MARBL error

[agustin@unex_es]

Hi falks,

I am running a simulation of XXI century with: --compset BSSP585cmip6 --res f09_g17 beginning in 2015. When the model arrives to 2098 I get an error in MARBL

(Task 37, block 1) Message from (lon, lat) ( 344.935, 83.941), which is global (i,j) (136, 376). Level: 28
(Task 37, block 1) MARBL WARNING (marbl_co2calc_mod:drtsafe): (marbl_co2calc_mod:drtsafe) it = 4
(Task 37, block 1) MARBL WARNING (marbl_co2calc_mod:drtsafe): (marbl_co2calc_mod:drtsafe) x1,f = 0.5601319E-009-0.3048979E-003
(Task 37, block 1) MARBL WARNING (marbl_co2calc_mod:drtsafe): (marbl_co2calc_mod:drtsafe) x2,f = 0.8877493E-006-0.1793603E-002
(Task 37, block 1) MARBL ERROR (marbl_co2calc_mod:drtsafe): bounding bracket for pH solution not found
(Task 37, block 1) MARBL ERROR (marbl_co2calc_mod:drtsafe): (marbl_co2calc_mod:drtsafe) dic = 0.2115676E+004
(Task 37, block 1) MARBL ERROR (marbl_co2calc_mod:drtsafe): (marbl_co2calc_mod:drtsafe) ta = 0.1842716E+004
(Task 37, block 1) MARBL ERROR (marbl_co2calc_mod:drtsafe): (marbl_co2calc_mod:drtsafe) pt = 0.5302712E+001
(Task 37, block 1) MARBL ERROR (marbl_co2calc_mod:drtsafe): (marbl_co2calc_mod:drtsafe) sit = 0.2606700E+002
(Task 37, block 1) MARBL ERROR (marbl_co2calc_mod:drtsafe): (marbl_co2calc_mod:drtsafe) temp = -0.9062370E+002
(Task 37, block 1) MARBL ERROR (marbl_co2calc_mod:drtsafe): (marbl_co2calc_mod:drtsafe) salt = 0.2233660E+002
(Task 37, block 1) Message from (lon, lat) ( 344.935, 83.941), which is global (i,j) (136, 376). Level: 29

any hint about the problem will be wellcome

Thanks

Agustin

 

[katec]

Hi Agustin,
So it's difficult to be sure without more information, but there is an instability that occurs in the ocean in CESM 2.1 under high CO2 conditions. The way to address this is to increase the ocean time step. Typically, when we see this instability, we shorten the ocean time step by half. If you have already done this, or don't think that's the issue here, more information about your experiment would be helpful. Here is the information we need to fully address a help request: Information to include in help requests

 

[agustin@unex_es]

Thanks very much for your help, I will try to shorten the ocean time step. I'll report after that

Agustin