pmin variable in namelist.wps

Topics related to running the ungrib.exe program
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jfqbsm
Posts: 23
Joined: Sun Feb 16, 2020 12:20 pm

pmin variable in namelist.wps

Post by jfqbsm » Thu Apr 15, 2021 11:35 am

Hello,
After the new GFS V16 data, and according to your recommandation to set the pmin variable in the ungrib section of the namelist.wps in order to don't waste time processing all the extra levels stratosphere, i tried to use this variable. But i get the error in real.exe: mistmatch between num_metgrid_level and input file bottom-top_grid_dimension. Despite research on the web I did not find any documentation about pmin setting. What is the relationship between the pmin value in pa and the number of levels?
Thanks in advance for your help
Best regards
Jef

Ming Chen
Posts: 1456
Joined: Mon Apr 23, 2018 9:42 pm

Re: pmin variable in namelist.wps

Post by Ming Chen » Thu Apr 22, 2021 11:00 pm

Would you please send me your namelist.wps to take a look? Also, where did you download the GFS data? Thanks.
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jfqbsm
Posts: 23
Joined: Sun Feb 16, 2020 12:20 pm

Re: pmin variable in namelist.wps

Post by jfqbsm » Fri Apr 30, 2021 6:03 am

Hi,
Sorry for this late answer, i was unavailable for some times.
Finally i have solved my problem, i understood that wps provide a number of layers according the value of pmin variable which is the highest desired level expressed in pa. Then we have to set the new num_metgrid_level according the number of level provided by wps. I got the new num_metgrid_level with ncdump of met_em.d01.xxxx attribute BOTTOM-TOP_GRID_DIMENSION.
Best regards
Jef

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