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ERA5 ensemble: InputData for ungrib

Jiwon Lee

New member
Hi

I want to use ERA5 ensemble members for I.C and B.C.

I downloaded surface and pressure data from "Copernicus Climate Data Store |,"
but there are 10 ensemble members in a single file.
I tried using "cdo splitsel,1 ERA5-pl_membsers-20210831-20210831.grib ERA5-pl_membsers-20210831-20210831_" to create separate files for each member,
but I failed to split the files into individual members, and ungrib.exe does not run.

What method should I use to perform ungrib using ERA5 ensemble members?

ERA5 ensemble member data is stored here.

Please help me."
 
Unfortunately We don't have many experiences splitting GRIB file using CDO.
If you are familiar with NCL or Python, probably you can read the data first, then write the data to intermediate format that can be processed by metgrid. In this way you can skip running ungrib.
 
Dear Jiwon Lee,

I have the same problem, how do you solve it?

regards

Daniel



Hi

I want to use ERA5 ensemble members for I.C and B.C.

I downloaded surface and pressure data from "Copernicus Climate Data Store |,"
but there are 10 ensemble members in a single file.
I tried using "cdo splitsel,1 ERA5-pl_membsers-20210831-20210831.grib ERA5-pl_membsers-20210831-20210831_" to create separate files for each member,
but I failed to split the files into individual members, and ungrib.exe does not run.

What method should I use to perform ungrib using ERA5 ensemble members?

ERA5 ensemble member data is stored here.

Please help me."
 
Dear Jiwon Lee,

I have a similar problem. I tried to download a ensemble of 10 members in NetCDF format from the cdo and convert it to grib format with the "cdo-f grb copy ndfile gribfile" command, but again I ran into problems. My problem is that in met_em, TT, UU, VV and other variables are all 0 in the three-dimensional space. So I want to take other measures to deal with this problem. Has the problem been solved?

Thank you!
 
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