/[MITgcm]/MITgcm/model/inc/PARAMS.h
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revision 1.27 by cnh, Mon Aug 24 02:25:01 1998 UTC revision 1.44 by adcroft, Wed Jun 21 19:21:44 2000 UTC
# Line 4  C     /================================= Line 4  C     /=================================
4  C     | PARAMS.h                                                 |  C     | PARAMS.h                                                 |
5  C     | o Header file defining model "parameters".               |  C     | o Header file defining model "parameters".               |
6  C     |==========================================================|  C     |==========================================================|
7  C     | The values from the model's standard input file are      |  C     | The values from the model standard input file are        |
8  C     | stored into the variables held here. Notes describing    |  C     | stored into the variables held here. Notes describing    |
9  C     | the parameters can also be found here.                   |  C     | the parameters can also be found here.                   |
10  C     \==========================================================/  C     \==========================================================/
# Line 23  C     Symbolic values Line 23  C     Symbolic values
23  C     precXXXX - Used to indicate what precision to use for  C     precXXXX - Used to indicate what precision to use for
24  C                dumping model state.  C                dumping model state.
25        INTEGER precFloat32        INTEGER precFloat32
26        PARAMETER ( precFloat32 = 0 )        PARAMETER ( precFloat32 = 32 )
27        INTEGER precFloat64        INTEGER precFloat64
28        PARAMETER ( precFloat64 = 1 )        PARAMETER ( precFloat64 = 64 )
29    C     UNSET_xxx - Used to indicate variables that have not been given a value
30          Real*8 UNSET_FLOAT8
31          PARAMETER ( UNSET_FLOAT8 = 1.234567D5 )
32          Real*4 UNSET_FLOAT4
33          PARAMETER ( UNSET_FLOAT4 = 1.234567E5 )
34          _RL    UNSET_RL    
35          PARAMETER ( UNSET_RL     = 1.234567D5 )
36          _RS    UNSET_RS    
37          PARAMETER ( UNSET_RS     = 1.234567E5 )
38          INTEGER UNSET_I
39          PARAMETER ( UNSET_I      = 123456789  )
40    
41  C     Checkpoint data  C     Checkpoint data
42        INTEGER maxNoChkptLev        INTEGER maxNoChkptLev
# Line 44  C     thetaClimFile   - File containing Line 55  C     thetaClimFile   - File containing
55  C                       in relaxation term -lambda(theta-theta*)  C                       in relaxation term -lambda(theta-theta*)
56  C     saltClimFile    - File containing salt climataology used  C     saltClimFile    - File containing salt climataology used
57  C                       in relaxation term -lambda(salt-salt*)  C                       in relaxation term -lambda(salt-salt*)
58    C     surfQfile       - File containing surface heat flux
59    C     EmPmRfile       - File containing surface fresh water flux
60  C     buoyancyRelation - Flag used to indicate which relation to use to  C     buoyancyRelation - Flag used to indicate which relation to use to
61  C                        get buoyancy.  C                        get buoyancy.
62        COMMON /PARM_C/ checkPtSuff,        COMMON /PARM_C/ checkPtSuff,
63       &                bathyFile, hydrogThetaFile, hydrogSaltFile,       &                bathyFile, hydrogThetaFile, hydrogSaltFile,
64       &                zonalWindFile, meridWindFile, thetaClimFile,       &                zonalWindFile, meridWindFile, thetaClimFile,
65       &                saltClimFile, buoyancyRelation       &                saltClimFile, buoyancyRelation,
