Hi,
Now it seems that in debug compilation mode, with WRF v4.5.1 (and the configuration I am using) model initializes properly. However, whilst integration, I step in a Floating point exception from the Boulac PBL scheme.
The error message (after 333 seconds of integration, 10 time steps for d01 in a 3 nested domain run) is the following one:
The corresponding line where the floating-point exception occurs is the following one in
I suspect that the floating-point exception, might occur with negative values to perform the square root, so I modified the code introducing:
Running the simulation with this new line, just before the segmentation fault, I got:
Which as you can see the product within the
According to comments in the code, this subroutine stands for the 'computation of the length scales for dissipation and eddy coefficients' found in
I am not an specialist in Boulac PBL scheme, so I would suggest that someone with a deeper knowledge of the scheme, if can purpose a solution in this case. What to do when dl[u/d] (up/down length scales) have different sign, and what does mean and what to do coherently with the parametrization. Because I suspect that it is not as simple as introduce an
Now it seems that in debug compilation mode, with WRF v4.5.1 (and the configuration I am using) model initializes properly. However, whilst integration, I step in a Floating point exception from the Boulac PBL scheme.
The error message (after 333 seconds of integration, 10 time steps for d01 in a 3 nested domain run) is the following one:
Code:
(...)
Caught signal 8 (Floating point exception: floating-point invalid operation)
==== backtrace (tid:3580340) ====
0 0x0000000000012cf0 __funlockfile() :0
1 0x000000000a87ee78 module_bl_boulac_mp_length_bougeault_() /ccc/work/cont003/gen6877/fitabllu/WRF/v451_git_FPS/intel/20-0-0/netcdf_4-7-4netcdff_4-5-3/dmpar/WRFdbg/phys/module_bl_boulac.f90:633
2 0x000000000a8785db module_bl_boulac_mp_boulac1d_() /ccc/work/cont003/gen6877/fitabllu/WRF/v451_git_FPS/intel/20-0-0/netcdf_4-7-4netcdff_4-5-3/dmpar/WRFdbg/phys/module_bl_boulac.f90:530The corresponding line where the floating-point exception occurs is the following one in
phys/module_bl_boulac.F in length_bougeault subroutine around line #632:
Code:
(...)
do iz=kts,kte
dld(iz)=min(dld(iz),dlg(iz))
dls(iz)=sqrt(dlu(iz)*dld(iz))
dlk(iz)=min(dlu(iz),dld(iz))I suspect that the floating-point exception, might occur with negative values to perform the square root, so I modified the code introducing:
Code:
(...)
do iz=kts,kte
dld(iz)=min(dld(iz),dlg(iz))
PRINT *,' length_bougeault -- Lluis ', iz, ' dlu', dlu(iz), ' dld', dld(iz), ' prod', dlu(iz)*dld(iz)
dls(iz)=sqrt(dlu(iz)*dld(iz))
dlk(iz)=min(dlu(iz),dld(iz))Running the simulation with this new line, just before the segmentation fault, I got:
Code:
length_bougeault -- Lluis 18 dlu 715.2068 dld
-18.28473 prod -13077.36SQRT is negativeAccording to comments in the code, this subroutine stands for the 'computation of the length scales for dissipation and eddy coefficients' found in
boulac1D subroutine. I am not an specialist in Boulac PBL scheme, so I would suggest that someone with a deeper knowledge of the scheme, if can purpose a solution in this case. What to do when dl[u/d] (up/down length scales) have different sign, and what does mean and what to do coherently with the parametrization. Because I suspect that it is not as simple as introduce an
IF ...