ESMValGroup / ESMValTool

ESMValTool: A community diagnostic and performance metrics tool for routine evaluation of Earth system models in CMIP
https://www.esmvaltool.org
Apache License 2.0
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Adapt ERA5 cmoriser for new CDS API format #3790

Open alistairsellar opened 1 month ago

alistairsellar commented 1 month ago

Is your feature request related to a problem? Please describe. ECMWF have updated the grib-to-netCDF converter used in downloading the netCDF version of ERA5 (and presumably also for ERA-Interim): https://confluence.ecmwf.int/display/CKB/GRIB+to+netCDF+conversion+on+new+CDS+and+ADS+systems. This has changed the format of the ERA5 files, and the ESMValTool ERA5 on-the-fly cmoriser might need to be updated to work with the new format. I say might because there are a couple of problems with the format that I've requested be fixed at source:

In the meantime, here is some guidance to ESMValTool users downloading ERA5 data:

@ESMValGroup/obs-maintainers, where do you think would be the appropriate places to document the above interim advice? Is an issue the best place for advice that might evolve quite quickly?

Would you be able to help out? Yes

bettina-gier commented 4 weeks ago

This also relates to #3750.

I would personally wait a little before adapting to the new CDS since there are still a few things that might change. We could potentially look into pinning one of these issues so it doesn't get drowned in between other things. That might also remind us to keep it more up-to-date.