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There is an application on the Climate Data Store (CDS) which allows users to compute and download selected daily statistics of variables from a number of hourly ERA5 datasets: Daily statistics calculated from ERA5 data It provides users with a simple tool to obtain ERA5 data aggregated at daily frequency without having to download the original sub-daily resolution data. The ERA5 data is subset to the selected rectangular spatial region of interest and sampled at the selected frequency. Time coordinates can optionally be shifted to a selected time zone. The data is then aggregated to a daily frequency using the selected statistic and returned to the user in a single netCDF file. It is possible also to use the CDS API to request daily data from the CDS ERA5 daily application as described on this user forum post: https://confluence.ecmwf.int/x/BD6kDQ |
This knowledge base article shows you how to calculate daily total precipitation using ERA5 data.
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