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Some ERA5 datasets do not appear in CDS, but they are accessible through CDS API, for example, ERA5 model level data archived at ECMWF's MARS archive. This implies, in some situations, accessing data not available on disks but archived in the tape library.
Please be aware that there is an additional queueing system for downloading data from the ECMWF's MARS archive - expect several hours to several days for submitted requests to complete at this time. You can check the Live status of your request You will have to use ECMWF MARS keywords in the CDS API request AND follow the MARS efficiency rules to avoid disappointment with your data retrieval! You must also retrieve dataset 'reanalysis-era5-complete'.
We provide some examples of retrieval scripts but of course a wide range of scripts can be built. Under any circumstances, to make sure you are using the correct MARS keywords and values, we ask you to proceed as follows:
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