N1850_f09_tn14_20190913#

Data storage#

The data is stored on NIRD @ sigma2

/projects/NS2345K/noresm/cases/N1850_f09_tn14_20190913

Path to case directory#

on Fram @ sigma2

/cluster/projects/nn2345k/matsbn/NorESM/cases/N1850_f09_tn14_20190913/

Path to diagnostics#

http://ns2345k.web.sigma2.no/diagnostics/noresm/common/N1850_f09_tn14_20190913/

Summary of simulation#

New in this simulation:

New inital data file used in CLM5
Changes in history settings (for extended output) in user_nl_cam and user_nl_clm and removed CPLHIST output to user_nl_cpl

Continued to use:

preprocessorDefinitions.h: CPP flags: “#undef AEROCOM”, “#define AEROFFL”
clubb_gamma_coef = 0.286
the modifications to cldfrc2m.F90
CESM2.1.0 (branch featureCESM2.1.0-OsloDevelopment)
the correction of bug in the second-order in time term of the AM correction (cd_core.F90)
the removal of an inconsistency in the treatment of riverine carbon inputs in iHAMOCC (mo_riverinpt.F90)
the increased (x2) error tolerance in energy conservation test in CICE
the long wave aerosol optical depth (AOD) bug fixer optinterpol.F90 included as SourceMod
the updated emission files for CAM6-Nor (often referred to as FRC2)
the increase in DMS emissions @ high latitudes in order to reduce the net radiation imbalance @TOM (top of model)
the increase in width of Strait of Gibraltar from 15 km to 30 km
the modifications to the parameterisation of ice clouds (iceopt=5 and cldfrc2m.F90)
the modifications to the parameters bkopal, rcalc and ropal in iHAMOCC included as SourceMod
the modifications to the convection code included as SourceMod: zm_conv.F90: “zmst” modifications.
aerotab_table_dir = ‘/cluster/shared/noresm/inputdata/noresm-only/atm/cam/camoslo/AeroTab_8jun17’

File modifications to

CAM6-Nor: zm_conv.F90, cd_core.F90, optinterpol.F90.
CICE: ice_therm_vertical.F90
iHAMOCC: mo_riverinpt.F90, beleg_bgc.F90

were merged into featureCESM2.1.0-OsloDevelopment and the SourceMods no longer needed. Also the new emission files (frc2) and many of the parameter settings in user_nl_cam were included and no longer needed to be listed in user_nl_cam.

The increase in width of Strait of Gibraltar from 15 km to 30 km was included as default and no longer listed in user_nl_micom

The reset snow addition in user_nl_clm was included as default and no longer needed.

For all SourceMods and user name list specifics, see bottom of this page

Simulation specifics#


CESM parent	CESM2.1.0
Parent	N1850_f09_tn14_20190812
Run type	branch
Branch time from parent	01-01-1051
Simulated years	01-01-1051 - 31-12-1199
Compset	1850_CAM60%PTAERO_CLM50%BGC-CROP_CICE_MICOM%ECO_MOSART_SGLC_SWAV_BGC%BDRDDMS
Git branch	featureCESM2.1.0-OsloDevelopment
Git commit	1beadbb
Resolution	f09_tn14
Machine	Fram

Node allocation#

    <entry id="NTASKS">
      <type>integer</type>
      <values>
        <value compclass="ATM">1536</value>
        <value compclass="CPL">1536</value>
        <value compclass="OCN">91</value>
        <value compclass="WAV">300</value>
        <value compclass="GLC">1536</value>
        <value compclass="ICE">736</value>
        <value compclass="ROF">20</value>
        <value compclass="LND">780</value>
        <value compclass="ESP">1</value>
      </values>
      <desc>number of tasks for each component</desc>
    </entry>

Code modifications (SourceMods)#

Ice cloud parameterisation changes#

in components/cam/src/physics/cam/cldfrc2m.F90

Line 47 and 48 from

real(r8),  parameter :: qist_min     = 1.e-7_r8      ! Minimum in-stratus ice IWC constraint [ kg/kg ]
real(r8),  parameter :: qist_max     = 5.e-3_r8      ! Maximum in-stratus ice IWC constraint [ kg/kg ]

real(r8),  parameter :: qist_min     = 4.e-6_r8      ! Minimum in-stratus ice IWC constraint [ kg/kg ] 
real(r8),  parameter :: qist_max     = 2.5e-4_r8     ! Maximum in-stratus ice IWC constraint [ kg/kg ]

Line 883 and Line 1137 from

aist = max(0._r8,min(1._r8,qi/qist_min)) 

aist = max(0._r8,min(1._r8,sqrt(aist*qi/qist_min)))

User name lists#

gamma#

Gamma controls the skewness of Gaussian PDF for the subgrid vertical velocities (used in the Cloud Layers Unified By Binormals (CLUBB) scheme). A low gamma generally increases the amount of low clouds and hence gives a higher short-wave cloud forcing.

iceopt#

Iceopt is used for setting the parameterisation of ice-cloud fraction. The CESM2 default scheme for the parameterisation of the ice-cloud fraction is iceopt = 5, which includes a functional dependence of ice cloud fraction on the environmental relative humidity.

user_nl_cam#

! Users should add all user specific namelist changes below in the form of
! namelist_var = new_namelist_value

&micro_mg_nl
 micro_mg_dcs     = 5.5e-4

&clubb_params_nl
 clubb_gamma_coef = 0.286

&cldfrc2m_nl
 cldfrc2m_rhmini =0.90D0

&spmd_fv_inparm
 npr_yz         = 64,24,24,64
                                                                                                                                   

user_nl_clm#

finidat = '/cluster/shared/noresm/inputdata/lnd/clm2/initdata/I1850Clm50BgcCropSpinup_pAD_cplhist_f09_tn14.clm2.r.1051-01-01-00000.nc'

Time series of spinup#

MMspinup18 NorESM2-MM spinup simulation
Left column (from top to bottom): Globally and annually averaged Surface (2m) air temperature, global and volume averaged ocean temperature, Sea surface temperature (SST).
Right column (from top to bottom): Globally and annually Globally and annually averaged Net radiation @ top of model, Atlantic meridional oveturning circulation (AMOC) @ 26.5N.

MMspinup18_emis NorESM2-MM spinup simulation
Left column (from top to bottom): Globally and annually sum of Sea salt surface emissions, DMS (dimethylsulfide) surface emissions, POM (primary organic matter) surface emissions.
Right column (from top to bottom) Globally and annually averaged shortwave cloud forcing and longwave cloud forcing.

NorESM Experiments

N1850_f09_tn14_20190913

Contents