ERROR: ice: Ridging error

[Haechan Kimm]

Hi, I'm currently using CESM1.2 (B1850, T31_g37) to run simulations for 850AD.
However, after replacing the land surfdata with my own data (850AD), the model fails to run and displays the following ice ridging error:

<cesm.log>
...
Exceeded max number of ridging iterations
max = 50
Test:: index i = 0
Test:: index j = 0
istep1, my_task, iblk = 28025 15 4
Global block: 289
[cli_8]: aborting job:
application called MPI_Abort(MPI_COMM_WORLD, 1001) - process 8
(shr_sys_abort) ERROR: ice: Ridging error
(shr_sys_abort) WARNING: calling shr_mpi_abort() and stopping
[cli_15]: aborting job:
application called MPI_Abort(MPI_COMM_WORLD, 1001) - process 15
...

<ice.log>
...
Exceeded max number of ridging iterations
max = 50
Test:: index i = 0
Test:: index j = 0
istep1, my_task, iblk = 28025 0 4
Global block: 235
(shr_sys_abort) ERROR: ice: Ridging error
(shr_sys_abort) WARNING: calling shr_mpi_abort() and stopping
...

Could you please advise on how to resolve this issue?
Plus, I wonder how I can find the exact latitude and longitude of the error point. What is the iblk and global block in T31_g37?

 

[dbailey]

Did you look at the sea ice thickness here? For 850 conditions and using the gx3v7 grid, I am imagining it must almost be a snowball Earth! You can try reducing the timestep, but I am guessing it is just struggling with very thick ice.

Dave

 

[Haechan Kimm]

Did you look at the sea ice thickness here? For 850 conditions and using the gx3v7 grid, I am imagining it must almost be a snowball Earth! You can try reducing the timestep, but I am guessing it is just struggling with very thick ice.

Dave

Hello, Dave. Thank you for answering my question.
I checked the ice thickness, which grows up to 10 meters.

When I ran the same 850 AD simulation with f19_g16 resolution, there was no error.
Do you know why this problem only occurs on the T31_g37 grid?

Haechan