/[MITgcm]/MITgcm/model/inc/PARAMS.h
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revision 1.40 by adcroft, Wed Jul 28 16:32:03 1999 UTC revision 1.54 by adcroft, Wed Jun 6 14:55:45 2001 UTC
# Line 1  Line 1 
1  C $Header$  C $Header$
2    C $Name$
3  C  C
4  C     /==========================================================\  C     /==========================================================\
5  C     | PARAMS.h                                                 |  C     | PARAMS.h                                                 |
# Line 56  C                       in relaxation te Line 57  C                       in relaxation te
57  C     saltClimFile    - File containing salt climataology used  C     saltClimFile    - File containing salt climataology used
58  C                       in relaxation term -lambda(salt-salt*)  C                       in relaxation term -lambda(salt-salt*)
59  C     surfQfile       - File containing surface heat flux  C     surfQfile       - File containing surface heat flux
60    C     surfQswfile     - File containing surface shortwave radiation
61    C     dQdTfile        - File containing thermal relaxation coefficient
62  C     EmPmRfile       - File containing surface fresh water flux  C     EmPmRfile       - File containing surface fresh water flux
63  C     buoyancyRelation - Flag used to indicate which relation to use to  C     buoyancyRelation - Flag used to indicate which relation to use to
64  C                        get buoyancy.  C                        get buoyancy.
# Line 63  C                        get buoyancy. Line 66  C                        get buoyancy.
66       &                bathyFile, hydrogThetaFile, hydrogSaltFile,       &                bathyFile, hydrogThetaFile, hydrogSaltFile,
67       &                zonalWindFile, meridWindFile, thetaClimFile,       &                zonalWindFile, meridWindFile, thetaClimFile,
68       &                saltClimFile, buoyancyRelation,       &                saltClimFile, buoyancyRelation,
69       &                EmPmRfile,surfQfile       &                EmPmRfile, surfQfile, surfQswfile,
70         &                uVelInitFile, vVelInitFile, pSurfInitFile,
71         &                dQdTfile
72        CHARACTER*(5) checkPtSuff(maxNoChkptLev)        CHARACTER*(5) checkPtSuff(maxNoChkptLev)
73        CHARACTER*(MAX_LEN_FNAM) bathyFile        CHARACTER*(MAX_LEN_FNAM) bathyFile
74        CHARACTER*(MAX_LEN_FNAM) hydrogThetaFile        CHARACTER*(MAX_LEN_FNAM) hydrogThetaFile
# Line 73  C                        get buoyancy. Line 78  C                        get buoyancy.
78        CHARACTER*(MAX_LEN_FNAM) thetaClimFile        CHARACTER*(MAX_LEN_FNAM) thetaClimFile
79        CHARACTER*(MAX_LEN_FNAM) saltClimFile        CHARACTER*(MAX_LEN_FNAM) saltClimFile
80        CHARACTER*(MAX_LEN_FNAM) surfQfile        CHARACTER*(MAX_LEN_FNAM) surfQfile
81          CHARACTER*(MAX_LEN_FNAM) surfQswfile
82        CHARACTER*(MAX_LEN_FNAM) EmPmRfile        CHARACTER*(MAX_LEN_FNAM) EmPmRfile
83        CHARACTER*(MAX_LEN_FNAM) buoyancyRelation        CHARACTER*(MAX_LEN_FNAM) buoyancyRelation
84          CHARACTER*(MAX_LEN_FNAM) uVelInitFile
85          CHARACTER*(MAX_LEN_FNAM) vVelInitFile
86          CHARACTER*(MAX_LEN_FNAM) pSurfInitFile
87          CHARACTER*(MAX_LEN_FNAM) dQdTfile
88    
89  C--   COMMON /PARM_I/ Integer valued parameters used by the model.  C--   COMMON /PARM_I/ Integer valued parameters used by the model.
90  C     cg2dMaxIters        - Maximum number of iterations in the  C     cg2dMaxIters        - Maximum number of iterations in the
# Line 93  C     writeStatePrec      - Precision us Line 103  C     writeStatePrec      - Precision us
103  C     writeBinaryPrec     - Precision used for writing binary files  C     writeBinaryPrec     - Precision used for writing binary files
104  C     readBinaryPrec      - Precision used for reading binary files  C     readBinaryPrec      - Precision used for reading binary files
105  C     nCheckLev           - Holds current checkpoint level  C     nCheckLev           - Holds current checkpoint level
 C     nShap               - "Order" of shapiro filter to apply to  
 C                           model prognositic fields.  
