36.2.2 Considerations

• After identifying the ``i,jrow'' locations of the water column pairs to be mixed, an appropriate volume rate of mixing and the depth range for mixing must be specified. Refer to physical oceanography resources for guidance.

• Specify the following information by editing the USER INPUT section of subroutine xland1st: the number of crossland mixing point pairs (parameter nxland), their ``i,jrow'' locations (ixland and jxland), the range of model k-levels to be mixed (kxland), and the time invariant volume rate of mixing (vxland) in units of cm³/sec.

• An upper limit is placed on the value of vxland(nxl). Within a leap frog timestep (including any tracer timestep acceleration effects), no more than one half of a water column may be transported into its paired column. During initialization, a consistancy check is made to insure that the mixing rate specified byvxland(nxl) is not too large. If the researcher implementsvxland(nxl) as a function of time, then this check must be made each time step.

• The size of the model's memory window (parameter jmw) may need to be adjusted, depending upon the j-row separation of pairs of crossland mixing points. The following condition must be met:

  
  

  $$\vert(jxland(nxl,2) - jxland(nxl,1)\vert \leq (jmw-1)/2\;\;\;\; for\;nxl=1,\; nxland$$ (36.5)

  
  

After identifying the ``i,jrow'' locations of the water column pairs to be mixed, an appropriate volume rate of mixing and the depth range for mixing must be specified. Refer to physical oceanography resources for guidance.

Specify the following information by editing the USER INPUT section of subroutine xland1st: the number of crossland mixing point pairs (parameter nxland), their ``i,jrow'' locations (ixland and jxland), the range of model k-levels to be mixed (kxland), and the time invariant volume rate of mixing (vxland) in units of cm³/sec.

An upper limit is placed on the value of vxland(nxl). Within a leap frog timestep (including any tracer timestep acceleration effects), no more than one half of a water column may be transported into its paired column. During initialization, a consistancy check is made to insure that the mixing rate specified byvxland(nxl) is not too large. If the researcher implementsvxland(nxl) as a function of time, then this check must be made each time step.

The size of the model's memory window (parameter jmw) may need to be adjusted, depending upon the j-row separation of pairs of crossland mixing points. The following condition must be met:

$$\vert(jxland(nxl,2) - jxland(nxl,1)\vert \leq (jmw-1)/2\;\;\;\; for\;nxl=1,\; nxland$$ (36.6)