1. Main Settings

Experiment name: f.e12.FAMIPCN.f19_f19

  • f f compset;
    “F” compsets use CAM,CLM, CICE(prescribed-thermo), DOCN(prescribed-SST).
  • e12 cesm1.2.2 (model version)
  • FAMIPCN AMIP run for CMIP5 protocol with CLM/CN:
    AMIP_CAM4_CLM40%CN_CICE%PRES_DOCN%DOM_RTM_SGLC_SWAV
    AMIP: time, AMIP runs
    CAM4: atmosphere model CAM4
    CLM40: land model, clm4.0
    CN (carbon-nitrogen) model version: a biogeochemistry model that simulates the carbon and nitrogen cycles
    CICE%PRES: prescribed sea ice
    DOCN%DOM: DOCN data ocean mode
    RTM: river transport model, land river runoff
    SGLC: Land Ice, Stub glacier (land ice) component
    SWAV: Wave, Stub wave component
  • f19_f19 1.9x2.5_1.9x2.5
    atm_grid,lnd_grid,ice_grid,ocn_grid: 1.9x2.5
    atm_grid_type,ocn_grid_type: finite volume

1.1 output frequency

1.2 enable -COSP option

In user_nl_cam

&cospsimulator_nl
docosp         = .true.
cosp_amwg      = .true.
cosp_cfmip_da = .true. #daily simulator

2. Long Simulations

3. Short Simulations

3.1 Initial Conditions

3.1.1 generate initial conditions

Base: f.e12.FAMIPCN.f19_f19.short.Parent Modify env_run.xml

./xmlchange RUN_STARTDATE = '1978-10-01'
./xmlchange STOP_OPTIONS = 'nmonths' 
./xmlchange STOP_N = '3'
./xmlchange RESUBMIT = '3'

Modify user_nl_cam

inithist = 'MONTHLY'
inithist_all = .true.

Also remember to set relevant perturbed parameters in user_nl_cam

cldfrc_rhminl = 0.91
cldopt_rliqocean = 14
hkconv_cmftau = 1800
cldfrc_rhminh = 0.80
zmconv_tau = 3600

After 4 runs consecutively, in $ARCHIVE/rest, there will be 4 directories, containing initial files for 1979-01-01, 1979-04-01, 1979-07-01, 1979-10-01. Example file list in 1979-01-01:

f.e12.FAMIPCN.f19_f19.short.Parent.cam.h0.1978-12.nc
f.e12.FAMIPCN.f19_f19.short.Parent.cam.h1.1978-10-01-00000.nc
f.e12.FAMIPCN.f19_f19.short.Parent.cam.h2.1978-12-30-10800.nc
f.e12.FAMIPCN.f19_f19.short.Parent.cam.i.1979-01-01-00000.nc
f.e12.FAMIPCN.f19_f19.short.Parent.cam.r.1979-01-01-00000.nc
f.e12.FAMIPCN.f19_f19.short.Parent.cam.rh0.1979-10-31-00000.nc
f.e12.FAMIPCN.f19_f19.short.Parent.cam.rs.1979-01-01-00000.nc
f.e12.FAMIPCN.f19_f19.short.Parent.cice.r.1979-01-01-00000.nc
f.e12.FAMIPCN.f19_f19.short.Parent.clm2.h0.1978-12.nc
f.e12.FAMIPCN.f19_f19.short.Parent.clm2.r.1979-01-01-00000.nc
f.e12.FAMIPCN.f19_f19.short.Parent.clm2.rh0.1979-01-01-00000.nc
f.e12.FAMIPCN.f19_f19.short.Parent.cpl.r.1979-01-01-00000.nc
f.e12.FAMIPCN.f19_f19.short.Parent.docn.rs1.1979-01-01-00000.bin
f.e12.FAMIPCN.f19_f19.short.Parent.rtm.h0.1978-12.nc
f.e12.FAMIPCN.f19_f19.short.Parent.rtm.r.1979-01-01-00000.nc
f.e12.FAMIPCN.f19_f19.short.Parent.rtm.rh0.1979-01-01-00000.nc
rpointer.atm
rpointer.drv
rpointer.ice
rpointer.lnd
rpointer.ocn
rpointer.rof

scripts: csh.init.diff.niagara generate initial conditions for each parameter setting (modify and submit 50cases: f.e12.FAMIPCN.f19_f19.init.diff.*)

3.2 start initial runs (same initial condition for each parameter setting)

scripts:

  1. bash ==init.short.parent.niagara== to generate parent run files [change runstartdate]
  2. sbatch ==csh.init.short.child.niagara== to run 50 ensembles in given start date [change runstartdate] f.e12.FAMIPCN.f19_f19.short.op.$i.$runstartdate
  3. munual run 4 parent runs in f.e12.FAMIPCN.f19_f19.init.op.$runstartdate genarated by ==init.short.parent.niagara== [munually modify parameters in user_nl_cam]

Modify initial files, in user_nl_cam (use the initial files generate by $3.1$)

ncdata = 'f.e12.FAMIPCN.f19_f19.short.Parent.cam.i.1979-01-01-00000.nc' #initial files for CAM

By default, this file should soft link to $RUN, setting RUN_REFCASE and GET_REFCASE=TRUE to make true of this. One can also indicate specific path for initial file, but if initial conditions files are not in $RUN directory, make sure to also set other model’s .r. files to avoid error. I prefer to ponit all initial files to $RUN for an easier operation. Modify env_run.xml

./xmlchange RUN_TYPE=hybrid #default is hybrid for FAMIPCN, but make sure set it up anyway
./xmlchange RUN_STARTDATE=1979-01-01
./xmlchange RUN_REFCASE=f.e12.FAMIPCN.f19_f19.short.Parent #which REFCASE to look for in /inputdata/ccsm_init
./xmlchange RUN_REFDATE=1979-01-01 #which date/directory in REFCASE to use

./xmlchange GET_REFCASE=TRUE #soft link initial files to $RUN directory

One can have a case start from 1979-01-01 but using initial conditions in 1979-04-01 by setting RUN_STARTDATE=1979-01-01 and RUN_REFDATE=1979-04-01. (If these is a REFCASE started in 1979-04-01 existed.) Build a new case or rebuild the original case

3.3 initial runs with different initial conditions for different parameter setting

scripts: csh.init.diff.short.child.parent