Snowfall variable available on "ERA5 hourly data on single levels from 1940 to present" but not on "Complete ERA5 global atmospheric reanalysis"?

AIFS, IFS and OpenIFS AIFS
,
1

Hello,

I trying to learn how to use anemoi by trying to retraining AIFS 1.10 with the procedure noted in the huggingface notebook.

To do that, I am trying to download with (anemoi-datasets or the CDS API) the relevant variables on the n320 grid from the “Complete ERA5 global atmospheric reanalysis”. There is 4 variables I need that are not found on this dataset:

  • snowfall (sf)
  • runoff (ro)
  • surface_solar_radiation_downwards (ssrd)
  • surface_thermal_radiation_downwards (strd)

But those variables are available on the “ERA5 hourly data on single levels from 1940 to present” of the CDS.

Is it normal ?

Thanks your help !

2

Hi Soulivanh_Thao,

Try requesting these variables via the following block in input.join along with other requests (e.g., for pressure and other surface variables):

 - accumulations:
      use_cdsapi_dataset: "reanalysis-era5-complete"
      class: ea
      type: an
      stream: oper
      expver: '0001'
      grid: N320
      levtype: sfc
      param:
      - sf
      - ro
      - strd
      - ssrd
      step: 6

Possibly your error had to do with the accumulations flag.

Best,

Julian

3

Thanks, it worked! Indeed, I did not put sf, ro, strd, ssrd under the accumulations flag.