Too weak AMOC in G_INTERANNUAL compset using f45_g37 grid

[wangsz@fio_org_cn]

Hi, I am running CESM 1.2.1 using the G_INTERANNUAL compset. Forcings are from the CORE II data set (1949-2009, 62 years per cycle). When I use the f09_g16 grid, the AMOC seems fine.


But when I repeat the above simulations using the f45g37 grid, AMOC seems to be pretty weak.

I guess the namelist needs to be modified for the low-resolution simulation. I enclose the pop2_in and ice_in files. Does anyone have any suggestions on tuning the low-resolution version? Or if you have after-tuned pop2_in and ice_in files for a gx3v7 POP2 grid, that will be better.

Thanks in advance,
Shizhu