Comments (10)
Hi Vinni,
It looks like you are using the GLDAS forcing. Please note that the GLDAS forcing data switched from grib to netcdf format two years ago. For this change, now there is a separate script, create_UV_netcdf.perl, to deal with the wind component. Can you try this Perl script and see if it works?
The details about pre-processing GLDAS in netcdf format are documented in this file:
https://github.com/NCAR/hrldas/blob/master/hrldas/docs/README.GLDAS
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Here are the last few lines of error:
flnm = geo_em.d01.nc
Done with subroutine read_geo_em_file
Date = 2018-01-03_00 ihour = 0
: Checking for file '/media/user/Elements/GLDAS_data/2018/noahmp_extracted/Tair/GLDAS_Tair_f_inst_2018010300'
: Found file /media/user/Elements/GLDAS_data/2018/noahmp_extracted/Tair/GLDAS_Tair_f_inst_2018010300
Succesfully read the file:
/media/user/Elements/GLDAS_data/2018/noahmp_extracted/Tair/GLDAS_Tair_f_inst_20
18010300
Can't read variable:
Tair_f_inst
Returning error flag from get_single_datastruct_from_netcdf (1)
flnm =
/media/user/Elements/GLDAS_data/2018/noahmp_extracted/Tair/GLDAS_Tair_f_inst_20
18010300
ierr = -57
Field label= T2D
No previous data.
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Hi Vinni,
This error message basically means that the code had an error when reading the variable in the netcdf file, so it returned an ierr /= 0.
Can you check that all variables are extracted properly from GLDAS in the previous steps? Also, you can attach the files and the namelist to this issue. See if I can help you with this.
Regards,
Zhe
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Dear Zhezhang, Thanks for the help.
I am hereby enclosing the following docs:
- GLDAS sample files after using all the new perl scripts for netcdf processing.
- Namelist file along with geo_em.d01 file for my domain. Also, i have attached a small test fortran file to check whether the variable is being read properly (named test_nc.F : compiled and linked with netcdf 4.8.x version). Its reading properly here but not in the create_forcing_netcdf.F file.
GLDAS_sample_data.zip
namelist_geo_em.zip
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PS: Should global GLDAS need to be downloaded for forcing? I have used subsetted GLDAS data only for my region.
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Hi Vinni,
This is the case - the read_netcdf_unit subroutine in the create_forcing_netcdf.F code requires exactly the same dimension (600x1440) for global coverage.
Please try with the global data and see if it works.
Zhe
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That's great. Thank you Zhe. 😄
I will try doing the same with global data.
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Dear CharlesZheZhang,
Thanks for your help so far. I was able to run HRLDAS successfully after I downloaded the global GLDAS files. I have a small query regarding the HRLDAS name list. I can see that there is a variable name SPINUP_LOOPS in the namelist of hrldas, which I guess, is used for model spinup. SPINUP_LOOPS has units as hours/days.
- Let's say I want to coldstart/spinup my model for 2 years * 20 times. What value of SPINUP_LOOPS should I give?
After spinup, should I use the last restart file generated for my analysis runs? - When I tested spinup for lets stay 16 days. the model is running each day 30 times. how can I achieve what I mentioned in question 1.?
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Hi Vinni, to answer your questions:
- set SPINUP_LOOPS=20 and KDAYS=730 (i.e., 365*2 if no leap year). After spinup, you need to use the latest restart file generated (you can check the time of each restart file generated and use the most recent one generated).
- The spinup capability is to repeat the run for the "KDAYS" you specified. So if you want to run each day 30 times, then you need to set SPINUP_LOOPS=30 and KDAYS=1 for spinup.
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