A bug in WPS-V4.5 about ICON-Global data processing

[haiqingsong]

Hello， WPS development team, @weiwangncar @grafmi @WQadam
There is a bug in WPS-V4.5 about ICON-Global data processing when the ICON-Global data was ungrib.
Although the ICON product specification（https://www.dwd.de/DWD/forschung/nwv/fepub/icon_database_main.pdf） states that ICON-global soil moisture is measured in kg/m2 and that the range of values for soil moisture is 0-1. In WPS/ungrib/SRC/RRPR. F, this soil moisture (kg/m2) is converted to soil volumetric water content (m3/m3) , which results in wrong met output in WPS:met_em.d01.*.nc. The soil moisture in the NC file is between 0，0.05, which is too dry to be practical, and I think it's wrong. The spatial distribution and numerical range of soil moisture in the original ICON-Global data are consistent with the actual soil moisture (see the attached figure) , so I think the unit of soil moisture data in ICON-Global is m3/m3, not kg/m2 as indicated in the specification（https://www.dwd.de/DWD/forschung/nwv/fepub/icon_database_main.pdf）.
I tried to modify the code: WPS/ungrib/SRC/RRPR. F soil moisture conversion fragment, the results are right.

 

[haiqingsong]

The problem was resolved！

 

[kwerner]

Thanks for letting us know the issue was resolved. Is there any useful information you can provide in case a user experiences this issue in the future? Thanks!

 

[haiqingsong]

Thanks for letting us know the issue was resolved. Is there any useful information you can provide in case a user experiences this issue in the future? Thanks!

It's my fault, I didn't realize I had converted the ICON soil moisture into M3/m3. WPS-V4.5 is no problem, thank you for your reply. Now I'm downloading ICON-Global and working with WPS, and the result is right. Thanks Again!

 

[kwerner]

That's great to hear! Thanks for the update.

 

[pseo_lml]

The problem was resolved！

Hello! I am trying to use WPS for the ICON-Glabal data pre-precessing. However, an error occurs which is as follows. Could you share some useful information about the error? Thank you so much!
*** Starting program ungrib.exe ***
Start_date = 2023-06-28_06:00:00 , End_date = 2023-06-30_06:00:00
output format is WPS
Path to intermediate files is ./
GRIB2 Unknown Projection: 101
ungrib understands projections 0, 20, 30, and 40
STOP Stop in rd_grib2

"

 

[haiqingsong]

Hello! I am trying to use WPS for the ICON-Glabal data pre-precessing. However, an error occurs which is as follows. Could you share some useful information about the error? Thank you so much!
*** Starting program ungrib.exe ***
Start_date = 2023-06-28_06:00:00 , End_date = 2023-06-30_06:00:00
output format is WPS
Path to intermediate files is ./
GRIB2 Unknown Projection: 101
ungrib understands projections 0, 20, 30, and 40
STOP Stop in rd_grib2

"

Where did you download this data from? It is formatted as GRIB1 or GRIB2

 

[pseo_lml]

Where did you download this data from? It is formatted as GRIB1 or GRIB2

from Index of /weather/nwp/icon/grib/

 

[kwerner]

@pseo_lml
Since your issue is not the same as the original one posted here (and in the title), will you please post this as a new forum thread? This helps with searchability and readability for other users in the future when looking through the threads. Thanks!