density of nitrogen dioxide | kg m-2 | 2 | CAMS Chemical Model |
| Note |
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Please note: 3 hourly analysis fields now availableWith the implementation of the IFS Cycle 50r1 analysis fields will be available every 3 hours, at times 0 UTC, 3 UTC ... 18 UTC and 21 UTC. |
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Please note: Hourly forecast fields now availableWith the implementation of the IFS Cycle 50r1 model level and presure level forecast fields will be available every hourly step at 0, 1, 2 ... 119 and 120. |
Change to GRIB encoding
The GRIB model identifiers (generating process identification number) for cycle 50r1 will be changed as follows:
GRIB 1 Section 1 Octets | GRIB 2 Section 4 Octets | ecCodes key | Component | Model identifier | |
|---|---|---|---|---|---|
49r1 | 50r1 | ||||
6 | 14 | generatingProcessIdentifier | Atmospheric model | 158 | 161 |
6 | 14 | generatingProcessIdentifier | Ocean wave model | 106 | 109 |
6 | 14 | generatingProcessIdentifier | soil moisture model | 146 | 146 |
For all parameters in GRIB 2 the Master Tables Version Number will be changed as follows:
GRIB 2 Section 1 Octets | ecCodes key | Master Tables Version Number | |
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49r1 | 50r1 | ||
10 | tablesVersion | 33 | 35 |
Software
To handle the data of Cycle 50r1 we recommend to use the ECMWF software packages
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The CAMS operational ECMWF data portal (aux.ecmwf.int; SFTP/FTP/HTTPS data access) will serve the most recent 3 days of test data, once the e-suite is running in near-real-time, in the directories "/DATA/CAMS_GLOBAL_TEST" and "/DATA/CAMS_EUROPE_BC_TEST" for global and regional boundary condition data, respectively. In addition, surface level fields (model level 137) will be provided as individual files in the "/DATA/CAMS_GLOBAL_ADDITIONAL_TEST" directory. Users wanting to access the output from the current test system for a longer period can access the data from 05-2025 <> onwards directly on MARS or through the Atmosphere Data Store. More details can be found here: Accessing CAMS 50r1 test data. |
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This document has been produced in the context of theCopernicus Atmosphere Monitoring Service (CAMS). The activities leading to these results have been contracted by the European Centre for Medium-Range Weather Forecasts, operator of CAMS on behalf of the European Union (Delegation Agreement signed on 11/11/2014 and Contribution Agreement signed on 22/07/2021). All information in this document is provided "as is" and no guarantee or warranty is given that the information is fit for any particular purpose. The users thereof use the information at their sole risk and liability. For the avoidance of all doubt , the European Commission and the European Centre for Medium - Range Weather Forecasts have no liability in respect of this document, which is merely representing the author's view. |
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