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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 1808-0809-2021 all months up to 202105 202106 are the final version of ERA5. The months of 202106202107, 202107 202108 and 202108 202109 were also downloaded, but they are from the temporary version of ERA5 and will be replaced in the near future.
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