Will the WAVE resolution be automatically increased to match the atmospheric model?
Question 1?
Answer oneIn dissemination users will need to adjust their requirements or notify Data Support team via the Support Portal. If in MARS the resolution is not explicitly specified for 49r1 data, users will automatically get the higher resolution.
Panel
titleColor
#ffffff
titleBGColor
#00A4C4
title
New and changed parameters
Expand
title
Is MUCAPE/MUCIN just a different name for the same physical parameter, or is the physics behind it also different?
Question 1
Answer 1CAPE and MUCAPE are different, but related parameters (as are CIN and MUCIN). Read more about differences between CAPE and MUCAPE, and CIN and MUCIN in our Forecast User Guide. See also 47r3 new parameters: CAPE and CIN.
Expand
title
Will the EFI/SOT for CAPE start using MUCAPE instead of CAPE? Or will they continue to be based on CAPE?
Question2
Answer 2The EFI/SOT will start using MUCAPE. CAPE will be completely stopped in production.
Panel
titleColor
#ffffff
titleBGColor
#00A4C4
title
Misc
Expand
title
Will ECMWF AIFS parameters also be changing with the cycle change?
In line with the expected changes for 2026, could we replace the historical ENS control data with OPER stream, allowing us to begin retraining models that are prepared?
We would encourage this, yes. In the IFS Cycle 49r1, (ex) HRES and Ensemble Control are numerically identical. If the users make this change at IFS Cycle 49r1, then they won't need to make it at IFS Cycle 50r1.
Expand
title
Are users able to acquire all CTRL (ex HRES) and ENS data in GRIB2 format?
In IFS Cycle 50r1 it will still be a blend of GRIB1 and GRIB2. Full migration to all GRIB2 will happen with IFS Cycle 50r2, planned for implementation in late 2026, with plenty of test data available during the year or so leading up to this. Read more in this article from Spring 2023 Newsletter and In Focus article: Migration to GRIB2 data format: implications for users.
Expand
title
Is there any developmental plans for new cycles of IFS in terms of new data formats like zarr instead of GRIB2? Should we expect any approach regarding these changes near future?
We are not planning to replace GRIB2 in the near future.
Expand
title
I am a user that hasn't upgraded to CCSDS compression. Will I be forced to migrate with the IFS Cycle 49r1?
No, we will not be forcing users to migrate to the CCSDS compression with the IFS Cycle 50r1 update. However, we strongly recommend testing and switching to the CCSDS compression.