[Wrf-users] WRF 3.2 Model not running after 4hrs of Integration.
Agnes Mika
agnes.mika at bmtargoss.com
Thu Mar 10 01:01:30 MST 2011
Hallo Geeta,
The "WOULD GO OFF TOP" messages mean vertical CFL criteria
violations. You do have to reduce your timestep further or decrease
your vertical level spacing. It can happen in (primarily) convective
situations that there are high vertical velocities and your timestep
is too large to be able to resolve those (hence the CFL error).
Where is your domain? If you are runnning the model for mountainous
regions these errors are even more likely to occur. In this case you
can also opt for smoothing your terrain data first so that you get
less steep slopes. For instance, when I did simulations for
Switzerland at 1 km resolution, without terrain smoothing, I had to
use a timestep of 1 second to avoid violations to the CFL criterium -
which makes the model very slooooooow...
In most cases you can re-set the timestep to a larger value after
after several hours (so to speed up your model run you could consider
writing restart files, running the first say 5 hours with your
original (120 sec) timestep, then running as long as needed with a
much shorter timestep, then the rest of the simulation again with a
larger timestep).
Hope this helps,
Agnes
Geeta Geeta wrote:
>
> Dear all,
> I was running the model on the IBM P570 machine with 3 nested domains, 27, 9 and 3 kms. This problem I had reported earlier as well. The time step I have used is 120sec. The model was running up to 6hrs and after which It aborted by giving Core file.
>
>
> I am attatching the namelist.input file and the rsl files.
>
> bash-3.2$ ls -lrt wrfout*
> -rw-r--r-- 1 51017984 Mar 08 03:06 wrfout_d01_2010-08-06_00:00:00
> -rw-r--r-- 1 176907272 Mar 08 03:06 wrfout_d02_2010-08-06_00:00:00
> -rw-r--r-- 1 252611432 Mar 08 03:06 wrfout_d03_2010-08-06_00:00:00
> bash-3.2$
> bash-3.2$ ncdump -v Times wrfout_d01_2010-08-06_00:00:00
> imes =
> "2010-08-06_00:00:00",
> "2010-08-06_01:00:00",
> "2010-08-06_02:00:00",
> "2010-08-06_03:00:00",
> "2010-08-06_04:00:00",
> "2010-08-06_05:00:00",
> "2010-08-06_06:00:00" ;
> }
> bash-3.2$
> AS SUGGESTED, I have tried to look for NaN in the wrfout files but It does not exist.!!!!!!
>
> bash-3.2$ ncdump wrfout_d01_2010-08-06_00:00:00 | grep -i NaN
> IVGTYP:description = "DOMINANT VEGETATION CATEGORY" ;
> ISLTYP:description = "DOMINANT SOIL CATEGORY" ;
> bash-3.2$ ncdump wrfout_d02_2010-08-06_00:00:00 | grep -i NaN
> IVGTYP:description = "DOMINANT VEGETATION CATEGORY" ;
> ISLTYP:description = "DOMINANT SOIL CATEGORY" ;
> bash-3.2$ ncdump wrfout_d03_2010-08-06_00:00:00 | grep -i NaN
> IVGTYP:description = "DOMINANT VEGETATION CATEGORY" ;
> ISLTYP:description = "DOMINANT SOIL CATEGORY" ;
> bash-3.2$
> bash-3.2$ date
> Tue Mar 8 03:29:15 IST 2011
> bash-3.2$
>
> bash-3.2$ ls -lrt core*
> coredir.5:
> total 655848
> -rw-r--r-- 1 335790224 Mar 08 03:07 core
