No Vtable for 20CR Version 3 Data

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Marcelo
Posts: 1
Joined: Wed Jul 24, 2019 8:27 am

No Vtable for 20CR Version 3 Data

Post by Marcelo » Wed Jul 24, 2019 8:55 am

I'm working with 20CR version 3 reanalysis (not released yet) in grib2 format. g2print utility program is able to read the files and helped creating a new Vtable that can be read by ungrib and I get the "successful completion of ungrib" message. The problem is that the intermediate files are empty. I'm guessing there is a problem with my grib2 files since the log file shows:

Code: Select all

2019-07-24 10:38:59.512 --- INFORM: Reading Grib Edition 2
2019-07-24 10:38:59.513 --- unknown model from NCEP 195
2019-07-24 10:38:59.520 --- Inventory for date = 1816-07-01 00:00:00
2019-07-24 10:38:59.520 ---      PRES        TT        UU        VV  SPECHUMD       HGT        RH      PSFC      PMSL  SM000010  SM010040  SM040100  SM100200  ST000010  ST010040  ST040100  ST100200    SEAICE   LANDSEA   SOILHGT  SKINTEMP      SNOW 
2019-07-24 10:38:59.520 --- -------------------------------------------------
2019-07-24 10:38:59.520 --- -------------------------------------------------
2019-07-24 10:38:59.569 --- unknown model from NCEP 195
Does anybody encountered similar problems? I'm attaching the files I'm using, my wrf version is the 3.9.1.1 with intel compilers.

Best regards,

Marcelo
Attachments
pgrbensmeananl_1816070100.grb2.zip
(12.51 MiB) Downloaded 31 times
namelist.wps
(910 Bytes) Downloaded 34 times
Vtable.20cr.txt
(3.25 KiB) Downloaded 41 times

kwerner
Posts: 2287
Joined: Wed Feb 14, 2018 9:21 pm

Re: ungrib creates empty intermediate files

Post by kwerner » Tue Jul 30, 2019 9:21 pm

Hi,
Are you using the original grib2 input file you downloaded (or obtained), or did you make modifications to that file? I'm not familiar with 20CR data, but it's interesting that your file happens to use most of the same grib code values as GFS. Is this a type of GFS product?
NCAR/MMM

yanglong09
Posts: 3
Joined: Fri Jan 29, 2021 12:36 pm

Re: ungrib creates empty intermediate files

Post by yanglong09 » Fri Jan 29, 2021 12:38 pm

I ran into the same problem. Did you solve it?

yanglong09
Posts: 3
Joined: Fri Jan 29, 2021 12:36 pm

Re: ungrib creates empty intermediate files

Post by yanglong09 » Fri Jan 29, 2021 12:46 pm

Hi, I did not modify anything.
You are right. The GFS Vtable works for 20CR version 2 and version 2c, but not for 20CR version 3.

kwerner
Posts: 2287
Joined: Wed Feb 14, 2018 9:21 pm

Re: ungrib creates empty intermediate files

Post by kwerner » Mon Feb 01, 2021 11:54 pm

Hi,
If we do not have a Vtable that is written for a specific type of data, you may need to contact someone who supports/manages the data to see if you can obtain the grib codes for it. Then you will be able to modify one of the existing vtables for your purpose. If you do find one that works, please share it here so that it can help other users who may be using this type of data.
NCAR/MMM

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