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MOM6: +Rotationally symmetric neutral diffusion option #442

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Original file line number Diff line number Diff line change
Expand Up @@ -2167,6 +2167,11 @@ NDIFF_USE_UNMASKED_TRANSPORT_BUG = False ! [Boolean] default = False
! If true, use an older form for the accumulation of neutral-diffusion
! transports that were unmasked, as used prior to Jan 2018. This is not
! recommended.
NDIFF_ANSWER_DATE = 20240101 ! default = 20240101
! The vintage of the order of arithmetic to use for the neutral diffusion.
! Values of 20240330 or below recover the answers from the original form of the
! neutral diffusion code, while higher values use mathematically equivalent
! expressions that recover rotational symmetry.

! === module MOM_hor_bnd_diffusion ===
! This module implements horizontal diffusion of tracers near boundaries
Expand Down
5 changes: 5 additions & 0 deletions ice_ocean_SIS2/Baltic_OM4_05/MOM_parameter_doc.all
Original file line number Diff line number Diff line change
Expand Up @@ -2279,6 +2279,11 @@ NDIFF_USE_UNMASKED_TRANSPORT_BUG = False ! [Boolean] default = False
! If true, use an older form for the accumulation of neutral-diffusion
! transports that were unmasked, as used prior to Jan 2018. This is not
! recommended.
NDIFF_ANSWER_DATE = 20240101 ! default = 20240101
! The vintage of the order of arithmetic to use for the neutral diffusion.
! Values of 20240330 or below recover the answers from the original form of the
! neutral diffusion code, while higher values use mathematically equivalent
! expressions that recover rotational symmetry.

! === module MOM_hor_bnd_diffusion ===
! This module implements horizontal diffusion of tracers near boundaries
Expand Down
5 changes: 5 additions & 0 deletions ice_ocean_SIS2/OM4_05/MOM_parameter_doc.all
Original file line number Diff line number Diff line change
Expand Up @@ -2279,6 +2279,11 @@ NDIFF_USE_UNMASKED_TRANSPORT_BUG = False ! [Boolean] default = False
! If true, use an older form for the accumulation of neutral-diffusion
! transports that were unmasked, as used prior to Jan 2018. This is not
! recommended.
NDIFF_ANSWER_DATE = 20240101 ! default = 20240101
! The vintage of the order of arithmetic to use for the neutral diffusion.
! Values of 20240330 or below recover the answers from the original form of the
! neutral diffusion code, while higher values use mathematically equivalent
! expressions that recover rotational symmetry.

! === module MOM_hor_bnd_diffusion ===
! This module implements horizontal diffusion of tracers near boundaries
Expand Down
5 changes: 5 additions & 0 deletions ice_ocean_SIS2/OM_1deg/MOM_parameter_doc.all
Original file line number Diff line number Diff line change
Expand Up @@ -2222,6 +2222,11 @@ NDIFF_USE_UNMASKED_TRANSPORT_BUG = False ! [Boolean] default = False
! If true, use an older form for the accumulation of neutral-diffusion
! transports that were unmasked, as used prior to Jan 2018. This is not
! recommended.
NDIFF_ANSWER_DATE = 20240101 ! default = 20240101
! The vintage of the order of arithmetic to use for the neutral diffusion.
! Values of 20240330 or below recover the answers from the original form of the
! neutral diffusion code, while higher values use mathematically equivalent
! expressions that recover rotational symmetry.

! === module MOM_hor_bnd_diffusion ===
! This module implements horizontal diffusion of tracers near boundaries
Expand Down
5 changes: 5 additions & 0 deletions ocean_only/global_ALE/hycom/MOM_parameter_doc.all
Original file line number Diff line number Diff line change
Expand Up @@ -2217,6 +2217,11 @@ NDIFF_USE_UNMASKED_TRANSPORT_BUG = False ! [Boolean] default = False
! If true, use an older form for the accumulation of neutral-diffusion
! transports that were unmasked, as used prior to Jan 2018. This is not
! recommended.
NDIFF_ANSWER_DATE = 20240101 ! default = 20240101
! The vintage of the order of arithmetic to use for the neutral diffusion.
! Values of 20240330 or below recover the answers from the original form of the
! neutral diffusion code, while higher values use mathematically equivalent
! expressions that recover rotational symmetry.

! === module MOM_hor_bnd_diffusion ===
! This module implements horizontal diffusion of tracers near boundaries
Expand Down
5 changes: 5 additions & 0 deletions ocean_only/global_ALE/z/MOM_parameter_doc.all
Original file line number Diff line number Diff line change
Expand Up @@ -2164,6 +2164,11 @@ NDIFF_USE_UNMASKED_TRANSPORT_BUG = False ! [Boolean] default = False
! If true, use an older form for the accumulation of neutral-diffusion
! transports that were unmasked, as used prior to Jan 2018. This is not
! recommended.
NDIFF_ANSWER_DATE = 20240101 ! default = 20240101
! The vintage of the order of arithmetic to use for the neutral diffusion.
! Values of 20240330 or below recover the answers from the original form of the
! neutral diffusion code, while higher values use mathematically equivalent
! expressions that recover rotational symmetry.

! === module MOM_hor_bnd_diffusion ===
! This module implements horizontal diffusion of tracers near boundaries
Expand Down
5 changes: 5 additions & 0 deletions ocean_only/tracer_mixing/rho/MOM_parameter_doc.all
Original file line number Diff line number Diff line change
Expand Up @@ -1625,6 +1625,11 @@ NDIFF_USE_UNMASKED_TRANSPORT_BUG = False ! [Boolean] default = False
! If true, use an older form for the accumulation of neutral-diffusion
! transports that were unmasked, as used prior to Jan 2018. This is not
! recommended.
NDIFF_ANSWER_DATE = 20240101 ! default = 20240101
! The vintage of the order of arithmetic to use for the neutral diffusion.
! Values of 20240330 or below recover the answers from the original form of the
! neutral diffusion code, while higher values use mathematically equivalent
! expressions that recover rotational symmetry.

! === module MOM_hor_bnd_diffusion ===
! This module implements horizontal diffusion of tracers near boundaries
Expand Down
5 changes: 5 additions & 0 deletions ocean_only/tracer_mixing/z/MOM_parameter_doc.all
Original file line number Diff line number Diff line change
Expand Up @@ -1577,6 +1577,11 @@ NDIFF_USE_UNMASKED_TRANSPORT_BUG = False ! [Boolean] default = False
! If true, use an older form for the accumulation of neutral-diffusion
! transports that were unmasked, as used prior to Jan 2018. This is not
! recommended.
NDIFF_ANSWER_DATE = 20240101 ! default = 20240101
! The vintage of the order of arithmetic to use for the neutral diffusion.
! Values of 20240330 or below recover the answers from the original form of the
! neutral diffusion code, while higher values use mathematically equivalent
! expressions that recover rotational symmetry.

! === module MOM_hor_bnd_diffusion ===
! This module implements horizontal diffusion of tracers near boundaries
Expand Down
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