>
> coredir.3:
> total 643664
> -rw-r--r-- 1 329553200 Mar 08 03:07 core
>
> coredir.2:
> total 646352
> -rw-r--r-- 1 330929600 Mar 08 03:07 core
>
> coredir.1:
> total 611240
> -rw-r--r-- 1 312953392 Mar 08 03:07 core
>
> coredir.7:
> total 606376
> -rw-r--r-- 1 310461104 Mar 08 03:07 core
>
> coredir.6:
> total 605224
> -rw-r--r-- 1 309871168 Mar 07 05:15 core
>
> coredir.4:
> total 658528
> -rw-r--r-- 1 337166176 Mar 08 03:07 core
>
> coredir.0:
> total 758952
> -rw-r--r-- 1 388580736 Mar 08 03:07 core
> bash-3.2$ ls -lrt core*
>
> I have used GREP in the rsl files
>
>
>
>
> ash-3.2$ grep -i NAN
> rsl.error.0000
>
> WOULD GO OFF TOP:
> KF_ETA_PARA I,J,DPTHMX,DPMIN 22 1 -NaNQ 5000.000000
>
> WOULD GO OFF TOP:
> KF_ETA_PARA I,J,DPTHMX,DPMIN 49 1 NaNQ 5000.000000
>
> bash-3.2$ grep -i NAN
> rsl.error.0001
>
> WOULD GO OFF TOP:
> KF_ETA_PARA I,J,DPTHMX,DPMIN 65 1 -NaNQ 5000.000000
>
> bash-3.2$ grep -i NAN
> rsl.error.0002
>
> WOULD GO OFF TOP:
> KF_ETA_PARA I,J,DPTHMX,DPMIN 1 32 -NaNQ 5000.000000
>
> bash-3.2$ grep -i NAN
> rsl.error.0003
>
> WOULD GO OFF TOP:
> KF_ETA_PARA I,J,DPTHMX,DPMIN 63 32 -NaNQ 5000.000000
>
> bash-3.2$ grep -i NAN
> rsl.error.0004
>
> WOULD GO OFF TOP:
> KF_ETA_PARA I,J,DPTHMX,DPMIN 1 63 -NaNQ 5000.000000
>
> bash-3.2$ grep -i NAN
> rsl.error.0005
>
> WOULD GO OFF TOP:
> KF_ETA_PARA I,J,DPTHMX,DPMIN 63 81 -NaNQ 5000.000000
>
> bash-3.2$ grep -i NAN
> rsl.error.0006
>
> WOULD GO OFF TOP:
> KF_ETA_PARA I,J,DPTHMX,DPMIN 2 94 NaNQ 5000.000000
>
> bash-3.2$ grep -i NAN
> rsl.error.0007
>
> WOULD GO OFF TOP:
> KF_ETA_PARA I,J,DPTHMX,DPMIN 63 94 -NaNQ 5000.000000
>
> bash-3.2$ grep -i NAN
> rsl.out.0000
>
> WOULD GO OFF TOP:
> KF_ETA_PARA I,J,DPTHMX,DPMIN 22 1 -NaNQ 5000.000000
>
> WOULD GO OFF TOP:
> KF_ETA_PARA I,J,DPTHMX,DPMIN 49 1 NaNQ 5000.000000
>
> bash-3.2$ grep -i NAN
> rsl.out.0001
>
> WOULD GO OFF TOP:
> KF_ETA_PARA I,J,DPTHMX,DPMIN 65 1 -NaNQ 5000.000000
>
> bash-3.2$ grep -i NAN
> rsl.out.0002
>
> WOULD GO OFF TOP:
> KF_ETA_PARA I,J,DPTHMX,DPMIN 1 32 -NaNQ 5000.000000
>
> bash-3.2$ grep -i NAN
> rsl.out.0003
>
> WOULD GO OFF TOP:
> KF_ETA_PARA I,J,DPTHMX,DPMIN 63 32 -NaNQ 5000.000000
>
> bash-3.2$ grep -i NAN
> rsl.out.0004
>
> WOULD GO OFF TOP:
> KF_ETA_PARA I,J,DPTHMX,DPMIN 1 63 -NaNQ 5000.000000
>
>
> I have Decreases the TIME step to 90sec but It has not helped me. The model aborts after running successfully for about 2-3 hours.
> PLS suggest.
>
> geeta
>
>
>
> Date: Fri, 4 Mar 2011 12:46:29 -0700
> From: wrfhelp at ucar.edu
> To: geeta124 at hotmail.com
> Subject: Re: WRF 3.2 Model not running after 4hrs of Integration.
>
>
>
>
>
>
>
> Message body
>
>
> Can you use ncview to look at your wrfout files? You may need to do
> to those outputs that are right before model stopped. Please check
> whether there is any weird data in those output files?
>
>
>
> Did you see any NaN when typing ncdump wrfout | grep -i Nan?
