RRTMG, segmentation fault, WRF ideal LES

Dear all,

I am using WRF 3.8.1 to run an idealized LES with the ra_lw_physics=4, which means the RRTMG radiation
scheme is adopted. However, I got segmentation error after 5 hours of simulation time.

Any idea about this?

Attached please find my namelist.input and one of the error reports.

Best regards,

Xiang-Yu

The ideal LES case is designed for free convective PBL. The surface forcing is specified in namelist and homogeneous over the model domain. In this case, it makes no sense to turn on radiation scheme.

Thank you for your reply, Ming.

I see from the namelist that periodic boundary conditions are only applied to x and y direction instead of z direction.
This means one still need forcing at the z direction, like surface fluxes, divergence, and cooling scheme at the top such
that clouds can be formed.

&bdy_control
periodic_x = .true., .false., .false.,
periodic_y = .true., .false., .false.,
nested = .false., .true., .true.,

The options in &bdy_control are specified for lateral boundary. The model top is handled in different way. Please see the description here:
https://www2.mmm.ucar.edu/wrf/users/docs/technote/v4_technote.pdf

Thanks a lot, Ming!