 C                           nShap == 1 => del2  
 C                           nShap == 2 => del4  
 C                           nShap == 3 => del6  
 C                           etc...  
106    
107        COMMON /PARM_I/        COMMON /PARM_I/
108       &        cg2dMaxIters,       &        cg2dMaxIters,
109       &        cg2dChkResFreq,       &        cg2dChkResFreq,
110       &        cg3dMaxIters,       &        cg3dMaxIters,
111       &        cg3dChkResFreq,       &        cg3dChkResFreq,
112       &        nIter0, nTimeSteps,       &        nIter0, nTimeSteps, nEndIter,
113       &        numStepsPerPickup,       &        numStepsPerPickup,
114       &        writeStatePrec, nCheckLev,       &        writeStatePrec, nCheckLev,
115       &        writeBinaryPrec, readBinaryPrec,       &        writeBinaryPrec, readBinaryPrec,
116       &        nShap       &        zonal_filt_sinpow, zonal_filt_cospow
117        INTEGER cg2dMaxIters        INTEGER cg2dMaxIters
118        INTEGER cg2dChkResFreq        INTEGER cg2dChkResFreq
119        INTEGER cg3dMaxIters        INTEGER cg3dMaxIters
120        INTEGER cg3dChkResFreq        INTEGER cg3dChkResFreq
121        INTEGER nIter0        INTEGER nIter0
122        INTEGER nTimeSteps        INTEGER nTimeSteps
123          INTEGER nEndIter
124        INTEGER numStepsPerPickup        INTEGER numStepsPerPickup
125        INTEGER writeStatePrec        INTEGER writeStatePrec
126        INTEGER writeBinaryPrec        INTEGER writeBinaryPrec
127        INTEGER readBinaryPrec        INTEGER readBinaryPrec
128        INTEGER nCheckLev        INTEGER nCheckLev
129        INTEGER nShap        INTEGER zonal_filt_sinpow
130          INTEGER zonal_filt_cospow
131    
132  C--   COMMON /PARM_L/ Logical valued parameters used by the model.  C--   COMMON /PARM_L/ Logical valued parameters used by the model.
133  C     usingCartesianGrid - If TRUE grid generation will be in a cartesian  C     usingCartesianGrid - If TRUE grid generation will be in a cartesian
# Line 130  C     usingSphericalPolarGrid - If TRUE Line 136  C     usingSphericalPolarGrid - If TRUE
136  C                               spherical polar frame.  C                               spherical polar frame.
137  C     no_slip_sides - Impose "no-slip" at lateral boundaries.  C     no_slip_sides - Impose "no-slip" at lateral boundaries.
138  C     no_slip_bottom- Impose "no-slip" at bottom boundary.  C     no_slip_bottom- Impose "no-slip" at bottom boundary.
139    C     staggerTimeStep - enable a Stagger time stepping T,S Rho then U,V
140  C     momViscosity  - Flag which turns momentum friction terms on and off.  C     momViscosity  - Flag which turns momentum friction terms on and off.
141  C     momAdvection  - Flag which turns advection of momentum on and off.  C     momAdvection  - Flag which turns advection of momentum on and off.
142  C     momForcing    - Flag which turns external forcing of momentum on  C     momForcing    - Flag which turns external forcing of momentum on
# Line 151  C     saltAdvection - Flag which turns a Line 158  C     saltAdvection - Flag which turns a
158  C                     and off.  C                     and off.
159  C     saltForcing   - Flag which turns external forcing of salinit on  C     saltForcing   - Flag which turns external forcing of salinit on
160  C                     and off.  C                     and off.
 C     implicitFreeSurface - Set to true to use implcit free surface  
161  C     rigidLid            - Set to true to use rigid lid  C     rigidLid            - Set to true to use rigid lid
162    C     implicitFreeSurface - Set to true to use implcit free surface
163    C     exactConserv   -   Set to true to conserve exactly the total Volume
164    C     nonlinFreeSurf -   Set to true to use non-linear free surface
165  C     momStepping   - Turns momentum equation time-stepping off  C     momStepping   - Turns momentum equation time-stepping off
166  C     tempStepping  - Turns temperature equation time-stepping off  C     tempStepping  - Turns temperature equation time-stepping off
167  C     saltStepping  - Turns salinity equation time-stepping off  C     saltStepping  - Turns salinity equation time-stepping off
