Download daily accumulated variables in ERA5-Land over full years

Hi,

I am trying to download daily accumulation data for precipitation and evaporation from ERA5-Land, for a full year. According to the dataset documentation, the daily value of accumulated variables is found in the 00:00 time step the of the following day in ERA5-Land hourly data.

With the current setup of both the API and the download interface, this would mean that downloading one full year of daily accumulations requires splitting the request into two parts and afterwards merging the resulting files.

  • First part: All 00:00 UTC time steps from Jan 2 to Dec 31
  • Second part: The 00:00 UTC time step of Jan 1 of the following year.

Is there any way to circumvent this issue? If not, then I would propose (any of) the following possible additions to the API and download interface:

  • Allowing 24:00 as time value
  • An optional time offset parameter that would allow shifting the specified time steps by a certain number of hours/days
  • More generic: Allowing the API request to include a list of time stamps instead of providing separate lists for year, month, day, and time parameters.

Any information regarding this would be highly appreciated.

Many thanks in advance and best regards!