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Update MOM_mixed_layer_restrat.F90 #532

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Update MOM_mixed_layer_restrat.F90 #532

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a5c4b45
Update MOM_mixed_layer_restrat.F90
amoebaliz Dec 12, 2023
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Merge branch 'dev/gfdl' into patch-1
amoebaliz Dec 19, 2023
a037574
Update MOM_mixed_layer_restrat.F90
amoebaliz Dec 19, 2023
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Merge branch 'NOAA-GFDL:dev/gfdl' into patch-1
amoebaliz Dec 19, 2023
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Update MOM_mixed_layer_restrat.F90
amoebaliz Dec 19, 2023
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Update MOM_mixed_layer_restrat.F90
amoebaliz Dec 19, 2023
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19 changes: 19 additions & 0 deletions src/parameterizations/lateral/MOM_mixed_layer_restrat.F90
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Original file line number Diff line number Diff line change
Expand Up @@ -114,6 +114,7 @@ module MOM_mixed_layer_restrat
integer :: id_wpup = -1
integer :: id_ustar = -1
integer :: id_bflux = -1
integer :: id_lfbod = -1 !LD: diag ID for dynamic front length
!>@}

end type mixedlayer_restrat_CS
Expand Down Expand Up @@ -801,6 +802,7 @@ subroutine mixedlayer_restrat_Bodner(CS, G, GV, US, h, uhtr, vhtr, tv, forces, d
wpup ! Turbulent vertical momentum [L H T-2 ~> m2 s-2 or kg m-1 s-2]
real :: uDml_diag(SZIB_(G),SZJ_(G)) ! A 2D copy of uDml for diagnostics [H L2 T-1 ~> m3 s-1 or kg s-1]
real :: vDml_diag(SZI_(G),SZJB_(G)) ! A 2D copy of vDml for diagnostics [H L2 T-1 ~> m3 s-1 or kg s-1]
real :: lf_bodner_diag(SZI_(G),SZJ_(G)) ! LD: Front width as in Bodner et al., 2023 (B22), eq 24 [L ~> m]
real :: U_star_2d(SZI_(G),SZJ_(G)) ! The wind friction velocity, calculated using the Boussinesq
! reference density or the time-evolving surface density in non-Boussinesq
! mode [Z T-1 ~> m s-1]
Expand All @@ -823,6 +825,8 @@ subroutine mixedlayer_restrat_Bodner(CS, G, GV, US, h, uhtr, vhtr, tv, forces, d
real :: u_star3 ! Cube of surface fruction velocity [m3 s-3]
real :: r_wpup ! reciprocal of vertical momentum flux [T2 L-1 H-1 ~> s2 m-2 or m s2 kg-1]
real :: absf ! absolute value of f, interpolated to velocity points [T-1 ~> s-1]
real :: f2_h ! Coriolis parameter at h-points squared [T-2 ~> s-2]
real :: absurdly_small_freq2 ! Frequency squared used to avoid division by 0 [T-2 ~> s-2]
real :: grid_dsd ! combination of grid scales [L2 ~> m2]
real :: h_sml ! "Little h", the active mixing depth with diurnal cycle removed [H ~> m or kg m-2]
real :: h_big ! "Big H", the mixed layer depth based on a time filtered "little h" [H ~> m or kg m-2]
Expand Down Expand Up @@ -851,6 +855,9 @@ subroutine mixedlayer_restrat_Bodner(CS, G, GV, US, h, uhtr, vhtr, tv, forces, d

covTS(:) = 0.0 ! Might be in tv% in the future. Not implemented for the time being.
varS(:) = 0.0 ! Ditto.

! This value is roughly (pi / (the age of the universe) )^2.
absurdly_small_freq2 = 1e-34*US%T_to_s**2 ! LD: Stole this from the MOM_diagnostics.F90

if (.not.associated(tv%eqn_of_state)) call MOM_error(FATAL, "mixedlayer_restrat_Bodner: "// &
"An equation of state must be used with this module.")
Expand Down Expand Up @@ -930,6 +937,14 @@ subroutine mixedlayer_restrat_Bodner(CS, G, GV, US, h, uhtr, vhtr, tv, forces, d
wpup(i,j) = rmean2ts(wpup(i,j), CS%wpup_filtered(i,j), &
CS%BLD_growing_Tfilt, CS%BLD_decaying_Tfilt, dt)
CS%wpup_filtered(i,j) = wpup(i,j)

! LD: Calculating Frontlength lf_bodner, used in B22 formula (eq 24).
f2_h = max((0.25*((G%CoriolisBu(I,J) + G%CoriolisBu(I-1,J-1)) + &
(G%CoriolisBu(I-1,J) + G%CoriolisBu(I,J-1))))**2, absurdly_small_freq2) ! LD: to prevent division by 0
lf_bodner_diag(i,j) = 0.25 * (( CS%mstar * u_star3 + CS%nstar * w_star3 )**two_thirds & ! (this line m2 s-2)
* ( US%m_to_L * GV%m_to_H * US%T_to_s**2 )) & ! [L H s2 m-2 T-2 ~> 1 or kg m-3]
/ (f2 * little_h(i,j))! [T-2 H ~> m s-2]

enddo ; enddo

if (CS%debug) then
Expand Down Expand Up @@ -1117,6 +1132,7 @@ subroutine mixedlayer_restrat_Bodner(CS, G, GV, US, h, uhtr, vhtr, tv, forces, d
if (CS%id_vhml > 0) call post_data(CS%id_vhml, vhml, CS%diag)
if (CS%id_uDml > 0) call post_data(CS%id_uDml, uDml_diag, CS%diag)
if (CS%id_vDml > 0) call post_data(CS%id_vDml, vDml_diag, CS%diag)
if (CS%id_lfbod > 0) call post_data(CS%id_lfbod, lf_bodner_diag, CS%diag) !LD: frontlength averaging

if (CS%id_uml > 0) then
do J=js,je ; do i=is-1,ie
Expand Down Expand Up @@ -1735,6 +1751,9 @@ logical function mixedlayer_restrat_init(Time, G, GV, US, param_file, diag, CS,
CS%id_bflux = register_diag_field('ocean_model', 'MLE_bflux', diag%axesT1, Time, &
'Surface buoyancy flux, B0, in Bodner mixed layer restratificiation parameterization', &
'm2 s-3', conversion=(US%Z_to_m**2*US%s_to_T**3))
CS%id_lfbod = register_diag_field('ocean_model', 'lf_bodner', diag%axesT1, Time, &
'Front length in Bodner mixed layer restratificiation parameterization', &
'm', conversion=(US%L_to_m)) !LD: register diag for dynamic front length
endif

! If MLD_filtered is being used, we need to update halo regions after a restart
Expand Down
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