# Line 170  C     usingPCoords     - Set to indicate Line 179  C     usingPCoords     - Set to indicate
179  C                        coords.  C                        coords.
180  C     usingZCoords     - Set to indicate that we are working in height  C     usingZCoords     - Set to indicate that we are working in height
181  C                        coords.  C                        coords.
 C     openBoundaries - Using open-boundaries  
182  C     nonHydrostatic - Using non-hydrostatic terms  C     nonHydrostatic - Using non-hydrostatic terms
183  C     globalFiles    - Selects between "global" and "tiled" files  C     globalFiles    - Selects between "global" and "tiled" files
184  C     allowFreezing  - Allows water to freeze and form ice  C     allowFreezing  - Allows water to freeze and form ice
185    C     groundAtK1  - put the surface(k=1) at the Lower Boundary (=ground)
186        COMMON /PARM_L/ usingCartesianGrid, usingSphericalPolarGrid,        COMMON /PARM_L/ usingCartesianGrid, usingSphericalPolarGrid,
187         & usingCurvilinearGrid,
188       & no_slip_sides,no_slip_bottom,       & no_slip_sides,no_slip_bottom,
189         & staggerTimeStep,
190       & momViscosity, momAdvection, momForcing, useCoriolis,       & momViscosity, momAdvection, momForcing, useCoriolis,
191       & momPressureForcing,tempDiffusion, tempAdvection, tempForcing,       & momPressureForcing,tempDiffusion, tempAdvection, tempForcing,
192       & saltDiffusion, saltAdvection, saltForcing,       & saltDiffusion, saltAdvection, saltForcing,
193       & implicitFreeSurface, rigidLid,       & rigidLid, implicitFreeSurface, exactConserv, nonlinFreeSurf,
194       & momStepping, tempStepping, saltStepping,       & momStepping, tempStepping, saltStepping,
195       & metricTerms, usingSphericalPolarMTerms,       & metricTerms, usingSphericalPolarMTerms,
196       & useConstantF, useBetaPlaneF, useSphereF,       & useConstantF, useBetaPlaneF, useSphereF,
197       & implicitDiffusion, implicitViscosity,       & implicitDiffusion, implicitViscosity,
198       & doThetaClimRelax, doSaltClimRelax,       & doThetaClimRelax, doSaltClimRelax,
199       & periodicExternalForcing, usingPCoords, usingZCoords,       & periodicExternalForcing, usingPCoords, usingZCoords,
200       & openBoundaries, nonHydrostatic, globalFiles,       & nonHydrostatic, globalFiles,
201       & allowFreezing       & allowFreezing, groundAtK1,
202         & usePickupBeforeC35, debugMode
203        LOGICAL usingCartesianGrid        LOGICAL usingCartesianGrid
204        LOGICAL usingSphericalPolarGrid        LOGICAL usingSphericalPolarGrid
205          LOGICAL usingCurvilinearGrid
206        LOGICAL usingSphericalPolarMTerms        LOGICAL usingSphericalPolarMTerms
207        LOGICAL no_slip_sides        LOGICAL no_slip_sides
208        LOGICAL no_slip_bottom        LOGICAL no_slip_bottom
209          LOGICAL staggerTimeStep
210        LOGICAL momViscosity        LOGICAL momViscosity
211        LOGICAL momAdvection        LOGICAL momAdvection
212        LOGICAL momForcing        LOGICAL momForcing
# Line 204  C     allowFreezing  - Allows water to f Line 218  C     allowFreezing  - Allows water to f
218        LOGICAL saltDiffusion        LOGICAL saltDiffusion
219        LOGICAL saltAdvection        LOGICAL saltAdvection
220        LOGICAL saltForcing        LOGICAL saltForcing
       LOGICAL implicitFreeSurface  
221        LOGICAL rigidLid        LOGICAL rigidLid
222          LOGICAL implicitFreeSurface
223          LOGICAL exactConserv
224          LOGICAL nonlinFreeSurf
225        LOGICAL momStepping        LOGICAL momStepping
226        LOGICAL tempStepping        LOGICAL tempStepping
227        LOGICAL saltStepping        LOGICAL saltStepping
# Line 220  C     allowFreezing  - Allows water to f Line 236  C     allowFreezing  - Allows water to f
236        LOGICAL periodicExternalForcing        LOGICAL periodicExternalForcing
237        LOGICAL usingPCoords        LOGICAL usingPCoords
238        LOGICAL usingZCoords        LOGICAL usingZCoords
       LOGICAL openBoundaries  
239        LOGICAL nonHydrostatic        LOGICAL nonHydrostatic
240        LOGICAL globalFiles        LOGICAL globalFiles
241        LOGICAL allowFreezing        LOGICAL allowFreezing
242          LOGICAL groundAtK1
243          LOGICAL usePickupBeforeC35
244          LOGICAL debugMode
245    
246  C--   COMMON /PARM_R/ "Real" valued parameters used by the model.  C--   COMMON /PARM_R/ "Real" valued parameters used by the model.
