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Table of Contents
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The planned timetable for the implementation of the cycle 50R1 is as follows:

DateEvent
late April 2025Implementation


The timetable represents current expectations and may change in light of actual progress made.

...

  • 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

paramIdshortNamenameunitsGRIB editionComponents

Model  & Pressure levels

216013MolBSC355Molecular backscatter coefficient at 355 nmm-1 sr-12CAMS Aerosol Model
216014MolBSC532Molecular backscatter coefficient at 532 nmm-1 sr-12CAMS Aerosol Model
216015MolBSC1064Molecular backscatter coefficient at 1064 nmm-1 sr-12CAMS Aerosol Model
216023MolBSC910Molecular backscatter coefficient at 910 nmm-1 sr-12CAMS Aerosol Model
216016AerBSC355Aerosol backscatter coefficient at 355 nmm-1 sr-12CAMS Aerosol Model
216017AerBSC532Aerosol backscatter coefficient at 355 nmm-1 sr-12CAMS Aerosol Model
216018AerBSC1064Aerosol backscatter coefficient at 355 nmm-1 sr-12CAMS Aerosol Model
216024AerBSC910Aerosol backscatter coefficient at 355 nmm-1 sr-12CAMS Aerosol Model
216025Aerext340Aerosol extinction coefficient at 340 nmm^-12CAMS Aerosol Model
216026Aerext440Aerosol extinction coefficient at 440 nmm^-12CAMS Aerosol Model
216027Aerext800Aerosol extinction coefficient at 800 nmm^-12CAMS Aerosol Model
216019Aerext910Aerosol extinction coefficient at 910 nmm^-12CAMS Aerosol Model
216020SSA910Single Scattering Albedo at 910
nm2CAMS Aerosol Model215186Aerbcksctgnd355Aerosol backscatter coefficient at 355 nm  as seen from the groundm-1 sr-12CAMS Aerosol Model215187Aerbcksctgnd532Aerosol backscatter coefficient at 532
nm
as seen from the groundm-1 sr-12CAMS Aerosol Model215188Aerbcksctgnd1064Aerosol backscatter coefficient at 1064 nm as seen from the ground
m-1 sr-1

2CAMS Aerosol Model
216022Aerbcksctgnd910Aerosol  backscatter coefficient at 910 nm as seen from the ground m-1 sr-12CAMS Aerosol Model
215183Aerbckscttoa355215184Aerbckscttoa532Aerosol backscatter coefficient at 532 nm as seen from TOAm-1 sr-12CAMS Aerosol Model215185Aerbckscttoa1064Aerosol backscatter coefficient at 1064 nm as seen from TOAm-1 sr-12CAMS Aerosol Model
Aerosol backscatter coefficient at 355 nm  as seen from Top Of Atmosphere (TOA)m-1 sr-12CAMS Aerosol Model
216021Aerbckscttoa910Aerosol  backscatter coefficient at 910 nm as seen from TOA m-1 sr-12CAMS 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

Please note: 3 hourly analysis fields now available

With 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.
(Previously, analysis fields were available only every 6 hours, at times 0 UTC, 6 UTC, 12 UTC and 18 UTC.) 

Note

Please note: Hourly forecast fields now available

With 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.
(Previously, only surface level forecast fields were available every hourly step).

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

49r1

50r1

 10 

tablesVersion

33

35

Software

To handle the data of Cycle 50r1 we recommend to use the ECMWF software packages 

...

Note
iconfalse

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.


Info
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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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