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

Module ocean_horz_diffuse_mod

Contact:  R. C. Pacanowski
Reviewers:  Stephen M. Griffies
Change History: WebCVS Log


OVERVIEW

Thickness weighted time tendency for tracer from horizontal laplacian diffusion

The diffusivity used to determine the strength of the tendency can be a general function of space yet it is constant in time. A namelist option exists that determines this diffusivity as a local function of the grid spacing.


OTHER MODULES USED

      constants_mod
diag_manager_mod
fms_mod
mpp_domains_mod
mpp_mod
ocean_domains_mod
ocean_obc_mod
ocean_operators_mod
ocean_types_mod
ocean_workspace_mod

PUBLIC INTERFACE

ocean_horz_diffuse_init:
horz_diffuse:


PUBLIC DATA

None.


PUBLIC ROUTINES

  1. ocean_horz_diffuse_init

    DESCRIPTION
    Initialize the horizontal laplacian diffusion module by registering fields for diagnostic output and performing some numerical checks to see that diffusivity is set appropriately.


  2. horz_diffuse

    DESCRIPTION
    This function computes the thickness weighted time tendency for tracer from horizontal laplacian diffusion.



NAMELIST

&ocean_horz_diffuse_lap_nml

horz_diffuse_on
Must be true to use this module
[logical]
alap
This is the value for the space-time constant Laplacian diffusivity.
[real, units: m^2/sec]
tracer_mix_micom
If .true., then the diffusivity is set according to a velocity scale times the grid spacing. It is based on an approach recommended by Eric Chassignet that is used in the Miami Isopycnal Model (MICOM).
[logical]
vel_micom
Velocity scale that is used for computing the MICOM diffusivity.
[real, units: m/sec]
verbose_init
For verbose writes during initialization
[logical]


DATA SETS

None.


ERROR MESSAGES

None.


REFERENCES

None.


COMPILER SPECIFICS

None.


PRECOMPILER OPTIONS

None.


LOADER OPTIONS

None.


TEST PROGRAM

None.


KNOWN BUGS

None.


NOTES

The numerical implementation requires no calls to mpp_update_domains.


FUTURE PLANS

None.


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