Hi, I am new to CESM and I am planning a Last Glacial Maximum experiment to test the effects of iron from aeolian dust on the marine ecosystem. However, I have run into some problems while testing the model configuration.
What version of the code are you using?
CESM version 2.2.0 with G1850ECO compset and f09_g17 resolution.
Describe every step you took leading up to the problem:
user_nl_cice:
It seems like that the tracers DIC, TA, and Salinity are going very wrong and the MARBL module crashes.
My solution：
1. Increasing the dt_count (It doesn't work);
user_nl_pop:
user_nl_marbl:
user_nl_drof:
So, my question is:
What version of the code are you using?
CESM version 2.2.0 with G1850ECO compset and f09_g17 resolution.
Describe every step you took leading up to the problem:
- Set up run type as and atmospheric CO2.
- Set up land sea distribution due to the lowered sea level at the LGM according the tutorial at the 2024 paleoCAMP.
- Set up namelist changes.
user_nl_pop:
The initial condition is the history output from a previous experiment and was downloaded from Globus. And i have changed the variable names for potential temperature and salinity as TEMPERATURE and SALINITY respectively according to the other thread Using history files as initial conditions in cesm1.
user_nl_cice:
user_drof.streams.txt.rof.diatren_ann_rx1:
- Keep the restoring files as the modern ocean:
- Keep the modern riverine nutrient inputs:
- Keep the modern ecosystem initial conditions:
Describe your problem or question:
It seems like that the tracers DIC, TA, and Salinity are going very wrong and the MARBL module crashes.
My solution：
1. Increasing the dt_count (It doesn't work);
user_nl_pop:
2. Unenabled tracer restoring (It doesn't work);
user_nl_marbl:
3. Turns off the runoff input (It does work，the model has been running successfully for a year).
user_nl_drof:
So, my question is:
- Would turning off the runoff have a significant impact on the model results?
- Should I set the burial coefficient to zero when i turn off the runoff? (Just like this thread). However, it seems that the riverine nutrients are provided by a separate file.
- How can I appropriately set the burial coefficient to zero?