Solar radiation balance error (BalanceCheckMod.F90)

[jjang]

Hello.

I ran MPAS-CAM with ~120km mesh (dt=720s), but the model stopped due to a solar radiation balance error. The error messages in lnd.log.* were as follows:

WARNING:: BalanceCheck, solar radiation balance error (W/m2)
nstep = 7
errsol = 10.0897468947426
CTSM is stopping because errsol > 1.000000000000000E-005 W/m2
fsa = 299.907615764761
fsr = 59.3920879342818
forc_solad(1) = 124.655346313073
forc_solad(2) = 180.413579432516
forc_solai(1) = 39.3248587638318
forc_solai(2) = 4.81617229487935
forc_tot = 349.209956804300
CTSM is stopping
iam = 0: local patch index = 387
iam = 0: global patch index = 88113
iam = 0: global column index = 27860
iam = 0: global landunit index = 12668
iam = 0: global gridcell index = 4304
iam = 0: gridcell longitude = 160.9984373
iam = 0: gridcell latitude = 70.3330007
iam = 0: pft type = 11
iam = 0: column type = 1
iam = 0: landunit type = 1
ENDRUN:
ERROR: ERROR in BalanceCheckMod.F90 at line 950

In that simulation, I set iradlw=9 and iradsw=9 in user_nl_cam, which was the set-up for my high-resolution simulation. However, when I did not set those namelist variables, the simulation completed successfully.

Could you please let me know why those variables caused the model run to stop?

Thank you very much.
Jihyeon Jang