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Fields are in monthly files with one variable per file. Files are compressed with a deflate level of 6 and chunked to the grid dimension. Please note that as 26-01-08 September 2022 all months up to 202112 202207 are the final version of ERA5. The month of 202201 202208 was also downloaded, but is from the temporary version of ERA5 and will be replaced in the near future.
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