Preprocessing Using ERA5 Data

[uharis1]

When I am running the ungrib command after linking the Vtable using ERA5 data. the following error appears
gribsize in gribcode
*** Starting program ungrib.exe ***
Start_date = 2024-06-27_00:00:00 , End_date = 2024-06-28_00:00:00
output format is WPS
Path to intermediate files is ./
*** stopping in gribcode ***\n
\tI was expecting a Grib1 file, but this is a Grib2 file.
\tIt is possible this is because your GRIBFILE.XXX files
\tare not all of the same type.
\tWPS can handle both file types, but a separate ungrib
\tjob must be run for each Grib type.\n


Could someone explain me how to solve the error. Also in the ungrib.log file it says

2024-10-21 16:38:32.001 --- *** Starting program ungrib.exe ***
2024-10-21 16:38:32.005 --- Start_date = 2024-06-27_00:00:00 , End_date = 2024-06-28_00:00:00
2024-10-21 16:38:32.005 --- &UNGRIB
2024-10-21 16:38:32.005 --- out_format = WPS
2024-10-21 16:38:32.005 --- ordered_by_date = TRUE
2024-10-21 16:38:32.005 --- prefix = FILE
2024-10-21 16:38:32.005 --- /
2024-10-21 16:38:32.005 --- output format is WPS
2024-10-21 16:38:32.005 --- INFORM: Interval value: 10800 seconds or 3.000000 hours
2024-10-21 16:38:32.005 --- Path to intermediate files is ./
2024-10-21 16:38:32.008 --- INFORM: Reading Grib Edition 1

Usually the when we build WRF with GRIB2 option it should run isn't it. May i know where am I doing wrong.

Thanks

 

[William.Hatheway]

which vtable are you linking?
did you download a subset of the ERA5 data?
Where did you download the ERA5 data from?

 

[uharis1]

I am using Vtable.ERA-interim.pl. I downloaded the data from Climate Data store

 

[William.Hatheway]

How to Process ERA5 Data

ERA5 data is in the format of each variable per file, which is different from other traditional input data sources. However, processing it through ungrib isn't that much different. You will simply link all files - both upper air and surface data - into your working directory and ungrib will be...

forum.mmm.ucar.edu

Using Newer ECMWF Data

The new EC grib2 data requires an additional step to convert from EC grib2 data to grib2 data WPS supports. The conversion can be done by using the convert command in the ecCodes library which is available from ECMWF. The conversion step follows the following format: grib_set -r -w...

forum.mmm.ucar.edu

How to use ERA5 Data From Copernicus Database

**Guide to Using Copernicus ERA5 Data with WRF** Dear WRF Users, Many users encounter challenges when utilizing ERA5 data from the Copernicus Climate Data Store (CDS) with WRF. To assist, I've put together a step-by-step guide on how to successfully download, process, and run ERA5 data within...

forum.mmm.ucar.edu

hopefully one of these posts will help you

 

[Ming Chen]

Where did you download your ERA5 data? It seems that your data includes both GRIB1 and GRIB2 records. If this is the case, then WPS cannot process data files that contain records in different GRIB format.

if possible, please download ERA5 data from the website here, then try again.

 

[uharis1]

Thanks a lot. If I am using processed data of ERA5 produced by NCAR which Vtable should I use ?

 

[William.Hatheway]

Thanks a lot. If I am using processed data of ERA5 produced by NCAR which Vtable should I use ?

WPS/ungrib/Variable_Tables/Vtable.ECMWF at master · hanschen/WPS

WRF Pre-Processing System Version 3.6.1. Contribute to hanschen/WPS development by creating an account on GitHub.

github.com

I believe this one

 

[uharis1]

Thankyou very much

 

[Ming Chen]

Thanks a lot. If I am using processed data of ERA5 produced by NCAR which Vtable should I use ?

Please use Vtable.ECMWF

 

[uharis1]

Start_date = 2024-06-25_00:00:00 , End_date = 2024-06-26_00:00:00
2024-10-29 10:49:10.489 --- &UNGRIB
2024-10-29 10:49:10.489 --- out_format = WPS
2024-10-29 10:49:10.489 --- ordered_by_date = TRUE
2024-10-29 10:49:10.489 --- prefix = SFC
2024-10-29 10:49:10.489 --- /
2024-10-29 10:49:10.489 --- output format is WPS
2024-10-29 10:49:10.489 --- INFORM: Interval value: 10800 seconds or 3.000000 hours
2024-10-29 10:49:10.490 --- Path to intermediate files is ./
2024-10-29 10:49:10.493 --- ERROR: Grib2 file or date problem, stopping in edition_num


Can someone help resolve this error. I have downloaded data from NCAR from
Start date: 2024-06-25 00:00
- End date: 2024-07-12 23:00. when I am running ungrib the above error arises.

Thanks!

 

[Ming Chen]

Start_date = 2024-06-25_00:00:00 , End_date = 2024-06-26_00:00:00
2024-10-29 10:49:10.489 --- &UNGRIB
2024-10-29 10:49:10.489 --- out_format = WPS
2024-10-29 10:49:10.489 --- ordered_by_date = TRUE
2024-10-29 10:49:10.489 --- prefix = SFC
2024-10-29 10:49:10.489 --- /
2024-10-29 10:49:10.489 --- output format is WPS
2024-10-29 10:49:10.489 --- INFORM: Interval value: 10800 seconds or 3.000000 hours
2024-10-29 10:49:10.490 --- Path to intermediate files is ./
2024-10-29 10:49:10.493 --- ERROR: Grib2 file or date problem, stopping in edition_num


Can someone help resolve this error. I have downloaded data from NCAR from
Start date: 2024-06-25 00:00
- End date: 2024-07-12 23:00. when I am running ungrib the above error arises.

Thanks!

Please clarify what data you download, so that we can get the same data and repeat your case.