b.e30_alpha09b.B1850C_MTso.ne30_t233_wgx3.356

Start with the case setup in the listed CESM case directory and the b.e30_alpha09b...356 branch, then review the create_newcase and xmlchange commands plus the user_nl settings. Use the linked diagnostics and raw output to check whether the Bodner-to-FFH switch avoids negative overturning circulation in the Nordic Seas and large ACC oscillations from year 183 of run 348.

Purpose:
Check that switching from Bodner to FFH avoids negative overturing circulation in the Nordic Seas and large oscillations in the ACC. Starting from year 183 of run 348.

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Description:
Same as 354, but starting at year 183 of run 348.

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Case directory:

• Locally (if still available):
  /glade/campaign/cesm/cesmdata/cseg/runs/cesm2_0/b.e30_alpha09b.B1850C_MTso.ne30_t233_wgx3.356

• On github:
  https://github.com/NCAR/cesm_dev/tree/b.e30_alpha09b.B1850C_MTso.ne30_t233_wgx3.356

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Sandbox:

• Locally (if still available): /glade/work/gmarques/cesm.sandboxes/cesm3_0_alpha09b

• On github: https://github.com/ESCOMP/cesm/tree/cesm3_0_alpha09b

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Diagnostics:

• Diags (if available):
  https://webext.cgd.ucar.edu/BMT1850/b.e30_alpha09b.B1850C_MTso.ne30_t233_wgx3.356/

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Output:

• Raw output on derecho (if still available): /glade/derecho/scratch/gmarques/archive/b.e30_alpha09b.B1850C_MTso.ne30_t233_wgx3.356/
• CAM Climos: /glade/campaign/cgd/amp/amwg/climo/b.e30_alpha09b.B1850C_MTso.ne30_t233_wgx3.356

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Contacts:
@cecilehannay @dlawrenncar @adamrher @PeterHjortLauritzen @JulioTBacmeister @swrneale @slevis-lmwg @wwieder @olyson @gustavo-marques @iangrooms @fobryan3 @klindsay28 @dabail10 @duvivier @tilmes @mbramberger @gunterl

Extra details:

Here is the instructions to reproduce b.e30_alpha09b.B1850C_MTso.ne30_t233_wgx3.356

• Create new case

./create_newcase --compset B1850C_MTso --res ne30pg3_t233_wg37 
--case /glade/campaign/cesm/cesmdata/cseg/runs/cesm2_0/b.e30_alpha09b.B1850C_MTso.ne30_t233_wgx3.356 

• copy pe layout from previous case

/glade/campaign/cesm/cesmdata/cseg/runs/cesm2_0/b.e30_alpha08o.B1850C_MTso.ne30_t232_wgx3.334/env_mach_pes.xml 

• change to CAM_CONFIG_OPTS

./xmlchange CAM_CONFIG_OPTS='-pcols 9' --amend

• put the case in the database

./xmlchange CASE_GIT_REPOSITORY=git@github.com:NCAR/cesm_dev.git

• start from 334 at year 101

./xmlchange RUN_REFCASE=b.e30_alpha09a.B1850C_MTso.ne30_t233_wgx3.348
./xmlchange RUN_REFDATE=0183-01-01
./xmlchange RUN_TYPE=hybrid
./xmlchange GET_REFCASE=true
./xmlchange RUN_REFDIR=cesm2_init

• user_nl_cam

mfilt               =       0,       5,     20,      40,      12,      120,      1,   1
nhtfrq              =       0,     -24,    -24,      -3,       0,       -2,      0,  -8760
ndens               =       2,       2,      2,       2,       2,        1,      2,   1
interpolate_output  =  .true.,  .true., .true.,  .true., .false.,   .true.,     .true.
interpolate_nlat    =     192,     192,    192,     192,      192,     192,      192
interpolate_nlon    =     288,     288,    288,     288,      288,     288,      288

empty_htapes = .true.