>
>
>
>
>
> On 3/3/2011 9:32 PM, Geeta Geeta wrote:
>
>
> Dear Sir,
>
> Thanks for the reply. I am running WRf 3.2 for the 3 domains 27, 9
> and 3 km for the 48hrs Forecast on the IBM P570 Machine. The
> Operating system is AIX5.3 and the code is compiled using xlf with
> POE in place.
>
> I had given the command bash$ time poe ../wrf.exe -procs 8.
>
>
>
> 1. The model gave segmentation fault after 4hrs of Integration. I
> also plotted the Model forecast for 2nd and 3rd hour at 27km
> resolution (Domain 1) So it showed me some data being plotted
>
> But when I tried to plot the output for the 2nd and 3rd
> domain, IT says ENTIRE GRID UNDEFINED. Kindly suggest.
>
>
>
>
> 2. >>>What data I have used ??
>
> I am using the .grib2 files as Initial and BC taken from
> ftp://ftpprd.ncep.noaa.gov.in at 1x1 degree resolution.
>
>
>
> 3. >>>What is the error message in your output file? Did
> you find any CFL violation? Your namelist.input looks fine.
> Please send us error messages in your run.
>
> I am attatching the rsl.error* and the rsl.out* files,
> namelist.input and namelist.wps files. It seems to me
> that there is no CFL violation.
>
>
>
> Thanks.
>
> geeta
>
>
>
>
>
>
>
> Date: Thu, 3 Mar 2011 17:20:41 -0700
>
> From: wrfhelp at ucar.edu
>
> To: geeta124 at hotmail.com
>
> Subject: Re: WRF 3.2 Model not running after 4hrs of Integration.
>
>
>
> Geeta,
>
>
>
> What is the error message in your output file? Did you find any
> CFL violation?
>
>
>
> Your namelist.input looks fine. Please send us error messages in
> your run.
>
>
>
>
>
> On 3/3/2011 3:57 AM, Geeta Geeta wrote:
>
> Dear All,
>
> I am running WRF3.2 for 3 domains, at 27, 9 and 3kms. After
> integrating for 4hours, the model gives segmentation fault. and
> these directories are created and does not integrate beyond.
>
>
>
> bash-3.2$ ncdump -v Times wrfout_d01_2010-08-04_00:00:00
>
> Times =
>
> "2010-08-04_00:00:00",
>
> "2010-08-04_01:00:00",
>
> "2010-08-04_02:00:00",
>
> "2010-08-04_03:00:00",
>
> "2010-08-04_04:00:00" ;
>
> }
>
>
>
> bash-3.2$ ncdump -v Times wrfout_d02_2010-08-04_00:00:00
>
> Times =
>
> "2010-08-04_00:00:00",
>
> "2010-08-04_01:00:00",
>
> "2010-08-04_02:00:00",
>
> "2010-08-04_03:00:00",
>
> "2010-08-04_04:00:00" ;
>
>
>
> bash-3.2$ ncdump -v Times wrfout_d03_2010-08-04_00:00:00
>
> Times =
>
> "2010-08-04_00:00:00",
>
> "2010-08-04_01:00:00",
>
> "2010-08-04_02:00:00",
>
> "2010-08-04_03:00:00",
>
> "2010-08-04_04:00:00" ;
>
>
>
> After integrating for 4hours, the model gives segmentation
> fault. and these directories are created and does not integrate
> beyond.
>
> drwxr-xr-x 2 256 Mar 03 04:20 coredir.5
>
> drwxr-xr-x 2 256 Mar 03 04:20 coredir.3
>
> drwxr-xr-x 2 256 Mar 03 04:20 coredir.2
>
> drwxr-xr-x 2 256 Mar 03 04:20 coredir.1
>
>
>
> Kindly help. The namelist.input file is also attached for
> reference.
>
>
>
> Geeta
>
>
>
>
>
>
>
>
>
> _______________________________________________
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> Wrf-users at ucar.edu
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--
Dr. Ágnes Mika
Advisor, Meteorology and Air Quality
Tel: +31 (0)527-242299
Fax: +31 (0)527-242016
Web: www.bmtargoss.com
BMT ARGOSS
P.O. Box 61, 8325 ZH Vollenhove
Voorsterweg 28, 8316 PT Marknesse
The Netherlands
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