b.e30_beta02.BLT1850.ne30_t232_wg37.108

[gustavo-marques]

Purpose:
Assess the impact of turning on waves (WW3) and using the wave-averaged Boussinesq equations plus the new vertical mixing settings in MOM6 (see details below)

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Description:
Clone of #106 + turning on WW3 and changing vertical mixing in MOM6.

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Case directory:

• Locally (if still available):
  /glade/campaign/cesm/cesmdata/cseg/runs/cesm2_0/b.e30_beta02.BLT1850.ne30_t232_wg37.108

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Sandbox:

• Locally (if still available): /glade/work/gmarques/cesm.sandboxes/cesm3_0_beta02_wily

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Diagnostics:

• Diags (if available):
• https://webext.cgd.ucar.edu/BLT1850/b.e30_beta02.BLT1850.ne30_t232_wg37.108/

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Output:

• Raw output on derecho (if still available): /glade/derecho/scratch/gmarques/archive/b.e30_beta02.BLT1850.ne30_t232_wg37.108

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Contacts:
@gustavo-marques, @fobryan3, @klindsay28, @dabail10, @cecilehannay

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Extra details:

Changes in user_nl_mom:

USE_CFC_CAP = True

FULL_DEPTH_KHTH_MIN = True
FULL_DEPTH_KHTR_MIN = True
KHTH_MIN = 50.
KHTR_MIN = 50.

Z_INIT_REMAP_GENERAL = True
INPUTDIR = "INPUT"
MAX_LAYER_THICKNESS_CONFIG = "FILE:dz_max_90th_quantile.nc,dz"

! Bill's changes

WAVE_METHOD = SURFACE_BANDS
SURFBAND_SOURCE = COUPLER
STOKES_DDT = True
STOKES_VF = True
STOKES_PGF = True
STK_BAND_COUPLER = 3      ;    4
SURFBAND_WAVENUMBERS = 0.04, 0.11, 0.33

FPMIX = True

KPP%
STOKES_MOST = True                       ! default = False
!COMPUTE_MONIN_OBUKHOV = True             ! default = False
ENHANCE_DIFFUSION = True                 ! default = True
!N_SMOOTH_RI = 0                          ! N_SMOOTH_RI = 1
%KPP

[adamrher]

It's a bit difficult to tune the clouds anymore to bring down RESTOM in 107 and 108, which are +0.54 W/m2 and +1.33 W/m2, respectively. But I think we could try increasing the ice fall speed micro_mg_vtrmi_factor = 1.0 -> 1.5. That should increase the outgoing longwave (cloudy and clear sky) to compensate for the reduction in outgoing longwave due to the cooler SSTs.

[adamrher]

A look at global SST, RESTOM and cloud forcing in these latest runs. Note the horizontal lines are the CERES_EBAF cloud forcing. 108 looks pretty good, we just gotta get that RESTOM down.

[fobryan3]

Thanks Adam. According to Bill L., the Southern Ocean mixed layer depths are very deep in the current tuning which could be contributing to excessive heat uptake. He is working on repairing that now. For the moment, I would suggest that you not go to any extreme lengths to get RESTOM down until Bill is happy with his parameter set.

[adamrher]

Got it @fobryan3. I'll hold off for now.