fincl1 = 'ACTNI', 'ACTNL', 'ACTREI', 'ACTREL', 'AODDUST', 'AODDUSTdn','AODVIS', 'AODVISdn','BURDENBC',
'BURDENDUST', 'BURDENPOM', 'BURDENSEASALT',
'BURDENSO4', 'BURDENSOA', 'CAPE', 'CDNUMC',  'CLDHGH', 'CLDICE', 'CLDLIQ', 'CLDLOW',
'CLDMED', 'CLDTOT', 'CLOUD', 
'FCTI', 'FCTL', 'FLDS', 'FLNS', 'FLNSC', 'FLNT', 'FLNTC', 'FLUT',
'FREQZM', 'FSDS', 'FSDSC', 'FSNS', 'FSNSC', 'FSNT', 'FSNTC', 'FSNTOA', 'ICEFRAC', 'LANDFRAC', 'LHFLX', 'LWCF',
'OCNFRAC', 'OMEGA', 'OMEGA500', 'PBLH', 'PHIS', 'PINT', 'PMID', 'PRECC', 'PRECL', 'PRECSC', 'PRECSL', 'PRECT', 'PS', 'PSL',  'Q',
'QFLX', 'RELHUM', 'SHFLX', 'SOLIN', 'SST',
'SWCF',
'T', 'TAUX', 'TAUY', 'TFIX', 'TGCLDIWP', 'TGCLDLWP', 'TMQ', 'TREFHT', 'TS', 'U', 'U10',
'UBOT', 
'V', 'VBOT', 'Z3', 
'AODVISdn', 'CDNUMC',  'NUMICE', 'NUMLIQ','OMEGA500',
 'AQSO4_H2O2','AQSO4_O3', 
'ncl_a1SFWET',
'ncl_a2SFWET', 'ncl_a3SFWET', 'pom_a1SFWET', 'pom_a4SFWET', 'so4_a1SFWET', 'so4_a2SFWET', 'so4_a3SFWET', 'soa_a1SFWET',
'soa_a2SFWET', 'bc_c1SFWET', 'bc_c4SFWET', 'dst_c1SFWET', 'dst_c2SFWET', 'dst_c3SFWET', 'ncl_c1SFWET', 'ncl_c2SFWET',
'ncl_c3SFWET', 'pom_c1SFWET', 'pom_c4SFWET', 'so4_c1SFWET', 'so4_c2SFWET', 'so4_c3SFWET', 'soa_c1SFWET', 'soa_c2SFWET',
'bc_a1DDF', 'bc_a4DDF', 'dst_a1DDF', 'dst_a2DDF', 'dst_a3DDF', 'ncl_a1DDF', 'ncl_a2DDF', 'ncl_a3DDF',
'pom_a1DDF', 'pom_a4DDF', 'so4_a1DDF', 'so4_a2DDF', 'so4_a3DDF', 'soa_a1DDF', 'soa_a2DDF',
'so4_a1_CLXF', 'so4_a2_CLXF', 'SFbc_a4', 'SFpom_a4', 'SFso4_a1', 'SFso4_a2',
'so4_a1_sfgaex1', 'so4_a2_sfgaex1', 'so4_a3_sfgaex1', 'soa_a1_sfgaex1', 'soa_a2_sfgaex1',
'SFdst_a1','SFdst_a2', 'SFdst_a3', 'SFncl_a1', 'SFncl_a2', 'SFncl_a3',
'num_a2_sfnnuc1', 'SFSO2', 'OCN_FLUX_DMS', 'SAD_SULFC', 'SAD_TROP', 'SAD_AERO',
'AODVISstdn', 'REFF_AERO', 'so4_a1', 'so4_a2', 'SAD_AERO', 'PS', 'TROP_P', 'FSNTOAC',
'AODSSdn', 'AODSSdn', 'BURDENSO4dn', 'AODVISdn', 'AODVISstdn',
'AODBCdn','AODSOAdn','AODSSdn','AODPOMdn','AODSO4dn', 'AODDUSTdn','AODVISdn', 'AODVISstdn','BURDENSO4dn', 'SFDMS','BURDENBCdn', 'BURDENDUSTdn', 
'BURDENPOMdn', 'BURDENSEASALTdn', 'BURDENSO4dn', 'BURDENSOAdn', 'AODBCdn','AODSOAdn','AODSSdn','AODPOMdn','AODSO4dn', 'AODDUSTdn','AODVISdn', 'AODVISstdn','BURDENSO4dn', 'SFDMS','BURDENBCdn', 'BURDENDUSTdn', 'BURDENPOMdn', 'BURDENSEASALTdn', 'BURDENSO4dn', 'BURDENSOAdn', 
'CCN3', 'CFC11', 'CFC12', 'CH4','CO2', 'EXTINCTdn', 'N2O', 
'EFIX'

