If a user runs exactly the same CDS API request several times, and the data from the first time the request is submitted is still in the CDS cache. then the same data are retrieved from the cache, rather than being re-extracted from the dataset.
For datasets which are updated on a daily basis (such as ERA5T), this can cause issues, as the later request may not be returned the data as expected.
To avoid this, we suggest users to add the keyword 'nocache' in their CDS API request, with a random string which is changed each time the request is submitted e.g.:
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Hope that helps!
Kevin