66         &                EmPmRfile, surfQfile,
67         &                uVelInitFile, vVelInitFile, pSurfInitFile
68        CHARACTER*(5) checkPtSuff(maxNoChkptLev)        CHARACTER*(5) checkPtSuff(maxNoChkptLev)
69        CHARACTER*(MAX_LEN_FNAM) bathyFile        CHARACTER*(MAX_LEN_FNAM) bathyFile
70        CHARACTER*(MAX_LEN_FNAM) hydrogThetaFile        CHARACTER*(MAX_LEN_FNAM) hydrogThetaFile
# Line 58  C                        get buoyancy. Line 73  C                        get buoyancy.
73        CHARACTER*(MAX_LEN_FNAM) meridWindFile        CHARACTER*(MAX_LEN_FNAM) meridWindFile
74        CHARACTER*(MAX_LEN_FNAM) thetaClimFile        CHARACTER*(MAX_LEN_FNAM) thetaClimFile
75        CHARACTER*(MAX_LEN_FNAM) saltClimFile        CHARACTER*(MAX_LEN_FNAM) saltClimFile
76          CHARACTER*(MAX_LEN_FNAM) surfQfile
77          CHARACTER*(MAX_LEN_FNAM) EmPmRfile
78        CHARACTER*(MAX_LEN_FNAM) buoyancyRelation        CHARACTER*(MAX_LEN_FNAM) buoyancyRelation
79          CHARACTER*(MAX_LEN_FNAM) uVelInitFile
80          CHARACTER*(MAX_LEN_FNAM) vVelInitFile
81          CHARACTER*(MAX_LEN_FNAM) pSurfInitFile
82    
83  C--   COMMON /PARM_I/ Integer valued parameters used by the model.  C--   COMMON /PARM_I/ Integer valued parameters used by the model.
84  C     cg2dMaxIters        - Maximum number of iterations in the  C     cg2dMaxIters        - Maximum number of iterations in the
85  C                           two-dimensional con. grad solver.  C                           two-dimensional con. grad solver.
86  C     cg2dChkResFreq      - Frequency with which to check residual  C     cg2dChkResFreq      - Frequency with which to check residual
87  C                           in con. grad solver.  C                           in con. grad solver.
88    C     cg3dMaxIters        - Maximum number of iterations in the
89    C                           three-dimensional con. grad solver.
90    C     cg3dChkResFreq      - Frequency with which to check residual
91    C                           in con. grad solver.
92  C     nIter0              - Start time-step number of for this run  C     nIter0              - Start time-step number of for this run
93  C     nTimeSteps          - Number of timesteps to execute  C     nTimeSteps          - Number of timesteps to execute
94  C     numStepsPerPickup   - For offline setup. Frequency of pickup  C     numStepsPerPickup   - For offline setup. Frequency of pickup
# Line 73  C     writeStatePrec      - Precision us Line 97  C     writeStatePrec      - Precision us
97  C     writeBinaryPrec     - Precision used for writing binary files  C     writeBinaryPrec     - Precision used for writing binary files
98  C     readBinaryPrec      - Precision used for reading binary files  C     readBinaryPrec      - Precision used for reading binary files
99  C     nCheckLev           - Holds current checkpoint level  C     nCheckLev           - Holds current checkpoint level
100    C     nShap               - "Order" of shapiro filter to apply to
101    C                           model prognositic fields.
102    C                           nShap == 1 => del2
103    C                           nShap == 2 => del4
104    C                           nShap == 3 => del6
105    C                           etc...
106    
107        COMMON /PARM_I/        COMMON /PARM_I/
108       &        cg2dMaxIters,       &        cg2dMaxIters,
109       &        cg2dChkResFreq,       &        cg2dChkResFreq,
110       &        nIter0, nTimeSteps,       &        cg3dMaxIters,
111         &        cg3dChkResFreq,
112         &        nIter0, nTimeSteps, nEndIter,
113       &        numStepsPerPickup,       &        numStepsPerPickup,
114       &        writeStatePrec, nCheckLev,       &        writeStatePrec, nCheckLev,
115       &        writeBinaryPrec, readBinaryPrec       &        writeBinaryPrec, readBinaryPrec,
116         &        nShap
117        INTEGER cg2dMaxIters        INTEGER cg2dMaxIters
118        INTEGER cg2dChkResFreq        INTEGER cg2dChkResFreq
119          INTEGER cg3dMaxIters
120          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
130    
131  C--   COMMON /PARM_L/ Logical valued parameters used by the model.  C--   COMMON /PARM_L/ Logical valued parameters used by the model.
132  C     usingCartesianGrid - If TRUE grid generation will be in a cartesian  C     usingCartesianGrid - If TRUE grid generation will be in a cartesian
133  C                          coordinate frame.  C                          coordinate frame.
134  C     usingSphericalPolarGrid - If TRUE grid generation will be in a  C     usingSphericalPolarGrid - If TRUE grid generation will be in a
135  C                               spherical polar frame.  C                               spherical polar frame.
136    C     no_slip_sides - Impose "no-slip" at lateral boundaries.
137    C     no_slip_bottom- Impose "no-slip" at bottom boundary.
138  C     momViscosity  - Flag which turns momentum friction terms on and off.  C     momViscosity  - Flag which turns momentum friction terms on and off.