247  C     cg2dTargetResidual  C     gg2dTargetResidual
248  C               - Target residual for cg2d solver.  C          - Target residual for cg2d solver; no unit (RHS normalisation)
249    C     cg2dTargetResWunit
250    C          - Target residual for cg2d solver; W unit (No RHS normalisation)
251  C     cg3dTargetResidual  C     cg3dTargetResidual
252  C               - Target residual for cg3d solver.  C               - Target residual for cg3d solver.
253  C     cg2dpcOffDFac - Averaging weight for preconditioner off-diagonal.  C     cg2dpcOffDFac - Averaging weight for preconditioner off-diagonal.
# Line 307  C     deltaTtracer - Timestep for tracer Line 327  C     deltaTtracer - Timestep for tracer
327  C     freesurfFac  - Parameter to turn implicit free surface term on or off  C     freesurfFac  - Parameter to turn implicit free surface term on or off
328  C                    freesurfac = 1. uses implicit free surface  C                    freesurfac = 1. uses implicit free surface
329  C                    freesurfac = 0. uses rigid lid  C                    freesurfac = 0. uses rigid lid
330    C     implicSurfPress - parameter of the Crank-Nickelson time stepping :
331    C                     Implicit part of Surface Pressure Gradient ( 0-1 )
332    C     implicDiv2Dflow - parameter of the Crank-Nickelson time stepping :
333    C                     Implicit part of barotropic flow Divergence ( 0-1 )
334  C     hFacMin      - Minimum fraction size of a cell (affects hFacC etc...)  C     hFacMin      - Minimum fraction size of a cell (affects hFacC etc...)
335  C     hFacMinDz    - Minimum dimesional size of a cell (affects hFacC etc..., m)  C     hFacMinDz    - Minimum dimesional size of a cell (affects hFacC etc..., m)
336  C     hFacMinDp    - Minimum dimesional size of a cell (affects hFacC etc..., Pa)  C     hFacMinDp    - Minimum dimesional size of a cell (affects hFacC etc..., Pa)
337  C     hFacMinDr    - Minimum dimesional size of a cell (affects hFacC etc..., units of r)  C     hFacMinDr    - Minimum dimesional size of a cell (affects hFacC etc..., units of r)
338    C     hFacInf      - Threshold (inf and sup) for fraction size of surface cell
339    C     hFacSup        that control vanishing and creating levels
340  C     tauCD        - CD scheme coupling timescale ( 1/s )  C     tauCD        - CD scheme coupling timescale ( 1/s )
341  C     rCD          - CD scheme normalised coupling parameter ( 0-1 )  C     rCD          - CD scheme normalised coupling parameter ( 0-1 )
 C     GMmaxslope    - max. slope allowed in GM/Redi tensor  
 C     GMlength      - Length to use in Visbeck et al. formula for K (m)  
 C     GMalpha       - alpha to use in Visbeck et al. formula for K  
 C     GMdepth       - Depth over which to integrate Richardson # (Visbeck et al.)  
 C     GMkbackground - background value of GM/Redi diffusion coefficient ( m^2/s )  
 C     GMmaxval      - max. value of KapGM allowed in GM/Redi scheme ( m^2/s )  
342  C     startTime     - Starting time for this integration ( s ).  C     startTime     - Starting time for this integration ( s ).
343  C     endTime       - Ending time for this integration ( s ).  C     endTime       - Ending time for this integration ( s ).
344  C     chkPtFreq     - Frequency of rolling check pointing ( s ).  C     chkPtFreq     - Frequency of rolling check pointing ( s ).
# Line 349  C     recip_horiVertRatio  ( 1 if horiz Line 369  C     recip_horiVertRatio  ( 1 if horiz
369  C                          ( g*rho if horiz in m and vertical in Pa ).  C                          ( g*rho if horiz in m and vertical in Pa ).
