Welcome to the new DiscussCESM forum!
We are still working on the website migration, so you may experience downtime during this process.

Existing users, please reset your password before logging in here: https://xenforo.cgd.ucar.edu/cesm/index.php?lost-password/

lnd_import ERROR: Longwave down sent from the atmosphere model is negative or zero

BoHuang

New Member
Dear all,
recently, I am working on CAM6 with variable-resolution simulation. I want to run the simulation with FHIST_BGC component set. I build the model and can successfully complete the the simulation for 5 days (STOP_N=5). However, the model always crash when I change the STOP_N to a longer time. The error occurs at time-step 1241, as "lnd_import ERROR: Longwave down sent from the atmosphere model is negative or zero". I have no idea how this error comes? Is there any one have idea how to fix it? Enclosed the log files. Thank you.

Greetings
Bo
 

Attachments

  • atm.log.txt
    545.8 KB · Views: 2
  • lnd.log.txt
    253.9 KB · Views: 2
  • cesm.log.txt
    317.5 KB · Views: 2

oleson

Keith Oleson
CSEG and Liaisons
Staff member
You might try posting in the CAM Forum since the problem seems likely to be with the atmosphere. I personally don't have any ideas from the land side.
 

BoHuang

New Member
Hi Oleson,

thank you for your suggestion. I can pass the error by changing the nsplit.

However, I got another error in nstep=1256

-----
Warning: incorrect ice nucleation number (nuci reset =0)
15974.8806117785 211.094338257501 0.573135485888197
3.272696509873641E-002 0.000000000000000E+000 0.000000000000000E+000
0.000000000000000E+000 0.000000000000000E+000 0.000000000000000E+000
1.524968712475104E-028 32.6903636583803
# of NaNs = 1
Which are NaNs = F F F F F F T F F F F F F F F F F F F F F F F F F F F F F F F
F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F F
Sl_t
gridcell index = 17636
ENDRUN:
ERROR:
lnd_export ERROR: One or more of the output from CLM to the coupler are NaN
----

enclosed the log files. How can I track or fix this error? Thank you very much.

Greetings,
Bo
 

Attachments

  • glc.log.txt
    21.1 KB · Views: 0
  • atm.log.txt
    551.5 KB · Views: 1
  • cpl.log.txt
    78.1 KB · Views: 0
  • ocn.log.txt
    879.2 KB · Views: 0
  • ice.log.txt
    270.2 KB · Views: 0
  • lnd.log.txt
    254.5 KB · Views: 1
  • cesm.log.txt
    339.5 KB · Views: 1
Top