139  C     momAdvection  - Flag which turns advection of momentum on and off.  C     momAdvection  - Flag which turns advection of momentum on and off.
140  C     momForcing    - Flag which turns external forcing of momentum on  C     momForcing    - Flag which turns external forcing of momentum on
# Line 125  C     useConstantF  - Coriolis parameter Line 165  C     useConstantF  - Coriolis parameter
165  C     useBetaPlaneF - Coriolis parameter set to f0 + beta.y  C     useBetaPlaneF - Coriolis parameter set to f0 + beta.y
166  C     useSphereF    - Coriolis parameter set to 2.omega.sin(phi)  C     useSphereF    - Coriolis parameter set to 2.omega.sin(phi)
167  C     implicitDiffusion - Turns implicit vertical diffusion on  C     implicitDiffusion - Turns implicit vertical diffusion on
168    C     implicitViscosity - Turns implicit vertical viscosity on
169  C     doThetaClimRelax - Set true if relaxation to temperature  C     doThetaClimRelax - Set true if relaxation to temperature
170  C                        climatology is required.  C                        climatology is required.
171  C     doSaltClimRelax  - Set true if relaxation to salinity  C     doSaltClimRelax  - Set true if relaxation to salinity
172  C                        climatology is required.  C                        climatology is required.
173  C     periodicExternalForcing - Set true if forcing is time-dependant  C     periodicExternalForcing - Set true if forcing is time-dependant
174    C     usingPCoords     - Set to indicate that we are working in pressure
175    C                        coords.
176    C     usingZCoords     - Set to indicate that we are working in height
177    C                        coords.
178    C     openBoundaries - Using open-boundaries
179    C     nonHydrostatic - Using non-hydrostatic terms
180    C     globalFiles    - Selects between "global" and "tiled" files
181    C     allowFreezing  - Allows water to freeze and form ice
182        COMMON /PARM_L/ usingCartesianGrid, usingSphericalPolarGrid,        COMMON /PARM_L/ usingCartesianGrid, usingSphericalPolarGrid,
183       & momViscosity, momAdvection, momForcing, useCoriolis, momPressureForcing,       & no_slip_sides,no_slip_bottom,
184       & tempDiffusion, tempAdvection, tempForcing,       & momViscosity, momAdvection, momForcing, useCoriolis,
185         & momPressureForcing,tempDiffusion, tempAdvection, tempForcing,
186       & saltDiffusion, saltAdvection, saltForcing,       & saltDiffusion, saltAdvection, saltForcing,
187       & implicitFreeSurface, rigidLid,       & implicitFreeSurface, rigidLid,
188       & momStepping, tempStepping, saltStepping,       & momStepping, tempStepping, saltStepping,
189       & metricTerms, usingSphericalPolarMTerms,       & metricTerms, usingSphericalPolarMTerms,
190       & useConstantF, useBetaPlaneF, useSphereF,       & useConstantF, useBetaPlaneF, useSphereF,
191       & implicitDiffusion, doThetaClimRelax, doSaltClimRelax,       & implicitDiffusion, implicitViscosity,
192       & periodicExternalForcing       & doThetaClimRelax, doSaltClimRelax,
193         & periodicExternalForcing, usingPCoords, usingZCoords,
194         & openBoundaries, nonHydrostatic, globalFiles,
195         & allowFreezing
196        LOGICAL usingCartesianGrid        LOGICAL usingCartesianGrid
197        LOGICAL usingSphericalPolarGrid        LOGICAL usingSphericalPolarGrid
198        LOGICAL usingSphericalPolarMTerms        LOGICAL usingSphericalPolarMTerms
199          LOGICAL no_slip_sides
200          LOGICAL no_slip_bottom
201        LOGICAL momViscosity        LOGICAL momViscosity
202        LOGICAL momAdvection        LOGICAL momAdvection
203        LOGICAL momForcing        LOGICAL momForcing
# Line 164  C     periodicExternalForcing - Set true Line 219  C     periodicExternalForcing - Set true
219        LOGICAL useBetaPlaneF        LOGICAL useBetaPlaneF
220        LOGICAL useSphereF        LOGICAL useSphereF
221        LOGICAL implicitDiffusion        LOGICAL implicitDiffusion
222          LOGICAL implicitViscosity
223        LOGICAL doThetaClimRelax        LOGICAL doThetaClimRelax
224        LOGICAL doSaltClimRelax        LOGICAL doSaltClimRelax
225        LOGICAL periodicExternalForcing        LOGICAL periodicExternalForcing
226          LOGICAL usingPCoords
227          LOGICAL usingZCoords
228          LOGICAL openBoundaries
229          LOGICAL nonHydrostatic
230          LOGICAL globalFiles
231          LOGICAL allowFreezing
232    
233  C--   COMMON /PARM_R/ "Real" valued parameters used by the model.  C--   COMMON /PARM_R/ "Real" valued parameters used by the model.
