b.e30_alpha09b.B1850C_MTso.ne30_t233_wgx3.362

[gustavo-marques]

Purpose:
Assess the impact of deepening the sills controlling the Denmark Strait and Faroe Bank overflows on Labrador Sea freezing.

Here are topography changes applied:

Denmark St.

Before

After

Faroe Bank Channel

Before

After

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Description:
Same as 360, but with some topography changes in the ocean. Starting from year 0093-01-01 of run 360.

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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_wgx3.360

• On github:
  https://github.com/NCAR/cesm_dev/tree/b.e30_alpha09b.B1850C_MTso.ne30_t233_wgx3.360

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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_wgx3.360/

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Output:

• Raw output on derecho (if still available): /glade/derecho/scratch/gmarques/archive/b.e30_alpha09b.B1850C_MTso.ne30_t233_wgx3.360/
• CAM Climos: /glade/campaign/cgd/amp/amwg/climo/b.e30_alpha09b.B1850C_MTso.ne30_t233_wgx3.360

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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

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Extra details:

• user_nl_mom

DIAG_COORD_DEF_RHO2 = "FILE:ocean_rho2_190917.nc,interfaces=rho2"
MLE_TAPER_FN_DEPTH = 1500.
MLE_TAPER_FN_POWER = 4
TOPO_EDITS_FILE = "topo_edits_overflow_260704.nc"
INPUTDIR = "INPUT"

! restart T/S from b.e30_alpha09b.B1850C_MTso.ne30_t233_wgx3.360.mom6.h.z.0092-12.nc

AGE_IC_FILE = "b.e30_alpha09b.B1850C_MTso.ne30_t233_wgx3.360.mom6.h.z.0092-12.nc"
AGE_IC_FILE_IS_Z = True
INIT_LAYERS_FROM_Z_FILE = True
TEMP_SALT_Z_INIT_FILE = "b.e30_alpha09b.B1850C_MTso.ne30_t233_wgx3.360.mom6.h.z.0092-12.nc"
TEMP_IC_VAR = "thetao"
SALT_IC_VAR = "so"
VELOCITY_CONFIG = "zero"
Z_INIT_FILE_PTEMP_VAR = "thetao" ! default = "ptemp"
Z_INIT_FILE_SALT_VAR = "so"

• SourceMods

/bin/cp  /glade/campaign/cesm/cesmdata/cseg/runs/cesm2_0/b.e30_alpha09b.B1850C_MTso.ne30_t233_wgx3.353/SourceMods/src.cam/*  SourceMods/src.cam/ 
/bin/cp  /glade/campaign/cesm/cesmdata/cseg/runs/cesm2_0/b.e30_alpha09b.B1850C_MTso.ne30_t233_wgx3.357/SourceMods/src.mom/*  SourceMods/src.mom/ 

[gustavo-marques]

Changing BBL_EFFIC from 0.01 --> 0.2 starting at 0019-01-01.

[gustavo-marques]

This run is in year 30, and Lab Sea is still frozen despite changing BBL_EFFIC to 0.2. I suspect that deepening the sills increases the overflow water reaching Lab Sea, which is why it is still frozen. Worth checking this later.