Run PXLSM WRF for CMAQ V5.5

1

Hi~ everyone~

I am currently using WRF_V4.7.0 with PX LSM and OBSGRID enabled, in preparation for coupling with CMAQ_V5.5. We have followed the recommended namelist settings from the following link:

However, we are encountering a runtime issue when running WRF. The rsl.error.0000 file shows the following fatal error:

PX LSM will use the MODIS landuse tables
OBS NUDGING is requested on a total of 1 domain(s).
-------------- FATAL CALLED ---------------
FATAL CALLED FROM FILE: LINE: 415
RIBX never exceeds RIC, RIB(i,kte) = 0.000000 THETAV(i,1) = NaN MOL= NaN TCONV = 0.000000 WST = NaN KMIX = 45 UST = NaN TST = NaN U,V = NaN NaN I,J= 1 199

I would like to understand the cause of this error. If anyone has experience with this issue or insights into its potential causes, I would greatly appreciate your suggestions. Thank you!

Here are our namelistinputs:
namelist.oa_201904.txt (2.5 KB)
namelist.wps.201904_ERA5.txt (2.0 KB)
namelist_original.input.201904_PXLSM.txt (9.4 KB)

2

This error in acm pbl code tends to catch problems that can be occurring anywhere in the model. It says that thetav, U, and V are all NaN. Something big is wrong. I can’t tell what it is.

I noticed that you timestep is very small for a mother domain of 81 km

3

Thank you for your reply. I will double-check to see if there is any issue with the OBSGRID observation data or the processing steps.

Initially, I used a time step of 120, but I encountered the same problem. Later, I tried using smaller time steps to test and see if it would help.