234  C     cg2dTargetResidual  C     cg2dTargetResidual
235  C               - Target residual for cg2d solver.  C               - Target residual for cg2d solver.
236    C     cg3dTargetResidual
237    C               - Target residual for cg3d solver.
238  C     cg2dpcOffDFac - Averaging weight for preconditioner off-diagonal.  C     cg2dpcOffDFac - Averaging weight for preconditioner off-diagonal.
239  C     Note. 20th May 1998  C     Note. 20th May 1998
240  C           I made a weird discovery! In the model paper we argue  C           I made a weird discovery! In the model paper we argue
# Line 191  C     delR      - Vertical grid spacing Line 255  C     delR      - Vertical grid spacing
255  C     delX      - Separation between cell faces (m) or (deg), depending  C     delX      - Separation between cell faces (m) or (deg), depending
256  C     delY        on input flags.  C     delY        on input flags.
257  C     gravity   - Accel. due to gravity ( m/s^2 )  C     gravity   - Accel. due to gravity ( m/s^2 )
258    C     recip_gravity and its inverse
259  C     gBaro     - Accel. due to gravity used in barotropic equation ( m/s^2 )  C     gBaro     - Accel. due to gravity used in barotropic equation ( m/s^2 )
260  C     ronil     - Reference density  C     ronil     - Reference density
261  C     rhoConst  - Vertically constant reference density  C     rhoConst  - Vertically constant reference density
# Line 249  C                    freesurfac = 1. use Line 314  C                    freesurfac = 1. use
314  C                    freesurfac = 0. uses rigid lid  C                    freesurfac = 0. uses rigid lid
315  C     hFacMin      - Minimum fraction size of a cell (affects hFacC etc...)  C     hFacMin      - Minimum fraction size of a cell (affects hFacC etc...)
316  C     hFacMinDz    - Minimum dimesional size of a cell (affects hFacC etc..., m)  C     hFacMinDz    - Minimum dimesional size of a cell (affects hFacC etc..., m)
317    C     hFacMinDp    - Minimum dimesional size of a cell (affects hFacC etc..., Pa)
318  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)
319  C     tauCD        - CD scheme coupling timescale ( 1/s )  C     tauCD        - CD scheme coupling timescale ( 1/s )
320  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 )  
321  C     startTime     - Starting time for this integration ( s ).  C     startTime     - Starting time for this integration ( s ).
322  C     endTime       - Ending time for this integration ( s ).  C     endTime       - Ending time for this integration ( s ).
323  C     chkPtFreq     - Frequency of rolling check pointing ( s ).  C     chkPtFreq     - Frequency of rolling check pointing ( s ).
