FASTJ subr OPMIE error. Max NL exceeded

[maosier]

Hi,

I'm running WRF-Chemv3.9.1 with Fast-J (phot_opt=2). I got a problem during the simulation:
FASTJ Max NL exceeded jaddto(nc)+nc NL 501 500
-------------- FATAL CALLED ---------------
FATAL CALLED FROM FILE: <stdin> LINE: 76
FASTJ subr OPMIE error. Max NL exceeded
It seems something was wrong during the photolysis process. Could you help me solve the problem?

Thanks,
Maosier

 

[jordanschnell]

Hi Maosier,

Some sort of instability was reached (usually caused by very high concentrations of a species). Please attach your namelist.input.

Jordan

 

[maosier]

Hi Jordan,

Thanks for your reply. The namelist.input has been attached.

Maosier

 

[jordanschnell]

Hi Maosier,

One thing I noticed is that your number of vertical levels is quite small. I see you have specified them - did this configuration work for a previous simulation? My first suggestion would be to increase e_vert (maybe try 40?). You can leave the eta_levels option empty. You will also need to re-run real.exe before using wrf.exe.

Also, take a look at any output files that have been generated, are there any very high concentrations of PM2.5?, If so, you can try turning off aer_ra_feedback. Or turning off dust and anthropogenic emissions or turning off aerosol and gas chemistry altogether.

There is also a parameter in chem/module_phot_fastj.F (NL=500) that you could adjust (and recompile the model), but that should be a last resort.

Jordan

 

[maosier]

Hi Jordan,

This configuration worked well for the previous simulation. So I tried to increase the parameter NL from 500 to 700 and recompiled. The crash still occurred. Are there any other possible solutions?

Maosier