N1850_f09_tn14_20190610#

Data storage#

The data is stored on NIRD @ sigma2

/projects/NS2345K/noresm/cases/N1850_f09_tn14_20190610

Path to case directory#

on Fram @ sigma2

/cluster/projects/nn2345k/matsbn/NorESM/cases/N1850_f09_tn14_20190610/

Path to diagnostics#

http://ns2345k.web.sigma2.no/diagnostics/noresm/common/N1850_f09_tn14_20190610/

Summary of simulation#

New in this simulation:

Modifications to cldfrc2m.F90: same as N1850_f09_tn14_20190604 except qist_min = 5.e-6_r8 -> 4.e-6_r8

Continued to use:

CESM2.1.0 (branch featureCESM2.1.0-OsloDevelopment)
clubb_gamma_coef = 0.283
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’
same namelist changes as N1850_f09_tn14_20190604

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_20190604
Run type	branch
Branch time from parent	01-01-0481
Simulated years	01-01-0481 - 31-12-0510
Compset	1850_CAM60%PTAERO_CLM50%BGC-CROP_CICE_MICOM%ECO_MOSART_SGLC_SWAV_BGC%BDRDDMS
Git branch	featureCESM2.1.0-OsloDevelopment
Git commit	4e019d7
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 = 0.283

&cldfrc2m_nl
 cldfrc2m_rhmini =0.90D0

                                                                                                                                   

Time series of spinup#

MMspinup12

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.

MMspinup12_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_20190610

Contents