PUBLIC INTERFACE ~ PUBLIC DATA ~ PUBLIC ROUTINES ~ NAMELIST ~ DIAGNOSTIC FIELDS ~ ERROR MESSAGES ~ REFERENCES ~ NOTES

Module ocean_overflow_mod

Contact:  S.M. Griffies ,  Michael Bates
Reviewers: 
Change History: WebCVS Log

OVERVIEW

Tracer source from discharging dense shallow water into the abyss at the parcel's depth of neutral buoyancy.

Tracer source from discharging dense shallow water into the abyss at the parcel's depth of neutral buoyancy. Follow the approach of Campin and Goosse (1999), as well as modifications.

OTHER MODULES USED

       constants_mod
    diag_manager_mod
             fms_mod
     mpp_domains_mod
             mpp_mod
   ocean_density_mod
   ocean_domains_mod
ocean_parameters_mod
     ocean_types_mod
      ocean_util_mod
 ocean_workspace_mod

PUBLIC INTERFACE

ocean_overflow_init:
overflow:

PUBLIC DATA

None.

PUBLIC ROUTINES

  1. ocean_overflow_init

    DESCRIPTION
    Initial set up for mixing of tracers into the abyss next to topography.


  2. overflow

    DESCRIPTION
    Compute thickness and density weighted tracer source [tracer*rho*m/s] due to upstream tracer advection in regions where density-driven overflows are favorable.

    The MOM4 implementation of the Campin and Goosse (1999) algorithm is detailed in the MOM4 Technical Guide.



NAMELIST

&ocean_overflow_nml

use_this_module
For using this module. Default is false.
[logical]
debug_this_module
For debugging
[logical]
overflow_mu
Dissipation rate for the bottom friction. Campin and Goosse suggest overflow_mu=10^-4
[real, units: inverse seconds]
overflow_delta
Fraction of a grid cell participating in the overflow process. Campin and Goosse suggest overflow_delta=1/3.
[real, units: dimensionless]
overflow_umax
Maximum downslope speed.
[real, units: m/s]
do_bitwise_exact_sum
Set true to do bitwise exact global sum. When it is false, the global sum will be non-bitwise_exact, but will significantly increase efficiency. The default value is false.
[logical]
no_return_flow
Set true to remove the Campin and Goose return flow "piping". Default no_return_flow=.false. to recover the standard approach from Campin and Goose.
[logical]

DATA SETS

None.

ERROR MESSAGES

None.

REFERENCES

  1. Campin and Goosse (1999): Parameterization of density-driven downsloping flow for a coarse-resolution model in z-coordinate", Tellus 51A, pages 412-430
  2. S.M. Griffies, M.J. Harrison, R. C. Pacanowski, and A. Rosati A Technical Guide to MOM4 (2003) NOAA/Geophysical Fluid Dynamics Laboratory
  3. S.M. Griffies, Elements of mom4p1 (2006) NOAA/Geophysical Fluid Dynamics Laboratory

COMPILER SPECIFICS

None.

PRECOMPILER OPTIONS

None.

LOADER OPTIONS

None.

TEST PROGRAM

None.

KNOWN BUGS

None.

NOTES

None.

FUTURE PLANS

None.

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