Copernicus Service catalogue

This application allows users to compute and download selected daily statistics of variables from a number of hourly ERA5 datasets.

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.

User-selectable parameters

• Dataset: the ERA5 dataset to which the variable to be processed belongs.
• Product type: the type of the data product to be processed, as defined in the original dataset download form.
• Variable: the variable to be processed.
• Pressure level: the pressure level of the variable to be processed, if applicable.
• Statistic: the statistic to use for the daily aggregations of the original data.
• Year: the year of the data to be processed, ranging from 1979 to the last available year.
• Month: the month of the data to be processed, up to the last available complete month.
• Time zone: The time-shift to apply prior to sampling and calculating the daily statistics. The daily aggregation is always calculated over the 24 hours starting from 00:00:00 in the selected time zone.
• Frequency: The frequency to sample the source data prior to calculating the daily statistics. The first selected time step of each day is always 00:00:00 in the selected timezone.
• Grid: longitude/latitude grid resolution of the input (and output) data.
• Geographical area: bounds of the rectangular area of the data to be processed.