370  C     latFFTFiltLo       - Low latitude for FFT filtering of latitude  C     latFFTFiltLo       - Low latitude for FFT filtering of latitude
371  C                          circles ( see filter*.F )  C                          circles ( see filter*.F )
372        COMMON /PARM_R/ cg2dTargetResidual, cg2dpcOffDFac,  C     Ro_SeaLevel        - standard position of Sea-Level in "R" coordinate, used as
373       & cg3dTargetResidual,  C                          starting value (k=1) for vertical coordinate (rf(1)=Ro_SeaLevel)
374    C     bottomDragLinear   - Drag coefficient built in to core dynamics
375    C         "     Quadratic  ( linear: 1/s, quadratic: 1/m )
376          COMMON /PARM_R/ cg2dTargetResidual, cg2dTargetResWunit,
377         & cg2dpcOffDFac, cg3dTargetResidual,
378       & delP, delZ, delR, delX, delY,       & delP, delZ, delR, delX, delY,
379       & deltaT,deltaTmom, deltaTtracer, deltaTClock,abeps, startTime,       & deltaT,deltaTmom, deltaTtracer, deltaTClock,abeps, startTime,
380       & phiMin, thetaMin, rSphere, recip_RSphere, f0, fCori, beta,       & phiMin, thetaMin, rSphere, recip_RSphere, f0, beta,
381         & fCori, fCoriG,
382       & viscAh,  viscAz,  viscA4,  viscAr,       & viscAh,  viscAz,  viscA4,  viscAr,
383       & diffKhT, diffKzT, diffK4T, diffKrT,       & diffKhT, diffKzT, diffK4T, diffKrT,
384       & diffKhS, diffKzS, diffK4S, diffKrS,       & diffKhS, diffKzS, diffK4S, diffKrS,
385       & delT, tauCD, rCD, freeSurfFac, hFacMin, hFacMinDz,       & delT, tauCD, rCD, freeSurfFac, implicSurfPress, implicDiv2Dflow,
386       & GMmaxslope,GMlength,GMalpha,GMdepth,GMkbackground,GMmaxval,       & hFacMin, hFacMinDz, hFacInf, hFacSup,
387       & gravity, recip_Gravity, gBaro, rhonil, recip_rhonil,       & gravity, recip_Gravity, gBaro, rhonil, recip_rhonil,
388       & recip_rhoConst, rhoConst, tRef, sRef,       & recip_rhoConst, rhoConst, tRef, sRef,
389       & endTime, chkPtFreq, pchkPtFreq, dumpFreq, taveFreq,       & endTime, chkPtFreq, pchkPtFreq, dumpFreq, taveFreq, monitorFreq,
390       & afFacMom, vfFacMom, pfFacMom, cfFacMom, foFacMom, mtFacMom,       & afFacMom, vfFacMom, pfFacMom, cfFacMom, foFacMom, mtFacMom,
391       & cosPower,       & cosPower,
392       & cAdjFreq, omega, tauThetaClimRelax, lambdaThetaClimRelax,       & cAdjFreq, omega, tauThetaClimRelax, lambdaThetaClimRelax,
# Line 369  C                          circles ( see Line 394  C                          circles ( see
394       & externForcingCycle, externForcingPeriod,       & externForcingCycle, externForcingPeriod,
395       & viscAp, diffKpT, diffKpS, hFacMinDr, hFacMinDp,       & viscAp, diffKpT, diffKpS, hFacMinDr, hFacMinDp,
396       & theta_S, specVol_S, horiVertRatio, recip_horiVertRatio,       & theta_S, specVol_S, horiVertRatio, recip_horiVertRatio,
397       & latFFTFiltLo       & latFFTFiltLo, ivdc_kappa, Ro_SeaLevel, zonal_filt_lat,
398         & bottomDragLinear,bottomDragQuadratic
399    
400        _RL cg2dTargetResidual        _RL cg2dTargetResidual
401          _RL cg2dTargetResWunit
402        _RL cg3dTargetResidual        _RL cg3dTargetResidual
403        _RL cg2dpcOffDFac        _RL cg2dpcOffDFac
404        _RL delZ(Nr)        _RL delZ(Nr)
# Line 390  C                          circles ( see Line 417  C                          circles ( see
417        _RL recip_RSphere        _RL recip_RSphere
418        _RL f0        _RL f0
419        _RL freeSurfFac        _RL freeSurfFac
420          _RL implicSurfPress
421          _RL implicDiv2Dflow
422        _RL hFacMin        _RL hFacMin
423        _RL hFacMinDz        _RL hFacMinDz
424        _RL hFacMinDp        _RL hFacMinDp
425        _RL hFacMinDr        _RL hFacMinDr
426          _RL hFacInf
427          _RL hFacSup
428        _RL beta        _RL beta
