PUBLIC INTERFACE ~ PUBLIC ROUTINES ~ NAMELIST

Module ocean_increment_tracer_mod

Contact:  Russell Fiedler ,  Paul Sandery
Reviewers: 
Change History: WebCVS Log

OVERVIEW

Thickness weighted tracer tendency [tracer*meter/sec] from increments.

This increment module performs incremental update analysis (IUA), an approach used in data assimilation and forecasting to reduce spurious perturbations when correcting the model state. IUA involves restoring to analysis increments i.e. differences between model and analysis fields rather than actual fields (See Bloom et al., 1996). The user can define the period that IUA is carried out and also the fraction of the increment to be restored over that period. This module applies a general 3D source to tracer. The sources can occur at any location and with any distribution in the domain An array of tracer tendencies due to the increments is augmented through a call to increment_tracer_source. The array of tracer tendencies must be reset to zero between calls. The user is responsible for providing (and registering) the data on the model grid of values towards which the etas are being driven.

OTHER MODULES USED

        diag_manager_mod
                 fms_mod
                 mpp_mod
time_interp_external_mod
        time_manager_mod
       ocean_domains_mod
    ocean_parameters_mod
         ocean_types_mod
     ocean_workspace_mod

PUBLIC INTERFACE

ocean_increment_tracer_init:
ocean_increment_tracer_source:

PUBLIC ROUTINES

  1. ocean_increment_tracer_init

    DESCRIPTION
    This subroutine is intended to be used to initialize the increments. Everything in this subroutine is a user prototype, and should be replacable.


  2. ocean_increment_tracer_source

    DESCRIPTION
    This subroutine calculates thickness weighted and density weighted time tendencies of tracers due to damping by increments.


NAMELIST

&ocean_increment_tracer_nml

use_this_module
For using this module. Default use_this_module=.false.
[logical]
fraction_increment
For prescribing the fraction of the increment. applied to the restoring period. Default fraction_increment=1.0
[real]
days_to_increment
For specifying the amount of days to restore. Default days_to_increment=1
[integer]
secs_to_increment
For specifying the amount of seconds to restore. Default secs_to_increment=0
[integer]

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