# Line 270  C     pfFacMom      - Momentum pressure Line 330  C     pfFacMom      - Momentum pressure
330  C     cfFacMom      - Coriolis term tracer parameter  C     cfFacMom      - Coriolis term tracer parameter
331  C     foFacMom      - Momentum forcing tracer parameter  C     foFacMom      - Momentum forcing tracer parameter
332  C     mtFacMom      - Metric terms tracer parameter  C     mtFacMom      - Metric terms tracer parameter
333    C     cosPower      - Power of cosine of latitude to multiply viscosity
334  C     cAdjFreq      - Frequency of convective adjustment  C     cAdjFreq      - Frequency of convective adjustment
335  C  C
336  C     taveFreq      - Frequency with which time-averaged model state is written to  C     taveFreq      - Frequency with which time-averaged model state is written to
# Line 282  C     externForcingPeriod - Is the perio Line 343  C     externForcingPeriod - Is the perio
343  C     externForcingCycle - Is the repeat time of the forcing (eg. 1 year)  C     externForcingCycle - Is the repeat time of the forcing (eg. 1 year)
344  C                          (note: externForcingCycle must be an integer  C                          (note: externForcingCycle must be an integer
345  C                           number times externForcingPeriod)  C                           number times externForcingPeriod)
346    C     horiVertRatio      - Ratio on units in vertical to units in horizontal.
347    C     recip_horiVertRatio  ( 1 if horiz in m and vertical in m ).
348    C                          ( g*rho if horiz in m and vertical in Pa ).
349    C     latFFTFiltLo       - Low latitude for FFT filtering of latitude
350    C                          circles ( see filter*.F )
351        COMMON /PARM_R/ cg2dTargetResidual, cg2dpcOffDFac,        COMMON /PARM_R/ cg2dTargetResidual, cg2dpcOffDFac,
352         & cg3dTargetResidual,
353       & delP, delZ, delR, delX, delY,       & delP, delZ, delR, delX, delY,
354       & deltaT,deltaTmom, deltaTtracer, deltaTClock,abeps, startTime, phiMin,       & deltaT,deltaTmom, deltaTtracer, deltaTClock,abeps, startTime,
355       & thetaMin, rSphere, recip_RSphere, f0, fCori, beta,       & phiMin, thetaMin, rSphere, recip_RSphere, f0, fCori, beta,
356       & viscAh,  viscAz,  viscA4,  viscAr,       & viscAh,  viscAz,  viscA4,  viscAr,
357       & diffKhT, diffKzT, diffK4T, diffKrT,       & diffKhT, diffKzT, diffK4T, diffKrT,
358       & diffKhS, diffKzS, diffK4S, diffKrS,       & diffKhS, diffKzS, diffK4S, diffKrS,
359       & delT, tauCD, rCD, freeSurfFac, hFacMin, hFacMinDz,       & delT, tauCD, rCD, freeSurfFac, hFacMin, hFacMinDz,
360       & GMmaxslope,GMlength,GMalpha,GMdepth,GMkbackground,GMmaxval,       & gravity, recip_Gravity, gBaro, rhonil, recip_rhonil,
      & gravity, gBaro, rhonil, recip_rhonil,  
361       & recip_rhoConst, rhoConst, tRef, sRef,       & recip_rhoConst, rhoConst, tRef, sRef,
362       & endTime, chkPtFreq, pchkPtFreq, dumpFreq, taveFreq,       & endTime, chkPtFreq, pchkPtFreq, dumpFreq, taveFreq,
363       & afFacMom, vfFacMom, pfFacMom, cfFacMom, foFacMom, mtFacMom,       & afFacMom, vfFacMom, pfFacMom, cfFacMom, foFacMom, mtFacMom,
364         & cosPower,
365       & cAdjFreq, omega, tauThetaClimRelax, lambdaThetaClimRelax,       & cAdjFreq, omega, tauThetaClimRelax, lambdaThetaClimRelax,
366       & tauSaltClimRelax, lambdaSaltClimRelax,       & tauSaltClimRelax, lambdaSaltClimRelax,
367       & externForcingCycle, externForcingPeriod,       & externForcingCycle, externForcingPeriod,
368       & viscAp, diffKpT, diffKpS, hFacMinDr,       & viscAp, diffKpT, diffKpS, hFacMinDr, hFacMinDp,
369       & theta_S, specVol_S       & theta_S, specVol_S, horiVertRatio, recip_horiVertRatio,
370         & latFFTFiltLo, ivdc_kappa
371    
372        _RL cg2dTargetResidual        _RL cg2dTargetResidual
373          _RL cg3dTargetResidual
374        _RL cg2dpcOffDFac        _RL cg2dpcOffDFac
375        _RL delZ(Nr)        _RL delZ(Nr)
376        _RL delP(Nr)        _RL delP(Nr)