429        _RL viscAh        _RL viscAh
430        _RL viscAz        _RL viscAz
# Line 413  C                          circles ( see Line 444  C                          circles ( see
444        _RL delt        _RL delt
445        _RL tauCD        _RL tauCD
446        _RL rCD        _RL rCD
       _RL GMmaxslope  
       _RL GMlength  
       _RL GMalpha  
       _RL GMdepth  
       _RL GMkbackground  
       _RL GMmaxval  
447        _RL gravity        _RL gravity
448        _RL recip_gravity        _RL recip_gravity
449        _RL gBaro        _RL gBaro
# Line 430  C                          circles ( see Line 455  C                          circles ( see
455        _RL tRef(Nr)        _RL tRef(Nr)
456        _RL theta_S(Nr)        _RL theta_S(Nr)
457        _RL sRef(Nr)        _RL sRef(Nr)
458        _RS Fcori(1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy)        _RS fCori(1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy)
459          _RS fCoriG(1-OLx:sNx+OLx,1-OLy:sNy+OLy,nSx,nSy)
460        _RL startTime        _RL startTime
461        _RL endTime        _RL endTime
462        _RL chkPtFreq        _RL chkPtFreq
463        _RL pChkPtFreq        _RL pChkPtFreq
464        _RL dumpFreq        _RL dumpFreq
465        _RL taveFreq        _RL taveFreq
466          _RL monitorFreq
467        _RL afFacMom        _RL afFacMom
468        _RL vfFacMom        _RL vfFacMom
469        _RL pfFacMom        _RL pfFacMom
# Line 455  C                          circles ( see Line 482  C                          circles ( see
482        _RL horiVertRatio        _RL horiVertRatio
483        _RL recip_horiVertRatio        _RL recip_horiVertRatio
484        _RL latFFTFiltLo        _RL latFFTFiltLo
485          _RL ivdc_kappa
486          _RL Ro_SeaLevel
487          _RL zonal_filt_lat
488          _RL bottomDragLinear
489          _RL bottomDragQuadratic
490    
491        COMMON /PARM_A/ HeatCapacity_Cp,recip_Cp,        COMMON /PARM_A/ HeatCapacity_Cp,recip_Cp,
492       &                Lamba_theta       &                Lamba_theta
# Line 473  C     sBeta     - Linear EOS haline cont Line 505  C     sBeta     - Linear EOS haline cont
505        _RL sBeta        _RL sBeta
506        character*(6) eosType        character*(6) eosType
507    
508  C These are input arrays (of integers) that contain the *absolute*  C Logical flags for selecting packages
509  C computational index of an open-boundary (OB) point.        LOGICAL useKPP
510  C A zero (0) element means there is no corresponding OB in that column/row.        LOGICAL useGMRedi
511  C The computational coordinate refers to "tracer" cells.        LOGICAL useOBCS
512  C For a northern/southern OB, the OB V point is to the south/north.        LOGICAL useAIM
513  C For an eastern/western OB, the OB U point is to the west/east.        LOGICAL useECCO
514  C eg.        LOGICAL useSHAP_FILT
515  C     OB_Jnorth(3)=34  means that:        COMMON /PARM_PACKAGES/
516  C          T( 3 ,34) is a an OB point       &        useKPP, useGMRedi, useOBCS, useAIM, useECCO, useSHAP_FILT
517  C          U(3:4,34) is a an OB point  
 C          V( 4 ,34) is a an OB point  
 C while  
 C     OB_Jsouth(3)=1  means that:  
 C          T( 3 ,1) is a an OB point  
 C          U(3:4,1) is a an OB point  
 C          V( 4 ,2) is a an OB point  
 C  
 C For convenience, negative values for Jnorth/Ieast refer to  
 C points relative to the Northern/Eastern edges of the model  
 C eg. OB_Jnorth(3)=-1  means that the point (3,Ny-1) is a northern O-B.  
 C  
       COMMON /PARM_OB/  
      & OB_Jnorth,OB_Jsouth,OB_Ieast,OB_Iwest  
       INTEGER OB_Jnorth(Nx)  
       INTEGER OB_Jsouth(Nx)  
       INTEGER OB_Ieast(Ny)  
       INTEGER OB_Iwest(Ny)  
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