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NOAA-EMC / graphcast

GraphCastGFS
https://graphcastgfs.readthedocs.io/en/latest/index.html
Apache License 2.0
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GDAS grib2 files don't have 125, 175, 225, 775, 825, 875 pressure levels which are needed for the current graphcast model #21

Closed SadeghTabas-NOAA closed 4 months ago

SadeghTabas-NOAA commented 5 months ago

The GDAS grib2 data does not account for a few levels (e.g., 125, 175, 225, 775, 825, 875) that are needed for the current graphcast pre-trained model. As we have these levels in the master file from post processing in Gaussian grid, the gdas_utility.py for 37 PL, needs to be updated in a way that, it gets the data for those levels in the Gaussian grid and interpolates them to latlon grid to be used for graphcast 37 PL inputs (wgrib2 is a potential tool for this task).

LinlinCui-NOAA commented 5 months ago

@SadeghTabas-NOAA Does vertical interpolation work for this purpose?

SadeghTabas-NOAA commented 5 months ago

@SadeghTabas-NOAA Does vertical interpolation work for this purpose?

we have these pressure levels in the master file, we just did not export them to the grib2 files, we will talk about this on Monday.

junwang-noaa commented 5 months ago

@SadeghTabas-NOAA @LinlinCui-NOAA There are two gdas grib files:

gdas.t00z.pgrb2.0p25.f000 gdas.t00z.pgrb2b.0p25.f000

The model fields on those pressure levels listed in the issue are in gdas.t00z.pgrb2b.0p25.f000. Please let me know if there is any missing field. Thanks

SadeghTabas-NOAA commented 5 months ago

@SadeghTabas-NOAA @LinlinCui-NOAA There are two gdas grib files:

gdas.t00z.pgrb2.0p25.f000 gdas.t00z.pgrb2b.0p25.f000

The model fields on those pressure levels listed in the issue are in gdas.t00z.pgrb2b.0p25.f000. Please let me know if there is any missing field. Thanks

Thank you so much @junwang-noaa for this. we will work on it.

SadeghTabas-NOAA commented 5 months ago

@junwang-noaa I dont see gdas.t00z.pgrb2b.0p25.f000 on s3 or NOMADS. Could you please double check? Thanks