# Line 321  C                           number times Line 390  C                           number times
390        _RL freeSurfFac        _RL freeSurfFac
391        _RL hFacMin        _RL hFacMin
392        _RL hFacMinDz        _RL hFacMinDz
393          _RL hFacMinDp
394        _RL hFacMinDr        _RL hFacMinDr
395        _RL beta        _RL beta
396        _RL viscAh        _RL viscAh
# Line 341  C                           number times Line 411  C                           number times
411        _RL delt        _RL delt
412        _RL tauCD        _RL tauCD
413        _RL rCD        _RL rCD
       _RL GMmaxslope  
       _RL GMlength  
       _RL GMalpha  
       _RL GMdepth  
       _RL GMkbackground  
       _RL GMmaxval  
414        _RL gravity        _RL gravity
415          _RL recip_gravity
416        _RL gBaro        _RL gBaro
417        _RL rhonil        _RL rhonil
418        _RL recip_rhonil        _RL recip_rhonil
# Line 370  C                           number times Line 435  C                           number times
435        _RL cfFacMom        _RL cfFacMom
436        _RL foFacMom        _RL foFacMom
437        _RL mTFacMom        _RL mTFacMom
438          _RL cosPower
439        _RL cAdjFreq        _RL cAdjFreq
440        _RL omega        _RL omega
441        _RL tauThetaClimRelax        _RL tauThetaClimRelax
# Line 378  C                           number times Line 444  C                           number times
444        _RL lambdaSaltClimRelax        _RL lambdaSaltClimRelax
445        _RL externForcingCycle        _RL externForcingCycle
446        _RL externForcingPeriod        _RL externForcingPeriod
447          _RL horiVertRatio
448          _RL recip_horiVertRatio
449          _RL latFFTFiltLo
450          _RL ivdc_kappa
451    
452        COMMON /PARM_A/ HeatCapacity_Cp,        COMMON /PARM_A/ HeatCapacity_Cp,recip_Cp,
453       &                Lamba_theta       &                Lamba_theta
454        _RL HeatCapacity_Cp        _RL HeatCapacity_Cp
455        _RL Lamba_theta        _RL Lamba_theta
456          _RL recip_Cp
457    
458  C Equation of State (polynomial coeffients)  C Equation of State (polynomial coeffients)
459        COMMON /PARM_EOS_NL/ eosC,eosSig0,eosRefT,eosRefS        COMMON /PARM_EOS_NL/ eosC,eosSig0,eosRefT,eosRefS
# Line 395  C     sBeta     - Linear EOS haline cont Line 466  C     sBeta     - Linear EOS haline cont
466        _RL sBeta        _RL sBeta
467        character*(6) eosType        character*(6) eosType
468    
469    C These are input arrays (of integers) that contain the *absolute*
470    C computational index of an open-boundary (OB) point.
471    C A zero (0) element means there is no corresponding OB in that column/row.
472    C The computational coordinate refers to "tracer" cells.
473    C For a northern/southern OB, the OB V point is to the south/north.
474    C For an eastern/western OB, the OB U point is to the west/east.
475    C eg.
476    C     OB_Jnorth(3)=34  means that:
477    C          T( 3 ,34) is a an OB point
478    C          U(3:4,34) is a an OB point
479    C          V( 4 ,34) is a an OB point
480    C while
481    C     OB_Jsouth(3)=1  means that:
482    C          T( 3 ,1) is a an OB point
483    C          U(3:4,1) is a an OB point
484    C          V( 4 ,2) is a an OB point
485    C
486    C For convenience, negative values for Jnorth/Ieast refer to
487    C points relative to the Northern/Eastern edges of the model
488    C eg. OB_Jnorth(3)=-1  means that the point (3,Ny-1) is a northern O-B.
489    C
490          COMMON /PARM_OB/
491         & OB_Jnorth,OB_Jsouth,OB_Ieast,OB_Iwest
492          INTEGER OB_Jnorth(Nx)
493          INTEGER OB_Jsouth(Nx)
494          INTEGER OB_Ieast(Ny)
495          INTEGER OB_Iwest(Ny)
496    
497    C Logical flags for selecting packages
498          LOGICAL use_KPPmixing
499          LOGICAL use_GMRedi
500          COMMON /PARM_PACKAGES/
501         &        use_KPPmixing,use_GMRedi
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