Request for restart files and namelist settings for case b40.mh6ka.1deg.003 (CESM1.2.2 mid-Holocene experiment)

[zhangguangzhi]

Dear CESM developers,
I am currently planning to perform a series of mid-Holocene experiments using CESM1.2.2. My goal is to build upon the official CESM mid-Holocene simulation and conduct additional sensitivity experiments based on that configuration.
According to the CESM experiment database, the CCSM4 mid-Holocene simulation b40.mh6ka.1deg.003 was conducted with a 1° resolution (0.9×1.25° atmosphere and gx1v6 ocean grid) and the B_1850_CN compset. The simulation spans years 801–1316 and represents the PMIP3 mid-Holocene experiment with 6 ka orbital and greenhouse gas forcing.
However, I have encountered some difficulties reproducing or continuing this experiment:

1. I could not find the restart files for the case b40.mh6ka.1deg.003 and i40.mh6ka.1deg.001.clm2.r.1242-01-01-00000.nc.
2. I am also unable to locate the namelist configuration files used for this experiment, such as
   • user_nl_cam
   • user_nl_clm
   • user_nl_pop
   • user_nl_cpl
   • user_nl_cice
3. Without these files, it is difficult to reproduce the exact experimental setup or to continue experiments based on this simulation.

Therefore, I would like to kindly ask:

• Is it possible to access the restart files for b40.mh6ka.1deg.003?
• Could the developers provide the namelist configuration files used for this case (e.g., user_nl_cam, user_nl_clm, user_nl_pop, user_nl_cpl, user_nl_cice)?
• Alternatively, are there recommended steps or documentation for reproducing this mid-Holocene experiment configuration in CESM1.2.2?

 

[asphilli]

Parts of this question were addressed in another thread, but to expand a bit on questions #1 and #2:
1. The b40.mh6ka.1deg.003 simulation is over 15 years old, so there is a good chance that the restarts from this simulation no longer exist. I could not locate them, but perhaps someone else can.
2. For others looking to assist on this, in the other linked thread I tarred up the run directory from here: /glade/campaign/cesm/cesmdata/cseg/runs/ccsm4_0/b40.mh6ka.1deg.003
There are no user_nl files present in this case directory.
3. Hopefully someone else can speak to this.