fincl3 = 'PRECT', 'PRECC', 'FLUT', 'U850', 'U200', 'V850', 'V200', 'OMEGA500', 'TS', 'SST', 'PSL', 'Z500'

fincl4 =  'PRECC','PRECL'


seasalt_emis_scale= 1.6D0
tracer_cnst_datapath           = '/glade/campaign/acom/acom-climate/tilmes/CAM7/b.e30_alpha08o.B1850C_MTt4s.ne30_t232_wgx3.330_branch.fix/atm/proc/TracerCnstCyclical1850'

tracer_cnst_file               = 'tracer_cnst_MTt4s_halons_3Dmonthly_1850climo330_c20260423.nc'

prescribed_ozone_datapath              = '/glade/campaign/acom/acom-climate/tilmes/CAM7/b.e30_alpha08o.B1850C_MTt4s.ne30_t232_wgx3.330_branch.fix/atm/proc/ozone_strataero_day_5_zm'

prescribed_ozone_file          = 'ozone_strataero_b.e30_alpha08o.B1850C_MTt4s.ne30_t232_wgx3.330_branch.fix_1850_5_30_climo_zm_5day_c260424.nc'

prescribed_strataero_datapath          = '/glade/campaign/acom/acom-climate/tilmes/CAM7/b.e30_alpha08o.B1850C_MTt4s.ne30_t232_wgx3.330_branch.fix/atm/proc/ozone_strataero_day_5_zm'

 prescribed_strataero_file              = 'ozone_strataero_b.e30_alpha08o.B1850C_MTt4s.ne30_t232_wgx3.330_branch.fix_1850_5_30_climo_zm_5day_c260424.nc'

stream_ndep_data_filename              = '/glade/campaign/acom/acom-climate/tilmes/CAM7/b.e30_alpha08o.B1850C_MTt4s.ne30_t232_wgx3.330_branch.fix/atm/proc/NDepositionCyclical1850/fndep_clm_MTt4s_3Dmonthly_1850climo330_c20260424.nc'

clubb_gamma_coef                =  0.298     
clubb_gamma_coefb               =  0.298   

clubb_penta_solve_method = 2
clubb_tridiag_solve_method = 2

• user_nl_clm

reseed_dead_plants = .true.
use_excess_ice_streams=.false. 

• user_nl_mom

DIAG_COORD_DEF_RHO2 = "FILE:ocean_rho2_190917.nc,interfaces=rho2"
MLE%
USE_BODNER23 = False
%MLE
FOX_KEMPER_ML_RESTRAT_COEF = 1.0
MLE_FRONT_LENGTH = 1000.0
MLE_MLD_DECAY_TIME = 3.456E+05
WAVE_ENHANCED_USTAR = False

• user_nl_cpl

histaux_l2x1yrg = .true.
histaux_atm2med_file1_enabled = .true.
histaux_atm2med_file2_enabled = .true.
histaux_atm2med_file3_enabled = .true.
histaux_atm2med_file4_enabled = .true.
histaux_atm2med_file5_enabled = .true.
histaux_atm2med_file5_history_n = 1
histaux_atm2med_file5_history_option = 'ndays'
histaux_atm2med_file5_ntperfile = 1

• user_nl_cice

r_snw = 0.75
restart_fsd = .true.
histfreq = "m", "x", "x", "x", "x"

• SourceMods
  There are no SourceMods.