WRF model crashed with SBM fast Microphysics (mp_physics)

[shahbaz757]

Hi,

I tried to run the WRF model with the SBM and SBM fast Microphysics (mp_physics) but the model crashed immediately.

I am attaching my namelist file and rsl error files.

Please check it out and help me with the issue.

Thank you

 

[kwerner]

When I check your rsl.error* files, there are many CFL errors. For e.g.,

rsl.error.0105:          17  points exceeded cfl=2 in domain d01 at time 2022-09-10_12:00:36 hours
rsl.error.0105: MAX AT i,j,k:          209         119           2  vert_cfl,w,d(eta)=   13.4861088       66.2369919       7.86405802E-03
rsl.error.0118:           3  points exceeded cfl=2 in domain d01 at time 2022-09-10_12:00:36 hours
rsl.error.0118: MAX AT i,j,k:          185         132           4  vert_cfl,w,d(eta)=   2.54255342       80.5381851       1.24567151E-02
rsl.error.0131:         201  points exceeded cfl=2 in domain d01 at time 2022-09-10_12:00:36 hours
rsl.error.0131: MAX AT i,j,k:          150         141           4  vert_cfl,w,d(eta)=   528.553101       845.714233       1.24567151E-02
rsl.error.0133:           2  points exceeded cfl=2 in domain d01 at time 2022-09-10_12:00:36 hours
rsl.error.0133: MAX AT i,j,k:          196         139           4  vert_cfl,w,d(eta)=   2.56982255       4.45348978       1.24567151E-02
rsl.error.0139:         145  points exceeded cfl=2 in domain d01 at time 2022-09-10_12:00:36 hours
rsl.error.0139: MAX AT i,j,k:          372         138           7  vert_cfl,w,d(eta)=   41660.3555      -643407.375       2.29325294E-02
rsl.error.0147:           2  points exceeded cfl=2 in domain d01 at time 2022-09-10_12:00:36 hours
rsl.error.0147: MAX AT i,j,k:          188         163           4  vert_cfl,w,d(eta)=   2.63777041       4.45820427       1.24567151E-02
rsl.error.0148:         270  points exceeded cfl=2 in domain d01 at time 2022-09-10_12:00:36 hours
rsl.error.0148: MAX AT i,j,k:          228         157           2  vert_cfl,w,d(eta)=   965.154114       584.757812       7.86405802E-03

I see that you're already using a lower time_step and are using epssm, but this FAQ (What is the most common reason for a segmentation fault?) discusses a couple other options you can try - you may also have to run an even shorter time_step and use a higher value for epssm.

 

[shahbaz757]

Hi Admin,

Thank you so much for the suggestion, I was able to run the model successfully with SBM fast Microphysics by reducing the time_step.

Now when I try to run the model with SBM fast microphysics and the Tiedtke Cumulus physics Scheme I again encountered the model crash. I tried changing and reducing the time_step but that doesn't seem to work in this case.


I am attaching my new namelist file and the latest rsl error files. Please check it out and guide me on what is causing the issue in this case.

Thank you so much.
Shahbaz Khan

 

[kwerner]

I'm glad to hear you were able to resolve your original error. Since your new issue is not only modifying the cumulus scheme, but there are many differences between the two cases (when comparing the namelists), we ask that you post this new problem as a new thread. This helps to keep the threads organized with a single issue per thread, making them easier to read and search for other users in the future. Thanks.

 

[shahbaz757]

Okay thank you, I'll post a new thread.