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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 0809-0911-2021 all months up to 202106 202108 are the final version of ERA5. The months of 202107202109, 202108 202110 and 202109 202111 were also downloaded, but they are from the temporary version of ERA5 and will be replaced in the near future.
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