N1850OCBDRDDMS_f19_tn14_Gibr_220319#

Data storage#

The data is stored on NIRD @ sigma2

/projects/NS2345K/DO_NOT_TOUCH/NS2345K/noresm/cases/N1850OCBDRDDMS_f19_tn14_Gibr_220319

Path to case directory#

on Vilje @ sigma2

/home/metno/oyvinds/NorESM2old/noresmdevcases/N1850OCBDRDDMS_f19_tn14_Gibr_220319

Path to diagnostics#

http://ns2345k.web.sigma2.no/diagnostics/noresm/common/N1850OCBDRDDMS_f19_tn14_Gibr_220319/

Summary of simulation#

New in this simulation:

Increased width of Strait of Gibraltar from 15 km to 30 km

Continued to use:

a 10% increase in the sea-salt emissions in order to reduce the net radiation imbalance @TOM (top of model)
the modifications to the parameters bkopal, rcalc and ropal in iHAMOCC included as SourceMod
the modifications to the convection code included as SourceMod
the namelist changes compared to repository for CAM6-Nor, MICOM and CLM5

Not included in this simulation:

increased (x2) error tolerance in energy conservation test in CICE

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

Simulation specifics#


CESM parent	CESM2.0.0
Parent	N1850OCBDRDDMS_f19_tn14_250119
Run type	branch
Branch time from parent	01-01-0361
Simulated years	01-01-0361 - 31-12-0420
Compset	1850_CAM60%PTAERO_CLM50%BGC-CROP_CICE_MICOM%ECO_MOSART_SGLC_SWAV_BGC%BDRDDMS
Git branch	featureCAM5-OsloDevelopment_trunk2.0-6
Git commit	9aa22b2
Resolution	f19_tn14
Machine	Vilje

Node allocation#

 <entry id="NTASKS">
      <type>integer</type>
      <values>
        <value compclass="ATM">768</value>
        <value compclass="CPL">768</value>
        <value compclass="OCN">186</value>
        <value compclass="WAV">300</value>
        <value compclass="GLC">768</value>
        <value compclass="ICE">504</value>
        <value compclass="ROF">8</value>
        <value compclass="LND">256</value>
        <value compclass="ESP">1</value>
      </values>
      <desc>number of tasks for each component</desc>
    </entry>

Code modifications (SourceMods)#

iHAMOCC modifications#

In components/micom/hamocc/beleg_bgc.F90

Line 209

bkopal = 1.e-6    !i.e. 1.0 mmol Si/m3

bkopal = 5.e-6    !i.e. 1.0 mmol Si/m3

Line 269 from

#elif defined(WLIN) 
      rcalc = 48.  ! calcium carbonate to organic phosphorous production ratio
      ropal = 35.  ! opal to organic phosphorous production ratio 

#elif defined(WLIN) 
      rcalc = 35.  ! calcium carbonate to organic phosphorous production ratio
      ropal = 45.  ! opal to organic phosphorous production ratio 

1.1 x seasalt emissions#

Line 176 in components/cam/src/chemistry/oslo_aero/seasalt_model.F90

!Eqn. 9 in Salter et al. (2015)
       numberFlux(:ncol,n) = 1.1_r8*whitecapAreaFraction(:ncol)*                                                     &
                            ( coeffA(n)*(sst(:ncol)-273.15_r8)*(sst(:ncol)-273.15_r8)*(sst(:ncol)-273.15_r8)  &
                            + coeffB(n)*(sst(:ncol)-273.15_r8)*(sst(:ncol)-273.15_r8)                         &
                            + coeffC(n)*(sst(:ncol)-273.15_r8)                                                &
                            + coeffD(n) )

Moist convection in CAM#

Moist convection modifications (“zmst” modifications) in

components/cam/src/NorESM/zm_convF90:

Increased error tolerance in energy conservation test in CICE#

Not included in this simulation

Includes the long wave aod error#

Information about the bug: The aerosol long wave calculations used information from the aerosol shortwave interpolation on aerosol size. The result was that aerosol longwave forcing was not included during night. A first estimate based on estimates from AMIP simulation is + 0.03 W/m2. The forcing is not evenly distributed, but mostly focused on Sahara including downstream and the Arabian peninsula. The numbers here are around 1-2 W/m2.

Note this bug was fixed in N1850OCBDRDDMS_f19_tn14_07052019

User name lists#

user_nl_cam#

&dyn_fv_inparm
 fv_am_correction= .true.
 fv_am_diag      = .true.
 fv_am_fix_lbl   = .true.
 fv_am_fixer     = .true.

&phys_ctl_nl
 dme_energy_adjust = .true.


&zmconv_nl
 zmconv_c0_lnd          =  0.0200D0
 zmconv_c0_ocn          =  0.0200D0
 zmconv_ke              =  8.0E-6

&micro_mg_nl
 micro_mg_dcs             = 5.0e-4

&clubb_params_nl
 clubb_gamma_coef = 0.258

&gw_drag_nl
 tau_0_ubc                = .true.

&cldfrc_nl
 cldfrc_iceopt          =  4
 
&phys_ctl_nl
aerotab_table_dir =
'/work/shared/noresm/inputdata/noresm-only/atm/cam/camoslo/AeroTab_8jun17'

user_nl_clm#

Reset snow: Remove infiltration excess water as runoff if the temperature of the surface water pool is below freezing.

finidat = '/work/shared/noresm/inputdata/cesm2_init/b.e20.B1850.f09_g17.pi_control.all.297/0308-01-01/b.e20.B1850.f09_g17.pi_control.all.297.clm2.r.0308-01-01-00000.nc'
use_init_interp = .true.
reset_snow = .true.

user_nl_micom#

Increased width of Strait of Gibraltar from 15 km to 30 km

set CWMWTH = "      30.e3,      30.e3"

Time series of spinup#

LMspinup3 NorESM2-LM spinup simulations
Left column (from top to bottom): Globally and annually averaged Net radiation @ top of model, Surface (2m) air temperature, Sea surface temperature (SST), global and volume averaged ocean temperature, Atlantic meridional oveturning circulation (AMOC) @ 26.5N.
Right column (from top to bottom): Globally and annually sum of Sea salt surface emissions, DMS (dimethylsulfide) surface emissions, globally and annually averaged vertically-integrated total cloud cover, shortwave cloud forcing and longwave cloud forcing.

NorESM Experiments

N1850OCBDRDDMS_f19_tn14_Gibr_220319

Contents